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authorIngo Molnar <mingo@elte.hu>2005-09-10 03:25:56 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-10 13:06:21 -0400
commitfb1c8f93d869b34cacb8b8932e2b83d96a19d720 (patch)
treea006d078aa02e421a7dc4793c335308204859d36
parent4327edf6b8a7ac7dce144313947995538842d8fd (diff)
[PATCH] spinlock consolidation
This patch (written by me and also containing many suggestions of Arjan van de Ven) does a major cleanup of the spinlock code. It does the following things: - consolidates and enhances the spinlock/rwlock debugging code - simplifies the asm/spinlock.h files - encapsulates the raw spinlock type and moves generic spinlock features (such as ->break_lock) into the generic code. - cleans up the spinlock code hierarchy to get rid of the spaghetti. Most notably there's now only a single variant of the debugging code, located in lib/spinlock_debug.c. (previously we had one SMP debugging variant per architecture, plus a separate generic one for UP builds) Also, i've enhanced the rwlock debugging facility, it will now track write-owners. There is new spinlock-owner/CPU-tracking on SMP builds too. All locks have lockup detection now, which will work for both soft and hard spin/rwlock lockups. The arch-level include files now only contain the minimally necessary subset of the spinlock code - all the rest that can be generalized now lives in the generic headers: include/asm-i386/spinlock_types.h | 16 include/asm-x86_64/spinlock_types.h | 16 I have also split up the various spinlock variants into separate files, making it easier to see which does what. The new layout is: SMP | UP ----------------------------|----------------------------------- asm/spinlock_types_smp.h | linux/spinlock_types_up.h linux/spinlock_types.h | linux/spinlock_types.h asm/spinlock_smp.h | linux/spinlock_up.h linux/spinlock_api_smp.h | linux/spinlock_api_up.h linux/spinlock.h | linux/spinlock.h /* * here's the role of the various spinlock/rwlock related include files: * * on SMP builds: * * asm/spinlock_types.h: contains the raw_spinlock_t/raw_rwlock_t and the * initializers * * linux/spinlock_types.h: * defines the generic type and initializers * * asm/spinlock.h: contains the __raw_spin_*()/etc. lowlevel * implementations, mostly inline assembly code * * (also included on UP-debug builds:) * * linux/spinlock_api_smp.h: * contains the prototypes for the _spin_*() APIs. * * linux/spinlock.h: builds the final spin_*() APIs. * * on UP builds: * * linux/spinlock_type_up.h: * contains the generic, simplified UP spinlock type. * (which is an empty structure on non-debug builds) * * linux/spinlock_types.h: * defines the generic type and initializers * * linux/spinlock_up.h: * contains the __raw_spin_*()/etc. version of UP * builds. (which are NOPs on non-debug, non-preempt * builds) * * (included on UP-non-debug builds:) * * linux/spinlock_api_up.h: * builds the _spin_*() APIs. * * linux/spinlock.h: builds the final spin_*() APIs. */ All SMP and UP architectures are converted by this patch. arm, i386, ia64, ppc, ppc64, s390/s390x, x64 was build-tested via crosscompilers. m32r, mips, sh, sparc, have not been tested yet, but should be mostly fine. From: Grant Grundler <grundler@parisc-linux.org> Booted and lightly tested on a500-44 (64-bit, SMP kernel, dual CPU). Builds 32-bit SMP kernel (not booted or tested). I did not try to build non-SMP kernels. That should be trivial to fix up later if necessary. I converted bit ops atomic_hash lock to raw_spinlock_t. Doing so avoids some ugly nesting of linux/*.h and asm/*.h files. Those particular locks are well tested and contained entirely inside arch specific code. I do NOT expect any new issues to arise with them. If someone does ever need to use debug/metrics with them, then they will need to unravel this hairball between spinlocks, atomic ops, and bit ops that exist only because parisc has exactly one atomic instruction: LDCW (load and clear word). From: "Luck, Tony" <tony.luck@intel.com> ia64 fix Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjanv@infradead.org> Signed-off-by: Grant Grundler <grundler@parisc-linux.org> Cc: Matthew Wilcox <willy@debian.org> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Mikael Pettersson <mikpe@csd.uu.se> Signed-off-by: Benoit Boissinot <benoit.boissinot@ens-lyon.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat
-rw-r--r--arch/alpha/kernel/alpha_ksyms.c9
-rw-r--r--arch/alpha/kernel/smp.c172
-rw-r--r--arch/ia64/kernel/mca.c11
-rw-r--r--arch/m32r/kernel/smp.c48
-rw-r--r--arch/mips/lib/dec_and_lock.c8
-rw-r--r--arch/parisc/lib/Makefile2
-rw-r--r--arch/parisc/lib/bitops.c4
-rw-r--r--arch/parisc/lib/debuglocks.c277
-rw-r--r--arch/ppc/lib/Makefile1
-rw-r--r--arch/ppc/lib/dec_and_lock.c8
-rw-r--r--arch/ppc64/lib/dec_and_lock.c8
-rw-r--r--arch/ppc64/lib/locks.c14
-rw-r--r--arch/s390/lib/spinlock.c12
-rw-r--r--arch/sparc/kernel/sparc_ksyms.c10
-rw-r--r--arch/sparc/lib/Makefile2
-rw-r--r--arch/sparc/lib/debuglocks.c202
-rw-r--r--arch/sparc64/kernel/process.c5
-rw-r--r--arch/sparc64/kernel/sparc64_ksyms.c5
-rw-r--r--arch/sparc64/lib/Makefile1
-rw-r--r--arch/sparc64/lib/debuglocks.c366
-rw-r--r--fs/buffer.c1
-rw-r--r--include/asm-alpha/spinlock.h96
-rw-r--r--include/asm-alpha/spinlock_types.h20
-rw-r--r--include/asm-arm/spinlock.h50
-rw-r--r--include/asm-arm/spinlock_types.h20
-rw-r--r--include/asm-i386/spinlock.h200
-rw-r--r--include/asm-i386/spinlock_types.h20
-rw-r--r--include/asm-ia64/spinlock.h69
-rw-r--r--include/asm-ia64/spinlock_types.h21
-rw-r--r--include/asm-m32r/spinlock.h127
-rw-r--r--include/asm-m32r/spinlock_types.h23
-rw-r--r--include/asm-mips/spinlock.h75
-rw-r--r--include/asm-mips/spinlock_types.h20
-rw-r--r--include/asm-parisc/atomic.h12
-rw-r--r--include/asm-parisc/bitops.h2
-rw-r--r--include/asm-parisc/cacheflush.h1
-rw-r--r--include/asm-parisc/processor.h1
-rw-r--r--include/asm-parisc/spinlock.h163
-rw-r--r--include/asm-parisc/spinlock_types.h21
-rw-r--r--include/asm-parisc/system.h24
-rw-r--r--include/asm-ppc/spinlock.h91
-rw-r--r--include/asm-ppc/spinlock_types.h20
-rw-r--r--include/asm-ppc64/spinlock.h191
-rw-r--r--include/asm-ppc64/spinlock_types.h20
-rw-r--r--include/asm-s390/spinlock.h63
-rw-r--r--include/asm-s390/spinlock_types.h21
-rw-r--r--include/asm-sh/spinlock.h61
-rw-r--r--include/asm-sh/spinlock_types.h22
-rw-r--r--include/asm-sparc/spinlock.h140
-rw-r--r--include/asm-sparc/spinlock_types.h20
-rw-r--r--include/asm-sparc64/spinlock.h160
-rw-r--r--include/asm-sparc64/spinlock_types.h20
-rw-r--r--include/asm-x86_64/spinlock.h164
-rw-r--r--include/asm-x86_64/spinlock_types.h20
-rw-r--r--include/linux/bit_spinlock.h77
-rw-r--r--include/linux/jbd.h1
-rw-r--r--include/linux/spinlock.h627
-rw-r--r--include/linux/spinlock_api_smp.h57
-rw-r--r--include/linux/spinlock_api_up.h80
-rw-r--r--include/linux/spinlock_types.h67
-rw-r--r--include/linux/spinlock_types_up.h51
-rw-r--r--include/linux/spinlock_up.h74
-rw-r--r--kernel/Makefile1
-rw-r--r--kernel/sched.c4
-rw-r--r--kernel/spinlock.c15
-rw-r--r--lib/Makefile1
-rw-r--r--lib/dec_and_lock.c3
-rw-r--r--lib/kernel_lock.c3
-rw-r--r--lib/spinlock_debug.c257
69 files changed, 1591 insertions, 2871 deletions
diff --git a/arch/alpha/kernel/alpha_ksyms.c b/arch/alpha/kernel/alpha_ksyms.c
index fc5ef90c4fc9..24ae9a366073 100644
--- a/arch/alpha/kernel/alpha_ksyms.c
+++ b/arch/alpha/kernel/alpha_ksyms.c
@@ -185,15 +185,6 @@ EXPORT_SYMBOL(smp_num_cpus);
185EXPORT_SYMBOL(smp_call_function); 185EXPORT_SYMBOL(smp_call_function);
186EXPORT_SYMBOL(smp_call_function_on_cpu); 186EXPORT_SYMBOL(smp_call_function_on_cpu);
187EXPORT_SYMBOL(_atomic_dec_and_lock); 187EXPORT_SYMBOL(_atomic_dec_and_lock);
188#ifdef CONFIG_DEBUG_SPINLOCK
189EXPORT_SYMBOL(_raw_spin_unlock);
190EXPORT_SYMBOL(debug_spin_lock);
191EXPORT_SYMBOL(debug_spin_trylock);
192#endif
193#ifdef CONFIG_DEBUG_RWLOCK
194EXPORT_SYMBOL(_raw_write_lock);
195EXPORT_SYMBOL(_raw_read_lock);
196#endif
197EXPORT_SYMBOL(cpu_present_mask); 188EXPORT_SYMBOL(cpu_present_mask);
198#endif /* CONFIG_SMP */ 189#endif /* CONFIG_SMP */
199 190
diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c
index e211aa7404e6..da0be3465791 100644
--- a/arch/alpha/kernel/smp.c
+++ b/arch/alpha/kernel/smp.c
@@ -989,175 +989,3 @@ flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
989 989
990 preempt_enable(); 990 preempt_enable();
991} 991}
992
993#ifdef CONFIG_DEBUG_SPINLOCK
994void
995_raw_spin_unlock(spinlock_t * lock)
996{
997 mb();
998 lock->lock = 0;
999
1000 lock->on_cpu = -1;
1001 lock->previous = NULL;
1002 lock->task = NULL;
1003 lock->base_file = "none";
1004 lock->line_no = 0;
1005}
1006
1007void
1008debug_spin_lock(spinlock_t * lock, const char *base_file, int line_no)
1009{
1010 long tmp;
1011 long stuck;
1012 void *inline_pc = __builtin_return_address(0);
1013 unsigned long started = jiffies;
1014 int printed = 0;
1015 int cpu = smp_processor_id();
1016
1017 stuck = 1L << 30;
1018 try_again:
1019
1020 /* Use sub-sections to put the actual loop at the end
1021 of this object file's text section so as to perfect
1022 branch prediction. */
1023 __asm__ __volatile__(
1024 "1: ldl_l %0,%1\n"
1025 " subq %2,1,%2\n"
1026 " blbs %0,2f\n"
1027 " or %0,1,%0\n"
1028 " stl_c %0,%1\n"
1029 " beq %0,3f\n"
1030 "4: mb\n"
1031 ".subsection 2\n"
1032 "2: ldl %0,%1\n"
1033 " subq %2,1,%2\n"
1034 "3: blt %2,4b\n"
1035 " blbs %0,2b\n"
1036 " br 1b\n"
1037 ".previous"
1038 : "=r" (tmp), "=m" (lock->lock), "=r" (stuck)
1039 : "m" (lock->lock), "2" (stuck) : "memory");
1040
1041 if (stuck < 0) {
1042 printk(KERN_WARNING
1043 "%s:%d spinlock stuck in %s at %p(%d)"
1044 " owner %s at %p(%d) %s:%d\n",
1045 base_file, line_no,
1046 current->comm, inline_pc, cpu,
1047 lock->task->comm, lock->previous,
1048 lock->on_cpu, lock->base_file, lock->line_no);
1049 stuck = 1L << 36;
1050 printed = 1;
1051 goto try_again;
1052 }
1053
1054 /* Exiting. Got the lock. */
1055 lock->on_cpu = cpu;
1056 lock->previous = inline_pc;
1057 lock->task = current;
1058 lock->base_file = base_file;
1059 lock->line_no = line_no;
1060
1061 if (printed) {
1062 printk(KERN_WARNING
1063 "%s:%d spinlock grabbed in %s at %p(%d) %ld ticks\n",
1064 base_file, line_no, current->comm, inline_pc,
1065 cpu, jiffies - started);
1066 }
1067}
1068
1069int
1070debug_spin_trylock(spinlock_t * lock, const char *base_file, int line_no)
1071{
1072 int ret;
1073 if ((ret = !test_and_set_bit(0, lock))) {
1074 lock->on_cpu = smp_processor_id();
1075 lock->previous = __builtin_return_address(0);
1076 lock->task = current;
1077 } else {
1078 lock->base_file = base_file;
1079 lock->line_no = line_no;
1080 }
1081 return ret;
1082}
1083#endif /* CONFIG_DEBUG_SPINLOCK */
1084
1085#ifdef CONFIG_DEBUG_RWLOCK
1086void _raw_write_lock(rwlock_t * lock)
1087{
1088 long regx, regy;
1089 int stuck_lock, stuck_reader;
1090 void *inline_pc = __builtin_return_address(0);
1091
1092 try_again:
1093
1094 stuck_lock = 1<<30;
1095 stuck_reader = 1<<30;
1096
1097 __asm__ __volatile__(
1098 "1: ldl_l %1,%0\n"
1099 " blbs %1,6f\n"
1100 " blt %1,8f\n"
1101 " mov 1,%1\n"
1102 " stl_c %1,%0\n"
1103 " beq %1,6f\n"
1104 "4: mb\n"
1105 ".subsection 2\n"
1106 "6: blt %3,4b # debug\n"
1107 " subl %3,1,%3 # debug\n"
1108 " ldl %1,%0\n"
1109 " blbs %1,6b\n"
1110 "8: blt %4,4b # debug\n"
1111 " subl %4,1,%4 # debug\n"
1112 " ldl %1,%0\n"
1113 " blt %1,8b\n"
1114 " br 1b\n"
1115 ".previous"
1116 : "=m" (*(volatile int *)lock), "=&r" (regx), "=&r" (regy),
1117 "=&r" (stuck_lock), "=&r" (stuck_reader)
1118 : "m" (*(volatile int *)lock), "3" (stuck_lock), "4" (stuck_reader) : "memory");
1119
1120 if (stuck_lock < 0) {
1121 printk(KERN_WARNING "write_lock stuck at %p\n", inline_pc);
1122 goto try_again;
1123 }
1124 if (stuck_reader < 0) {
1125 printk(KERN_WARNING "write_lock stuck on readers at %p\n",
1126 inline_pc);
1127 goto try_again;
1128 }
1129}
1130
1131void _raw_read_lock(rwlock_t * lock)
1132{
1133 long regx;
1134 int stuck_lock;
1135 void *inline_pc = __builtin_return_address(0);
1136
1137 try_again:
1138
1139 stuck_lock = 1<<30;
1140
1141 __asm__ __volatile__(
1142 "1: ldl_l %1,%0;"
1143 " blbs %1,6f;"
1144 " subl %1,2,%1;"
1145 " stl_c %1,%0;"
1146 " beq %1,6f;"
1147 "4: mb\n"
1148 ".subsection 2\n"
1149 "6: ldl %1,%0;"
1150 " blt %2,4b # debug\n"
1151 " subl %2,1,%2 # debug\n"
1152 " blbs %1,6b;"
1153 " br 1b\n"
1154 ".previous"
1155 : "=m" (*(volatile int *)lock), "=&r" (regx), "=&r" (stuck_lock)
1156 : "m" (*(volatile int *)lock), "2" (stuck_lock) : "memory");
1157
1158 if (stuck_lock < 0) {
1159 printk(KERN_WARNING "read_lock stuck at %p\n", inline_pc);
1160 goto try_again;
1161 }
1162}
1163#endif /* CONFIG_DEBUG_RWLOCK */
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 4ebbf3974381..8d484204a3ff 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -491,12 +491,7 @@ init_handler_platform (pal_min_state_area_t *ms,
491 unw_init_from_interruption(&info, current, pt, sw); 491 unw_init_from_interruption(&info, current, pt, sw);
492 ia64_do_show_stack(&info, NULL); 492 ia64_do_show_stack(&info, NULL);
493 493
494#ifdef CONFIG_SMP 494 if (read_trylock(&tasklist_lock)) {
495 /* read_trylock() would be handy... */
496 if (!tasklist_lock.write_lock)
497 read_lock(&tasklist_lock);
498#endif
499 {
500 struct task_struct *g, *t; 495 struct task_struct *g, *t;
501 do_each_thread (g, t) { 496 do_each_thread (g, t) {
502 if (t == current) 497 if (t == current)
@@ -506,10 +501,6 @@ init_handler_platform (pal_min_state_area_t *ms,
506 show_stack(t, NULL); 501 show_stack(t, NULL);
507 } while_each_thread (g, t); 502 } while_each_thread (g, t);
508 } 503 }
509#ifdef CONFIG_SMP
510 if (!tasklist_lock.write_lock)
511 read_unlock(&tasklist_lock);
512#endif
513 504
514 printk("\nINIT dump complete. Please reboot now.\n"); 505 printk("\nINIT dump complete. Please reboot now.\n");
515 while (1); /* hang city if no debugger */ 506 while (1); /* hang city if no debugger */
diff --git a/arch/m32r/kernel/smp.c b/arch/m32r/kernel/smp.c
index 48b187f2d2b3..a4576ac7e870 100644
--- a/arch/m32r/kernel/smp.c
+++ b/arch/m32r/kernel/smp.c
@@ -892,7 +892,6 @@ unsigned long send_IPI_mask_phys(cpumask_t physid_mask, int ipi_num,
892 int try) 892 int try)
893{ 893{
894 spinlock_t *ipilock; 894 spinlock_t *ipilock;
895 unsigned long flags = 0;
896 volatile unsigned long *ipicr_addr; 895 volatile unsigned long *ipicr_addr;
897 unsigned long ipicr_val; 896 unsigned long ipicr_val;
898 unsigned long my_physid_mask; 897 unsigned long my_physid_mask;
@@ -916,50 +915,27 @@ unsigned long send_IPI_mask_phys(cpumask_t physid_mask, int ipi_num,
916 * write IPICRi (send IPIi) 915 * write IPICRi (send IPIi)
917 * unlock ipi_lock[i] 916 * unlock ipi_lock[i]
918 */ 917 */
918 spin_lock(ipilock);
919 __asm__ __volatile__ ( 919 __asm__ __volatile__ (
920 ";; LOCK ipi_lock[i] \n\t" 920 ";; CHECK IPICRi == 0 \n\t"
921 ".fillinsn \n" 921 ".fillinsn \n"
922 "1: \n\t" 922 "1: \n\t"
923 "mvfc %1, psw \n\t" 923 "ld %0, @%1 \n\t"
924 "clrpsw #0x40 -> nop \n\t" 924 "and %0, %4 \n\t"
925 DCACHE_CLEAR("r4", "r5", "%2") 925 "beqz %0, 2f \n\t"
926 "lock r4, @%2 \n\t" 926 "bnez %3, 3f \n\t"
927 "addi r4, #-1 \n\t"
928 "unlock r4, @%2 \n\t"
929 "mvtc %1, psw \n\t"
930 "bnez r4, 2f \n\t"
931 LOCK_SECTION_START(".balign 4 \n\t")
932 ".fillinsn \n"
933 "2: \n\t"
934 "ld r4, @%2 \n\t"
935 "blez r4, 2b \n\t"
936 "bra 1b \n\t" 927 "bra 1b \n\t"
937 LOCK_SECTION_END
938 ";; CHECK IPICRi == 0 \n\t"
939 ".fillinsn \n"
940 "3: \n\t"
941 "ld %0, @%3 \n\t"
942 "and %0, %6 \n\t"
943 "beqz %0, 4f \n\t"
944 "bnez %5, 5f \n\t"
945 "bra 3b \n\t"
946 ";; WRITE IPICRi (send IPIi) \n\t" 928 ";; WRITE IPICRi (send IPIi) \n\t"
947 ".fillinsn \n" 929 ".fillinsn \n"
948 "4: \n\t" 930 "2: \n\t"
949 "st %4, @%3 \n\t" 931 "st %2, @%1 \n\t"
950 ";; UNLOCK ipi_lock[i] \n\t"
951 ".fillinsn \n" 932 ".fillinsn \n"
952 "5: \n\t" 933 "3: \n\t"
953 "ldi r4, #1 \n\t"
954 "st r4, @%2 \n\t"
955 : "=&r"(ipicr_val) 934 : "=&r"(ipicr_val)
956 : "r"(flags), "r"(&ipilock->slock), "r"(ipicr_addr), 935 : "r"(ipicr_addr), "r"(mask), "r"(try), "r"(my_physid_mask)
957 "r"(mask), "r"(try), "r"(my_physid_mask) 936 : "memory"
958 : "memory", "r4"
959#ifdef CONFIG_CHIP_M32700_TS1
960 , "r5"
961#endif /* CONFIG_CHIP_M32700_TS1 */
962 ); 937 );
938 spin_unlock(ipilock);
963 939
964 return ipicr_val; 940 return ipicr_val;
965} 941}
diff --git a/arch/mips/lib/dec_and_lock.c b/arch/mips/lib/dec_and_lock.c
index e44e9579bd36..fd82c84a93b7 100644
--- a/arch/mips/lib/dec_and_lock.c
+++ b/arch/mips/lib/dec_and_lock.c
@@ -20,14 +20,7 @@
20 * has a cmpxchg, and where atomic->value is an int holding 20 * has a cmpxchg, and where atomic->value is an int holding
21 * the value of the atomic (i.e. the high bits aren't used 21 * the value of the atomic (i.e. the high bits aren't used
22 * for a lock or anything like that). 22 * for a lock or anything like that).
23 *
24 * N.B. ATOMIC_DEC_AND_LOCK gets defined in include/linux/spinlock.h
25 * if spinlocks are empty and thus atomic_dec_and_lock is defined
26 * to be atomic_dec_and_test - in that case we don't need it
27 * defined here as well.
28 */ 23 */
29
30#ifndef ATOMIC_DEC_AND_LOCK
31int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock) 24int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock)
32{ 25{
33 int counter; 26 int counter;
@@ -52,4 +45,3 @@ int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock)
52} 45}
53 46
54EXPORT_SYMBOL(_atomic_dec_and_lock); 47EXPORT_SYMBOL(_atomic_dec_and_lock);
55#endif /* ATOMIC_DEC_AND_LOCK */
diff --git a/arch/parisc/lib/Makefile b/arch/parisc/lib/Makefile
index 7bf705676297..5f2e6904d14a 100644
--- a/arch/parisc/lib/Makefile
+++ b/arch/parisc/lib/Makefile
@@ -5,5 +5,3 @@
5lib-y := lusercopy.o bitops.o checksum.o io.o memset.o fixup.o memcpy.o 5lib-y := lusercopy.o bitops.o checksum.o io.o memset.o fixup.o memcpy.o
6 6
7obj-y := iomap.o 7obj-y := iomap.o
8
9lib-$(CONFIG_SMP) += debuglocks.o
diff --git a/arch/parisc/lib/bitops.c b/arch/parisc/lib/bitops.c
index 2de182f6fe8a..90f400b10282 100644
--- a/arch/parisc/lib/bitops.c
+++ b/arch/parisc/lib/bitops.c
@@ -13,8 +13,8 @@
13#include <asm/atomic.h> 13#include <asm/atomic.h>
14 14
15#ifdef CONFIG_SMP 15#ifdef CONFIG_SMP
16spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned = { 16raw_spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned = {
17 [0 ... (ATOMIC_HASH_SIZE-1)] = SPIN_LOCK_UNLOCKED 17 [0 ... (ATOMIC_HASH_SIZE-1)] = __RAW_SPIN_LOCK_UNLOCKED
18}; 18};
19#endif 19#endif
20 20
diff --git a/arch/parisc/lib/debuglocks.c b/arch/parisc/lib/debuglocks.c
deleted file mode 100644
index 1b33fe6e5b7a..000000000000
--- a/arch/parisc/lib/debuglocks.c
+++ /dev/null
@@ -1,277 +0,0 @@
1/*
2 * Debugging versions of SMP locking primitives.
3 *
4 * Copyright (C) 2004 Thibaut VARENE <varenet@parisc-linux.org>
5 *
6 * Some code stollen from alpha & sparc64 ;)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * We use pdc_printf() throughout the file for all output messages, to avoid
23 * losing messages because of disabled interrupts. Since we're using these
24 * messages for debugging purposes, it makes sense not to send them to the
25 * linux console.
26 */
27
28
29#include <linux/config.h>
30#include <linux/kernel.h>
31#include <linux/sched.h>
32#include <linux/spinlock.h>
33#include <linux/hardirq.h> /* in_interrupt() */
34#include <asm/system.h>
35#include <asm/hardirq.h> /* in_interrupt() */
36#include <asm/pdc.h>
37
38#undef INIT_STUCK
39#define INIT_STUCK 1L << 30
40
41#ifdef CONFIG_DEBUG_SPINLOCK
42
43
44void _dbg_spin_lock(spinlock_t * lock, const char *base_file, int line_no)
45{
46 volatile unsigned int *a;
47 long stuck = INIT_STUCK;
48 void *inline_pc = __builtin_return_address(0);
49 unsigned long started = jiffies;
50 int printed = 0;
51 int cpu = smp_processor_id();
52
53try_again:
54
55 /* Do the actual locking */
56 /* <T-Bone> ggg: we can't get stuck on the outter loop?
57 * <ggg> T-Bone: We can hit the outer loop
58 * alot if multiple CPUs are constantly racing for a lock
59 * and the backplane is NOT fair about which CPU sees
60 * the update first. But it won't hang since every failed
61 * attempt will drop us back into the inner loop and
62 * decrement `stuck'.
63 * <ggg> K-class and some of the others are NOT fair in the HW
64 * implementation so we could see false positives.
65 * But fixing the lock contention is easier than
66 * fixing the HW to be fair.
67 * <tausq> __ldcw() returns 1 if we get the lock; otherwise we
68 * spin until the value of the lock changes, or we time out.
69 */
70 mb();
71 a = __ldcw_align(lock);
72 while (stuck && (__ldcw(a) == 0))
73 while ((*a == 0) && --stuck);
74 mb();
75
76 if (unlikely(stuck <= 0)) {
77 pdc_printf(
78 "%s:%d: spin_lock(%s/%p) stuck in %s at %p(%d)"
79 " owned by %s:%d in %s at %p(%d)\n",
80 base_file, line_no, lock->module, lock,
81 current->comm, inline_pc, cpu,
82 lock->bfile, lock->bline, lock->task->comm,
83 lock->previous, lock->oncpu);
84 stuck = INIT_STUCK;
85 printed = 1;
86 goto try_again;
87 }
88
89 /* Exiting. Got the lock. */
90 lock->oncpu = cpu;
91 lock->previous = inline_pc;
92 lock->task = current;
93 lock->bfile = (char *)base_file;
94 lock->bline = line_no;
95
96 if (unlikely(printed)) {
97 pdc_printf(
98 "%s:%d: spin_lock grabbed in %s at %p(%d) %ld ticks\n",
99 base_file, line_no, current->comm, inline_pc,
100 cpu, jiffies - started);
101 }
102}
103
104void _dbg_spin_unlock(spinlock_t * lock, const char *base_file, int line_no)
105{
106 CHECK_LOCK(lock);
107 volatile unsigned int *a;
108 mb();
109 a = __ldcw_align(lock);
110 if (unlikely((*a != 0) && lock->babble)) {
111 lock->babble--;
112 pdc_printf(
113 "%s:%d: spin_unlock(%s:%p) not locked\n",
114 base_file, line_no, lock->module, lock);
115 }
116 *a = 1;
117 mb();
118}
119
120int _dbg_spin_trylock(spinlock_t * lock, const char *base_file, int line_no)
121{
122 int ret;
123 volatile unsigned int *a;
124 mb();
125 a = __ldcw_align(lock);
126 ret = (__ldcw(a) != 0);
127 mb();
128 if (ret) {
129 lock->oncpu = smp_processor_id();
130 lock->previous = __builtin_return_address(0);
131 lock->task = current;
132 } else {
133 lock->bfile = (char *)base_file;
134 lock->bline = line_no;
135 }
136 return ret;
137}
138
139#endif /* CONFIG_DEBUG_SPINLOCK */
140
141#ifdef CONFIG_DEBUG_RWLOCK
142
143/* Interrupts trouble detailed explanation, thx Grant:
144 *
145 * o writer (wants to modify data) attempts to acquire the rwlock
146 * o He gets the write lock.
147 * o Interupts are still enabled, we take an interrupt with the
148 * write still holding the lock.
149 * o interrupt handler tries to acquire the rwlock for read.
150 * o deadlock since the writer can't release it at this point.
151 *
152 * In general, any use of spinlocks that competes between "base"
153 * level and interrupt level code will risk deadlock. Interrupts
154 * need to be disabled in the base level routines to avoid it.
155 * Or more precisely, only the IRQ the base level routine
156 * is competing with for the lock. But it's more efficient/faster
157 * to just disable all interrupts on that CPU to guarantee
158 * once it gets the lock it can release it quickly too.
159 */
160
161void _dbg_write_lock(rwlock_t *rw, const char *bfile, int bline)
162{
163 void *inline_pc = __builtin_return_address(0);
164 unsigned long started = jiffies;
165 long stuck = INIT_STUCK;
166 int printed = 0;
167 int cpu = smp_processor_id();
168
169 if(unlikely(in_interrupt())) { /* acquiring write lock in interrupt context, bad idea */
170 pdc_printf("write_lock caller: %s:%d, IRQs enabled,\n", bfile, bline);
171 BUG();
172 }
173
174 /* Note: if interrupts are disabled (which is most likely), the printk
175 will never show on the console. We might need a polling method to flush
176 the dmesg buffer anyhow. */
177
178retry:
179 _raw_spin_lock(&rw->lock);
180
181 if(rw->counter != 0) {
182 /* this basically never happens */
183 _raw_spin_unlock(&rw->lock);
184
185 stuck--;
186 if ((unlikely(stuck <= 0)) && (rw->counter < 0)) {
187 pdc_printf(
188 "%s:%d: write_lock stuck on writer"
189 " in %s at %p(%d) %ld ticks\n",
190 bfile, bline, current->comm, inline_pc,
191 cpu, jiffies - started);
192 stuck = INIT_STUCK;
193 printed = 1;
194 }
195 else if (unlikely(stuck <= 0)) {
196 pdc_printf(
197 "%s:%d: write_lock stuck on reader"
198 " in %s at %p(%d) %ld ticks\n",
199 bfile, bline, current->comm, inline_pc,
200 cpu, jiffies - started);
201 stuck = INIT_STUCK;
202 printed = 1;
203 }
204
205 while(rw->counter != 0);
206
207 goto retry;
208 }
209
210 /* got it. now leave without unlocking */
211 rw->counter = -1; /* remember we are locked */
212
213 if (unlikely(printed)) {
214 pdc_printf(
215 "%s:%d: write_lock grabbed in %s at %p(%d) %ld ticks\n",
216 bfile, bline, current->comm, inline_pc,
217 cpu, jiffies - started);
218 }
219}
220
221int _dbg_write_trylock(rwlock_t *rw, const char *bfile, int bline)
222{
223#if 0
224 void *inline_pc = __builtin_return_address(0);
225 int cpu = smp_processor_id();
226#endif
227
228 if(unlikely(in_interrupt())) { /* acquiring write lock in interrupt context, bad idea */
229 pdc_printf("write_lock caller: %s:%d, IRQs enabled,\n", bfile, bline);
230 BUG();
231 }
232
233 /* Note: if interrupts are disabled (which is most likely), the printk
234 will never show on the console. We might need a polling method to flush
235 the dmesg buffer anyhow. */
236
237 _raw_spin_lock(&rw->lock);
238
239 if(rw->counter != 0) {
240 /* this basically never happens */
241 _raw_spin_unlock(&rw->lock);
242 return 0;
243 }
244
245 /* got it. now leave without unlocking */
246 rw->counter = -1; /* remember we are locked */
247#if 0
248 pdc_printf("%s:%d: try write_lock grabbed in %s at %p(%d)\n",
249 bfile, bline, current->comm, inline_pc, cpu);
250#endif
251 return 1;
252}
253
254void _dbg_read_lock(rwlock_t * rw, const char *bfile, int bline)
255{
256#if 0
257 void *inline_pc = __builtin_return_address(0);
258 unsigned long started = jiffies;
259 int cpu = smp_processor_id();
260#endif
261 unsigned long flags;
262
263 local_irq_save(flags);
264 _raw_spin_lock(&rw->lock);
265
266 rw->counter++;
267#if 0
268 pdc_printf(
269 "%s:%d: read_lock grabbed in %s at %p(%d) %ld ticks\n",
270 bfile, bline, current->comm, inline_pc,
271 cpu, jiffies - started);
272#endif
273 _raw_spin_unlock(&rw->lock);
274 local_irq_restore(flags);
275}
276
277#endif /* CONFIG_DEBUG_RWLOCK */
diff --git a/arch/ppc/lib/Makefile b/arch/ppc/lib/Makefile
index 1c380e67d435..f1e1fb4144f0 100644
--- a/arch/ppc/lib/Makefile
+++ b/arch/ppc/lib/Makefile
@@ -4,6 +4,5 @@
4 4
5obj-y := checksum.o string.o strcase.o dec_and_lock.o div64.o 5obj-y := checksum.o string.o strcase.o dec_and_lock.o div64.o
6 6
7obj-$(CONFIG_SMP) += locks.o
8obj-$(CONFIG_8xx) += rheap.o 7obj-$(CONFIG_8xx) += rheap.o
9obj-$(CONFIG_CPM2) += rheap.o 8obj-$(CONFIG_CPM2) += rheap.o
diff --git a/arch/ppc/lib/dec_and_lock.c b/arch/ppc/lib/dec_and_lock.c
index 4ee888070d91..b18f0d9a00fc 100644
--- a/arch/ppc/lib/dec_and_lock.c
+++ b/arch/ppc/lib/dec_and_lock.c
@@ -11,14 +11,7 @@
11 * has a cmpxchg, and where atomic->value is an int holding 11 * has a cmpxchg, and where atomic->value is an int holding
12 * the value of the atomic (i.e. the high bits aren't used 12 * the value of the atomic (i.e. the high bits aren't used
13 * for a lock or anything like that). 13 * for a lock or anything like that).
14 *
15 * N.B. ATOMIC_DEC_AND_LOCK gets defined in include/linux/spinlock.h
16 * if spinlocks are empty and thus atomic_dec_and_lock is defined
17 * to be atomic_dec_and_test - in that case we don't need it
18 * defined here as well.
19 */ 14 */
20
21#ifndef ATOMIC_DEC_AND_LOCK
22int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock) 15int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock)
23{ 16{
24 int counter; 17 int counter;
@@ -43,4 +36,3 @@ int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock)
43} 36}
44 37
45EXPORT_SYMBOL(_atomic_dec_and_lock); 38EXPORT_SYMBOL(_atomic_dec_and_lock);
46#endif /* ATOMIC_DEC_AND_LOCK */
diff --git a/arch/ppc64/lib/dec_and_lock.c b/arch/ppc64/lib/dec_and_lock.c
index 6e8d8591708c..7b9d4da5cf92 100644
--- a/arch/ppc64/lib/dec_and_lock.c
+++ b/arch/ppc64/lib/dec_and_lock.c
@@ -20,14 +20,7 @@
20 * has a cmpxchg, and where atomic->value is an int holding 20 * has a cmpxchg, and where atomic->value is an int holding
21 * the value of the atomic (i.e. the high bits aren't used 21 * the value of the atomic (i.e. the high bits aren't used
22 * for a lock or anything like that). 22 * for a lock or anything like that).
23 *
24 * N.B. ATOMIC_DEC_AND_LOCK gets defined in include/linux/spinlock.h
25 * if spinlocks are empty and thus atomic_dec_and_lock is defined
26 * to be atomic_dec_and_test - in that case we don't need it
27 * defined here as well.
28 */ 23 */
29
30#ifndef ATOMIC_DEC_AND_LOCK
31int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock) 24int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock)
32{ 25{
33 int counter; 26 int counter;
@@ -52,4 +45,3 @@ int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock)
52} 45}
53 46
54EXPORT_SYMBOL(_atomic_dec_and_lock); 47EXPORT_SYMBOL(_atomic_dec_and_lock);
55#endif /* ATOMIC_DEC_AND_LOCK */
diff --git a/arch/ppc64/lib/locks.c b/arch/ppc64/lib/locks.c
index ef70ef91abe2..033643ab69e0 100644
--- a/arch/ppc64/lib/locks.c
+++ b/arch/ppc64/lib/locks.c
@@ -23,12 +23,12 @@
23/* waiting for a spinlock... */ 23/* waiting for a spinlock... */
24#if defined(CONFIG_PPC_SPLPAR) || defined(CONFIG_PPC_ISERIES) 24#if defined(CONFIG_PPC_SPLPAR) || defined(CONFIG_PPC_ISERIES)
25 25
26void __spin_yield(spinlock_t *lock) 26void __spin_yield(raw_spinlock_t *lock)
27{ 27{
28 unsigned int lock_value, holder_cpu, yield_count; 28 unsigned int lock_value, holder_cpu, yield_count;
29 struct paca_struct *holder_paca; 29 struct paca_struct *holder_paca;
30 30
31 lock_value = lock->lock; 31 lock_value = lock->slock;
32 if (lock_value == 0) 32 if (lock_value == 0)
33 return; 33 return;
34 holder_cpu = lock_value & 0xffff; 34 holder_cpu = lock_value & 0xffff;
@@ -38,7 +38,7 @@ void __spin_yield(spinlock_t *lock)
38 if ((yield_count & 1) == 0) 38 if ((yield_count & 1) == 0)
39 return; /* virtual cpu is currently running */ 39 return; /* virtual cpu is currently running */
40 rmb(); 40 rmb();
41 if (lock->lock != lock_value) 41 if (lock->slock != lock_value)
42 return; /* something has changed */ 42 return; /* something has changed */
43#ifdef CONFIG_PPC_ISERIES 43#ifdef CONFIG_PPC_ISERIES
44 HvCall2(HvCallBaseYieldProcessor, HvCall_YieldToProc, 44 HvCall2(HvCallBaseYieldProcessor, HvCall_YieldToProc,
@@ -54,7 +54,7 @@ void __spin_yield(spinlock_t *lock)
54 * This turns out to be the same for read and write locks, since 54 * This turns out to be the same for read and write locks, since
55 * we only know the holder if it is write-locked. 55 * we only know the holder if it is write-locked.
56 */ 56 */
57void __rw_yield(rwlock_t *rw) 57void __rw_yield(raw_rwlock_t *rw)
58{ 58{
59 int lock_value; 59 int lock_value;
60 unsigned int holder_cpu, yield_count; 60 unsigned int holder_cpu, yield_count;
@@ -82,9 +82,9 @@ void __rw_yield(rwlock_t *rw)
82} 82}
83#endif 83#endif
84 84
85void spin_unlock_wait(spinlock_t *lock) 85void __raw_spin_unlock_wait(raw_spinlock_t *lock)
86{ 86{
87 while (lock->lock) { 87 while (lock->slock) {
88 HMT_low(); 88 HMT_low();
89 if (SHARED_PROCESSOR) 89 if (SHARED_PROCESSOR)
90 __spin_yield(lock); 90 __spin_yield(lock);
@@ -92,4 +92,4 @@ void spin_unlock_wait(spinlock_t *lock)
92 HMT_medium(); 92 HMT_medium();
93} 93}
94 94
95EXPORT_SYMBOL(spin_unlock_wait); 95EXPORT_SYMBOL(__raw_spin_unlock_wait);
diff --git a/arch/s390/lib/spinlock.c b/arch/s390/lib/spinlock.c
index 888b5596c195..2dc14e9c8327 100644
--- a/arch/s390/lib/spinlock.c
+++ b/arch/s390/lib/spinlock.c
@@ -36,7 +36,7 @@ _diag44(void)
36} 36}
37 37
38void 38void
39_raw_spin_lock_wait(spinlock_t *lp, unsigned int pc) 39_raw_spin_lock_wait(raw_spinlock_t *lp, unsigned int pc)
40{ 40{
41 int count = spin_retry; 41 int count = spin_retry;
42 42
@@ -53,7 +53,7 @@ _raw_spin_lock_wait(spinlock_t *lp, unsigned int pc)
53EXPORT_SYMBOL(_raw_spin_lock_wait); 53EXPORT_SYMBOL(_raw_spin_lock_wait);
54 54
55int 55int
56_raw_spin_trylock_retry(spinlock_t *lp, unsigned int pc) 56_raw_spin_trylock_retry(raw_spinlock_t *lp, unsigned int pc)
57{ 57{
58 int count = spin_retry; 58 int count = spin_retry;
59 59
@@ -67,7 +67,7 @@ _raw_spin_trylock_retry(spinlock_t *lp, unsigned int pc)
67EXPORT_SYMBOL(_raw_spin_trylock_retry); 67EXPORT_SYMBOL(_raw_spin_trylock_retry);
68 68
69void 69void
70_raw_read_lock_wait(rwlock_t *rw) 70_raw_read_lock_wait(raw_rwlock_t *rw)
71{ 71{
72 unsigned int old; 72 unsigned int old;
73 int count = spin_retry; 73 int count = spin_retry;
@@ -86,7 +86,7 @@ _raw_read_lock_wait(rwlock_t *rw)
86EXPORT_SYMBOL(_raw_read_lock_wait); 86EXPORT_SYMBOL(_raw_read_lock_wait);
87 87
88int 88int
89_raw_read_trylock_retry(rwlock_t *rw) 89_raw_read_trylock_retry(raw_rwlock_t *rw)
90{ 90{
91 unsigned int old; 91 unsigned int old;
92 int count = spin_retry; 92 int count = spin_retry;
@@ -102,7 +102,7 @@ _raw_read_trylock_retry(rwlock_t *rw)
102EXPORT_SYMBOL(_raw_read_trylock_retry); 102EXPORT_SYMBOL(_raw_read_trylock_retry);
103 103
104void 104void
105_raw_write_lock_wait(rwlock_t *rw) 105_raw_write_lock_wait(raw_rwlock_t *rw)
106{ 106{
107 int count = spin_retry; 107 int count = spin_retry;
108 108
@@ -119,7 +119,7 @@ _raw_write_lock_wait(rwlock_t *rw)
119EXPORT_SYMBOL(_raw_write_lock_wait); 119EXPORT_SYMBOL(_raw_write_lock_wait);
120 120
121int 121int
122_raw_write_trylock_retry(rwlock_t *rw) 122_raw_write_trylock_retry(raw_rwlock_t *rw)
123{ 123{
124 int count = spin_retry; 124 int count = spin_retry;
125 125
diff --git a/arch/sparc/kernel/sparc_ksyms.c b/arch/sparc/kernel/sparc_ksyms.c
index 5d974a2b735a..f84809333624 100644
--- a/arch/sparc/kernel/sparc_ksyms.c
+++ b/arch/sparc/kernel/sparc_ksyms.c
@@ -114,17 +114,7 @@ DOT_ALIAS2(unsigned, urem, unsigned, unsigned)
114/* used by various drivers */ 114/* used by various drivers */
115EXPORT_SYMBOL(sparc_cpu_model); 115EXPORT_SYMBOL(sparc_cpu_model);
116EXPORT_SYMBOL(kernel_thread); 116EXPORT_SYMBOL(kernel_thread);
117#ifdef CONFIG_DEBUG_SPINLOCK
118#ifdef CONFIG_SMP 117#ifdef CONFIG_SMP
119EXPORT_SYMBOL(_do_spin_lock);
120EXPORT_SYMBOL(_do_spin_unlock);
121EXPORT_SYMBOL(_spin_trylock);
122EXPORT_SYMBOL(_do_read_lock);
123EXPORT_SYMBOL(_do_read_unlock);
124EXPORT_SYMBOL(_do_write_lock);
125EXPORT_SYMBOL(_do_write_unlock);
126#endif
127#else
128// XXX find what uses (or used) these. 118// XXX find what uses (or used) these.
129EXPORT_SYMBOL(___rw_read_enter); 119EXPORT_SYMBOL(___rw_read_enter);
130EXPORT_SYMBOL(___rw_read_exit); 120EXPORT_SYMBOL(___rw_read_exit);
diff --git a/arch/sparc/lib/Makefile b/arch/sparc/lib/Makefile
index 2296ff9dc47a..fa5006946062 100644
--- a/arch/sparc/lib/Makefile
+++ b/arch/sparc/lib/Makefile
@@ -9,5 +9,3 @@ lib-y := mul.o rem.o sdiv.o udiv.o umul.o urem.o ashrdi3.o memcpy.o memset.o \
9 strncpy_from_user.o divdi3.o udivdi3.o strlen_user.o \ 9 strncpy_from_user.o divdi3.o udivdi3.o strlen_user.o \
10 copy_user.o locks.o atomic.o atomic32.o bitops.o \ 10 copy_user.o locks.o atomic.o atomic32.o bitops.o \
11 lshrdi3.o ashldi3.o rwsem.o muldi3.o bitext.o 11 lshrdi3.o ashldi3.o rwsem.o muldi3.o bitext.o
12
13lib-$(CONFIG_DEBUG_SPINLOCK) += debuglocks.o
diff --git a/arch/sparc/lib/debuglocks.c b/arch/sparc/lib/debuglocks.c
deleted file mode 100644
index fb182352782c..000000000000
--- a/arch/sparc/lib/debuglocks.c
+++ /dev/null
@@ -1,202 +0,0 @@
1/* $Id: debuglocks.c,v 1.11 2001/09/20 00:35:31 davem Exp $
2 * debuglocks.c: Debugging versions of SMP locking primitives.
3 *
4 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1998-99 Anton Blanchard (anton@progsoc.uts.edu.au)
6 */
7
8#include <linux/kernel.h>
9#include <linux/sched.h>
10#include <linux/threads.h> /* For NR_CPUS */
11#include <linux/spinlock.h>
12#include <asm/psr.h>
13#include <asm/system.h>
14
15#ifdef CONFIG_SMP
16
17/* Some notes on how these debugging routines work. When a lock is acquired
18 * an extra debugging member lock->owner_pc is set to the caller of the lock
19 * acquisition routine. Right before releasing a lock, the debugging program
20 * counter is cleared to zero.
21 *
22 * Furthermore, since PC's are 4 byte aligned on Sparc, we stuff the CPU
23 * number of the owner in the lowest two bits.
24 */
25
26#define STORE_CALLER(A) __asm__ __volatile__("mov %%i7, %0" : "=r" (A));
27
28static inline void show(char *str, spinlock_t *lock, unsigned long caller)
29{
30 int cpu = smp_processor_id();
31
32 printk("%s(%p) CPU#%d stuck at %08lx, owner PC(%08lx):CPU(%lx)\n",str,
33 lock, cpu, caller, lock->owner_pc & ~3, lock->owner_pc & 3);
34}
35
36static inline void show_read(char *str, rwlock_t *lock, unsigned long caller)
37{
38 int cpu = smp_processor_id();
39
40 printk("%s(%p) CPU#%d stuck at %08lx, owner PC(%08lx):CPU(%lx)\n", str,
41 lock, cpu, caller, lock->owner_pc & ~3, lock->owner_pc & 3);
42}
43
44static inline void show_write(char *str, rwlock_t *lock, unsigned long caller)
45{
46 int cpu = smp_processor_id();
47 int i;
48
49 printk("%s(%p) CPU#%d stuck at %08lx, owner PC(%08lx):CPU(%lx)", str,
50 lock, cpu, caller, lock->owner_pc & ~3, lock->owner_pc & 3);
51
52 for(i = 0; i < NR_CPUS; i++)
53 printk(" reader[%d]=%08lx", i, lock->reader_pc[i]);
54
55 printk("\n");
56}
57
58#undef INIT_STUCK
59#define INIT_STUCK 100000000
60
61void _do_spin_lock(spinlock_t *lock, char *str)
62{
63 unsigned long caller;
64 unsigned long val;
65 int cpu = smp_processor_id();
66 int stuck = INIT_STUCK;
67
68 STORE_CALLER(caller);
69
70again:
71 __asm__ __volatile__("ldstub [%1], %0" : "=r" (val) : "r" (&(lock->lock)));
72 if(val) {
73 while(lock->lock) {
74 if (!--stuck) {
75 show(str, lock, caller);
76 stuck = INIT_STUCK;
77 }
78 barrier();
79 }
80 goto again;
81 }
82 lock->owner_pc = (cpu & 3) | (caller & ~3);
83}
84
85int _spin_trylock(spinlock_t *lock)
86{
87 unsigned long val;
88 unsigned long caller;
89 int cpu = smp_processor_id();
90
91 STORE_CALLER(caller);
92
93 __asm__ __volatile__("ldstub [%1], %0" : "=r" (val) : "r" (&(lock->lock)));
94 if(!val) {
95 /* We got it, record our identity for debugging. */
96 lock->owner_pc = (cpu & 3) | (caller & ~3);
97 }
98 return val == 0;
99}
100
101void _do_spin_unlock(spinlock_t *lock)
102{
103 lock->owner_pc = 0;
104 barrier();
105 lock->lock = 0;
106}
107
108void _do_read_lock(rwlock_t *rw, char *str)
109{
110 unsigned long caller;
111 unsigned long val;
112 int cpu = smp_processor_id();
113 int stuck = INIT_STUCK;
114
115 STORE_CALLER(caller);
116
117wlock_again:
118 __asm__ __volatile__("ldstub [%1 + 3], %0" : "=r" (val) : "r" (&(rw->lock)));
119 if(val) {
120 while(rw->lock & 0xff) {
121 if (!--stuck) {
122 show_read(str, rw, caller);
123 stuck = INIT_STUCK;
124 }
125 barrier();
126 }
127 goto wlock_again;
128 }
129
130 rw->reader_pc[cpu] = caller;
131 barrier();
132 rw->lock++;
133}
134
135void _do_read_unlock(rwlock_t *rw, char *str)
136{
137 unsigned long caller;
138 unsigned long val;
139 int cpu = smp_processor_id();
140 int stuck = INIT_STUCK;
141
142 STORE_CALLER(caller);
143
144wlock_again:
145 __asm__ __volatile__("ldstub [%1 + 3], %0" : "=r" (val) : "r" (&(rw->lock)));
146 if(val) {
147 while(rw->lock & 0xff) {
148 if (!--stuck) {
149 show_read(str, rw, caller);
150 stuck = INIT_STUCK;
151 }
152 barrier();
153 }
154 goto wlock_again;
155 }
156
157 rw->reader_pc[cpu] = 0;
158 barrier();
159 rw->lock -= 0x1ff;
160}
161
162void _do_write_lock(rwlock_t *rw, char *str)
163{
164 unsigned long caller;
165 unsigned long val;
166 int cpu = smp_processor_id();
167 int stuck = INIT_STUCK;
168
169 STORE_CALLER(caller);
170
171wlock_again:
172 __asm__ __volatile__("ldstub [%1 + 3], %0" : "=r" (val) : "r" (&(rw->lock)));
173 if(val) {
174wlock_wait:
175 while(rw->lock) {
176 if (!--stuck) {
177 show_write(str, rw, caller);
178 stuck = INIT_STUCK;
179 }
180 barrier();
181 }
182 goto wlock_again;
183 }
184
185 if (rw->lock & ~0xff) {
186 *(((unsigned char *)&rw->lock)+3) = 0;
187 barrier();
188 goto wlock_wait;
189 }
190
191 barrier();
192 rw->owner_pc = (cpu & 3) | (caller & ~3);
193}
194
195void _do_write_unlock(rwlock_t *rw)
196{
197 rw->owner_pc = 0;
198 barrier();
199 rw->lock = 0;
200}
201
202#endif /* SMP */
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index 66255434128a..7d10b0397091 100644
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -607,11 +607,6 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
607 struct thread_info *t = p->thread_info; 607 struct thread_info *t = p->thread_info;
608 char *child_trap_frame; 608 char *child_trap_frame;
609 609
610#ifdef CONFIG_DEBUG_SPINLOCK
611 p->thread.smp_lock_count = 0;
612 p->thread.smp_lock_pc = 0;
613#endif
614
615 /* Calculate offset to stack_frame & pt_regs */ 610 /* Calculate offset to stack_frame & pt_regs */
616 child_trap_frame = ((char *)t) + (THREAD_SIZE - (TRACEREG_SZ+STACKFRAME_SZ)); 611 child_trap_frame = ((char *)t) + (THREAD_SIZE - (TRACEREG_SZ+STACKFRAME_SZ));
617 memcpy(child_trap_frame, (((struct sparc_stackf *)regs)-1), (TRACEREG_SZ+STACKFRAME_SZ)); 612 memcpy(child_trap_frame, (((struct sparc_stackf *)regs)-1), (TRACEREG_SZ+STACKFRAME_SZ));
diff --git a/arch/sparc64/kernel/sparc64_ksyms.c b/arch/sparc64/kernel/sparc64_ksyms.c
index 7d9a0f6c437d..cbb5e59824e5 100644
--- a/arch/sparc64/kernel/sparc64_ksyms.c
+++ b/arch/sparc64/kernel/sparc64_ksyms.c
@@ -115,17 +115,12 @@ EXPORT_PER_CPU_SYMBOL(__cpu_data);
115 115
116/* used by various drivers */ 116/* used by various drivers */
117#ifdef CONFIG_SMP 117#ifdef CONFIG_SMP
118#ifndef CONFIG_DEBUG_SPINLOCK
119/* Out of line rw-locking implementation. */ 118/* Out of line rw-locking implementation. */
120EXPORT_SYMBOL(__read_lock); 119EXPORT_SYMBOL(__read_lock);
121EXPORT_SYMBOL(__read_unlock); 120EXPORT_SYMBOL(__read_unlock);
122EXPORT_SYMBOL(__write_lock); 121EXPORT_SYMBOL(__write_lock);
123EXPORT_SYMBOL(__write_unlock); 122EXPORT_SYMBOL(__write_unlock);
124EXPORT_SYMBOL(__write_trylock); 123EXPORT_SYMBOL(__write_trylock);
125/* Out of line spin-locking implementation. */
126EXPORT_SYMBOL(_raw_spin_lock);
127EXPORT_SYMBOL(_raw_spin_lock_flags);
128#endif
129 124
130/* Hard IRQ locking */ 125/* Hard IRQ locking */
131EXPORT_SYMBOL(synchronize_irq); 126EXPORT_SYMBOL(synchronize_irq);
diff --git a/arch/sparc64/lib/Makefile b/arch/sparc64/lib/Makefile
index 40dbeec7e5d6..d968aebe83b2 100644
--- a/arch/sparc64/lib/Makefile
+++ b/arch/sparc64/lib/Makefile
@@ -14,7 +14,6 @@ lib-y := PeeCeeI.o copy_page.o clear_page.o strlen.o strncmp.o \
14 copy_in_user.o user_fixup.o memmove.o \ 14 copy_in_user.o user_fixup.o memmove.o \
15 mcount.o ipcsum.o rwsem.o xor.o find_bit.o delay.o 15 mcount.o ipcsum.o rwsem.o xor.o find_bit.o delay.o
16 16
17lib-$(CONFIG_DEBUG_SPINLOCK) += debuglocks.o
18lib-$(CONFIG_HAVE_DEC_LOCK) += dec_and_lock.o 17lib-$(CONFIG_HAVE_DEC_LOCK) += dec_and_lock.o
19 18
20obj-y += iomap.o 19obj-y += iomap.o
diff --git a/arch/sparc64/lib/debuglocks.c b/arch/sparc64/lib/debuglocks.c
deleted file mode 100644
index f5f0b5586f01..000000000000
--- a/arch/sparc64/lib/debuglocks.c
+++ /dev/null
@@ -1,366 +0,0 @@
1/* $Id: debuglocks.c,v 1.9 2001/11/17 00:10:48 davem Exp $
2 * debuglocks.c: Debugging versions of SMP locking primitives.
3 *
4 * Copyright (C) 1998 David S. Miller (davem@redhat.com)
5 */
6
7#include <linux/config.h>
8#include <linux/kernel.h>
9#include <linux/sched.h>
10#include <linux/spinlock.h>
11#include <asm/system.h>
12
13#ifdef CONFIG_SMP
14
15static inline void show (char *str, spinlock_t *lock, unsigned long caller)
16{
17 int cpu = smp_processor_id();
18
19 printk("%s(%p) CPU#%d stuck at %08x, owner PC(%08x):CPU(%x)\n",
20 str, lock, cpu, (unsigned int) caller,
21 lock->owner_pc, lock->owner_cpu);
22}
23
24static inline void show_read (char *str, rwlock_t *lock, unsigned long caller)
25{
26 int cpu = smp_processor_id();
27
28 printk("%s(%p) CPU#%d stuck at %08x, writer PC(%08x):CPU(%x)\n",
29 str, lock, cpu, (unsigned int) caller,
30 lock->writer_pc, lock->writer_cpu);
31}
32
33static inline void show_write (char *str, rwlock_t *lock, unsigned long caller)
34{
35 int cpu = smp_processor_id();
36 int i;
37
38 printk("%s(%p) CPU#%d stuck at %08x\n",
39 str, lock, cpu, (unsigned int) caller);
40 printk("Writer: PC(%08x):CPU(%x)\n",
41 lock->writer_pc, lock->writer_cpu);
42 printk("Readers:");
43 for (i = 0; i < NR_CPUS; i++)
44 if (lock->reader_pc[i])
45 printk(" %d[%08x]", i, lock->reader_pc[i]);
46 printk("\n");
47}
48
49#undef INIT_STUCK
50#define INIT_STUCK 100000000
51
52void _do_spin_lock(spinlock_t *lock, char *str, unsigned long caller)
53{
54 unsigned long val;
55 int stuck = INIT_STUCK;
56 int cpu = get_cpu();
57 int shown = 0;
58
59again:
60 __asm__ __volatile__("ldstub [%1], %0"
61 : "=r" (val)
62 : "r" (&(lock->lock))
63 : "memory");
64 membar_storeload_storestore();
65 if (val) {
66 while (lock->lock) {
67 if (!--stuck) {
68 if (shown++ <= 2)
69 show(str, lock, caller);
70 stuck = INIT_STUCK;
71 }
72 rmb();
73 }
74 goto again;
75 }
76 lock->owner_pc = ((unsigned int)caller);
77 lock->owner_cpu = cpu;
78 current->thread.smp_lock_count++;
79 current->thread.smp_lock_pc = ((unsigned int)caller);
80
81 put_cpu();
82}
83
84int _do_spin_trylock(spinlock_t *lock, unsigned long caller)
85{
86 unsigned long val;
87 int cpu = get_cpu();
88
89 __asm__ __volatile__("ldstub [%1], %0"
90 : "=r" (val)
91 : "r" (&(lock->lock))
92 : "memory");
93 membar_storeload_storestore();
94 if (!val) {
95 lock->owner_pc = ((unsigned int)caller);
96 lock->owner_cpu = cpu;
97 current->thread.smp_lock_count++;
98 current->thread.smp_lock_pc = ((unsigned int)caller);
99 }
100
101 put_cpu();
102
103 return val == 0;
104}
105
106void _do_spin_unlock(spinlock_t *lock)
107{
108 lock->owner_pc = 0;
109 lock->owner_cpu = NO_PROC_ID;
110 membar_storestore_loadstore();
111 lock->lock = 0;
112 current->thread.smp_lock_count--;
113}
114
115/* Keep INIT_STUCK the same... */
116
117void _do_read_lock(rwlock_t *rw, char *str, unsigned long caller)
118{
119 unsigned long val;
120 int stuck = INIT_STUCK;
121 int cpu = get_cpu();
122 int shown = 0;
123
124wlock_again:
125 /* Wait for any writer to go away. */
126 while (((long)(rw->lock)) < 0) {
127 if (!--stuck) {
128 if (shown++ <= 2)
129 show_read(str, rw, caller);
130 stuck = INIT_STUCK;
131 }
132 rmb();
133 }
134 /* Try once to increment the counter. */
135 __asm__ __volatile__(
136" ldx [%0], %%g1\n"
137" brlz,a,pn %%g1, 2f\n"
138" mov 1, %0\n"
139" add %%g1, 1, %%g7\n"
140" casx [%0], %%g1, %%g7\n"
141" sub %%g1, %%g7, %0\n"
142"2:" : "=r" (val)
143 : "0" (&(rw->lock))
144 : "g1", "g7", "memory");
145 membar_storeload_storestore();
146 if (val)
147 goto wlock_again;
148 rw->reader_pc[cpu] = ((unsigned int)caller);
149 current->thread.smp_lock_count++;
150 current->thread.smp_lock_pc = ((unsigned int)caller);
151
152 put_cpu();
153}
154
155void _do_read_unlock(rwlock_t *rw, char *str, unsigned long caller)
156{
157 unsigned long val;
158 int stuck = INIT_STUCK;
159 int cpu = get_cpu();
160 int shown = 0;
161
162 /* Drop our identity _first_. */
163 rw->reader_pc[cpu] = 0;
164 current->thread.smp_lock_count--;
165runlock_again:
166 /* Spin trying to decrement the counter using casx. */
167 __asm__ __volatile__(
168" membar #StoreLoad | #LoadLoad\n"
169" ldx [%0], %%g1\n"
170" sub %%g1, 1, %%g7\n"
171" casx [%0], %%g1, %%g7\n"
172" membar #StoreLoad | #StoreStore\n"
173" sub %%g1, %%g7, %0\n"
174 : "=r" (val)
175 : "0" (&(rw->lock))
176 : "g1", "g7", "memory");
177 if (val) {
178 if (!--stuck) {
179 if (shown++ <= 2)
180 show_read(str, rw, caller);
181 stuck = INIT_STUCK;
182 }
183 goto runlock_again;
184 }
185
186 put_cpu();
187}
188
189void _do_write_lock(rwlock_t *rw, char *str, unsigned long caller)
190{
191 unsigned long val;
192 int stuck = INIT_STUCK;
193 int cpu = get_cpu();
194 int shown = 0;
195
196wlock_again:
197 /* Spin while there is another writer. */
198 while (((long)rw->lock) < 0) {
199 if (!--stuck) {
200 if (shown++ <= 2)
201 show_write(str, rw, caller);
202 stuck = INIT_STUCK;
203 }
204 rmb();
205 }
206
207 /* Try to acuire the write bit. */
208 __asm__ __volatile__(
209" mov 1, %%g3\n"
210" sllx %%g3, 63, %%g3\n"
211" ldx [%0], %%g1\n"
212" brlz,pn %%g1, 1f\n"
213" or %%g1, %%g3, %%g7\n"
214" casx [%0], %%g1, %%g7\n"
215" membar #StoreLoad | #StoreStore\n"
216" ba,pt %%xcc, 2f\n"
217" sub %%g1, %%g7, %0\n"
218"1: mov 1, %0\n"
219"2:" : "=r" (val)
220 : "0" (&(rw->lock))
221 : "g3", "g1", "g7", "memory");
222 if (val) {
223 /* We couldn't get the write bit. */
224 if (!--stuck) {
225 if (shown++ <= 2)
226 show_write(str, rw, caller);
227 stuck = INIT_STUCK;
228 }
229 goto wlock_again;
230 }
231 if ((rw->lock & ((1UL<<63)-1UL)) != 0UL) {
232 /* Readers still around, drop the write
233 * lock, spin, and try again.
234 */
235 if (!--stuck) {
236 if (shown++ <= 2)
237 show_write(str, rw, caller);
238 stuck = INIT_STUCK;
239 }
240 __asm__ __volatile__(
241" mov 1, %%g3\n"
242" sllx %%g3, 63, %%g3\n"
243"1: ldx [%0], %%g1\n"
244" andn %%g1, %%g3, %%g7\n"
245" casx [%0], %%g1, %%g7\n"
246" cmp %%g1, %%g7\n"
247" membar #StoreLoad | #StoreStore\n"
248" bne,pn %%xcc, 1b\n"
249" nop"
250 : /* no outputs */
251 : "r" (&(rw->lock))
252 : "g3", "g1", "g7", "cc", "memory");
253 while(rw->lock != 0) {
254 if (!--stuck) {
255 if (shown++ <= 2)
256 show_write(str, rw, caller);
257 stuck = INIT_STUCK;
258 }
259 rmb();
260 }
261 goto wlock_again;
262 }
263
264 /* We have it, say who we are. */
265 rw->writer_pc = ((unsigned int)caller);
266 rw->writer_cpu = cpu;
267 current->thread.smp_lock_count++;
268 current->thread.smp_lock_pc = ((unsigned int)caller);
269
270 put_cpu();
271}
272
273void _do_write_unlock(rwlock_t *rw, unsigned long caller)
274{
275 unsigned long val;
276 int stuck = INIT_STUCK;
277 int shown = 0;
278
279 /* Drop our identity _first_ */
280 rw->writer_pc = 0;
281 rw->writer_cpu = NO_PROC_ID;
282 current->thread.smp_lock_count--;
283wlock_again:
284 __asm__ __volatile__(
285" membar #StoreLoad | #LoadLoad\n"
286" mov 1, %%g3\n"
287" sllx %%g3, 63, %%g3\n"
288" ldx [%0], %%g1\n"
289" andn %%g1, %%g3, %%g7\n"
290" casx [%0], %%g1, %%g7\n"
291" membar #StoreLoad | #StoreStore\n"
292" sub %%g1, %%g7, %0\n"
293 : "=r" (val)
294 : "0" (&(rw->lock))
295 : "g3", "g1", "g7", "memory");
296 if (val) {
297 if (!--stuck) {
298 if (shown++ <= 2)
299 show_write("write_unlock", rw, caller);
300 stuck = INIT_STUCK;
301 }
302 goto wlock_again;
303 }
304}
305
306int _do_write_trylock(rwlock_t *rw, char *str, unsigned long caller)
307{
308 unsigned long val;
309 int cpu = get_cpu();
310
311 /* Try to acuire the write bit. */
312 __asm__ __volatile__(
313" mov 1, %%g3\n"
314" sllx %%g3, 63, %%g3\n"
315" ldx [%0], %%g1\n"
316" brlz,pn %%g1, 1f\n"
317" or %%g1, %%g3, %%g7\n"
318" casx [%0], %%g1, %%g7\n"
319" membar #StoreLoad | #StoreStore\n"
320" ba,pt %%xcc, 2f\n"
321" sub %%g1, %%g7, %0\n"
322"1: mov 1, %0\n"
323"2:" : "=r" (val)
324 : "0" (&(rw->lock))
325 : "g3", "g1", "g7", "memory");
326
327 if (val) {
328 put_cpu();
329 return 0;
330 }
331
332 if ((rw->lock & ((1UL<<63)-1UL)) != 0UL) {
333 /* Readers still around, drop the write
334 * lock, return failure.
335 */
336 __asm__ __volatile__(
337" mov 1, %%g3\n"
338" sllx %%g3, 63, %%g3\n"
339"1: ldx [%0], %%g1\n"
340" andn %%g1, %%g3, %%g7\n"
341" casx [%0], %%g1, %%g7\n"
342" cmp %%g1, %%g7\n"
343" membar #StoreLoad | #StoreStore\n"
344" bne,pn %%xcc, 1b\n"
345" nop"
346 : /* no outputs */
347 : "r" (&(rw->lock))
348 : "g3", "g1", "g7", "cc", "memory");
349
350 put_cpu();
351
352 return 0;
353 }
354
355 /* We have it, say who we are. */
356 rw->writer_pc = ((unsigned int)caller);
357 rw->writer_cpu = cpu;
358 current->thread.smp_lock_count++;
359 current->thread.smp_lock_pc = ((unsigned int)caller);
360
361 put_cpu();
362
363 return 1;
364}
365
366#endif /* CONFIG_SMP */
diff --git a/fs/buffer.c b/fs/buffer.c
index 1c62203a4906..6cbfceabd95d 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -40,6 +40,7 @@
40#include <linux/cpu.h> 40#include <linux/cpu.h>
41#include <linux/bitops.h> 41#include <linux/bitops.h>
42#include <linux/mpage.h> 42#include <linux/mpage.h>
43#include <linux/bit_spinlock.h>
43 44
44static int fsync_buffers_list(spinlock_t *lock, struct list_head *list); 45static int fsync_buffers_list(spinlock_t *lock, struct list_head *list);
45static void invalidate_bh_lrus(void); 46static void invalidate_bh_lrus(void);
diff --git a/include/asm-alpha/spinlock.h b/include/asm-alpha/spinlock.h
index 80780dba9986..8197c69eff44 100644
--- a/include/asm-alpha/spinlock.h
+++ b/include/asm-alpha/spinlock.h
@@ -6,7 +6,6 @@
6#include <linux/kernel.h> 6#include <linux/kernel.h>
7#include <asm/current.h> 7#include <asm/current.h>
8 8
9
10/* 9/*
11 * Simple spin lock operations. There are two variants, one clears IRQ's 10 * Simple spin lock operations. There are two variants, one clears IRQ's
12 * on the local processor, one does not. 11 * on the local processor, one does not.
@@ -14,43 +13,18 @@
14 * We make no fairness assumptions. They have a cost. 13 * We make no fairness assumptions. They have a cost.
15 */ 14 */
16 15
17typedef struct { 16#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
18 volatile unsigned int lock; 17#define __raw_spin_is_locked(x) ((x)->lock != 0)
19#ifdef CONFIG_DEBUG_SPINLOCK 18#define __raw_spin_unlock_wait(x) \
20 int on_cpu; 19 do { cpu_relax(); } while ((x)->lock)
21 int line_no; 20
22 void *previous; 21static inline void __raw_spin_unlock(raw_spinlock_t * lock)
23 struct task_struct * task;
24 const char *base_file;
25#endif
26} spinlock_t;
27
28#ifdef CONFIG_DEBUG_SPINLOCK
29#define SPIN_LOCK_UNLOCKED (spinlock_t){ 0, -1, 0, NULL, NULL, NULL }
30#else
31#define SPIN_LOCK_UNLOCKED (spinlock_t){ 0 }
32#endif
33
34#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while(0)
35#define spin_is_locked(x) ((x)->lock != 0)
36#define spin_unlock_wait(x) do { barrier(); } while ((x)->lock)
37
38#ifdef CONFIG_DEBUG_SPINLOCK
39extern void _raw_spin_unlock(spinlock_t * lock);
40extern void debug_spin_lock(spinlock_t * lock, const char *, int);
41extern int debug_spin_trylock(spinlock_t * lock, const char *, int);
42#define _raw_spin_lock(LOCK) \
43 debug_spin_lock(LOCK, __BASE_FILE__, __LINE__)
44#define _raw_spin_trylock(LOCK) \
45 debug_spin_trylock(LOCK, __BASE_FILE__, __LINE__)
46#else
47static inline void _raw_spin_unlock(spinlock_t * lock)
48{ 22{
49 mb(); 23 mb();
50 lock->lock = 0; 24 lock->lock = 0;
51} 25}
52 26
53static inline void _raw_spin_lock(spinlock_t * lock) 27static inline void __raw_spin_lock(raw_spinlock_t * lock)
54{ 28{
55 long tmp; 29 long tmp;
56 30
@@ -70,80 +44,64 @@ static inline void _raw_spin_lock(spinlock_t * lock)
70 : "m"(lock->lock) : "memory"); 44 : "m"(lock->lock) : "memory");
71} 45}
72 46
73static inline int _raw_spin_trylock(spinlock_t *lock) 47static inline int __raw_spin_trylock(raw_spinlock_t *lock)
74{ 48{
75 return !test_and_set_bit(0, &lock->lock); 49 return !test_and_set_bit(0, &lock->lock);
76} 50}
77#endif /* CONFIG_DEBUG_SPINLOCK */
78
79#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
80 51
81/***********************************************************/ 52/***********************************************************/
82 53
83typedef struct { 54static inline int __raw_read_can_lock(raw_rwlock_t *lock)
84 volatile unsigned int lock;
85} rwlock_t;
86
87#define RW_LOCK_UNLOCKED (rwlock_t){ 0 }
88
89#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while(0)
90
91static inline int read_can_lock(rwlock_t *lock)
92{ 55{
93 return (lock->lock & 1) == 0; 56 return (lock->lock & 1) == 0;
94} 57}
95 58
96static inline int write_can_lock(rwlock_t *lock) 59static inline int __raw_write_can_lock(raw_rwlock_t *lock)
97{ 60{
98 return lock->lock == 0; 61 return lock->lock == 0;
99} 62}
100 63
101#ifdef CONFIG_DEBUG_RWLOCK 64static inline void __raw_read_lock(raw_rwlock_t *lock)
102extern void _raw_write_lock(rwlock_t * lock);
103extern void _raw_read_lock(rwlock_t * lock);
104#else
105static inline void _raw_write_lock(rwlock_t * lock)
106{ 65{
107 long regx; 66 long regx;
108 67
109 __asm__ __volatile__( 68 __asm__ __volatile__(
110 "1: ldl_l %1,%0\n" 69 "1: ldl_l %1,%0\n"
111 " bne %1,6f\n" 70 " blbs %1,6f\n"
112 " lda %1,1\n" 71 " subl %1,2,%1\n"
113 " stl_c %1,%0\n" 72 " stl_c %1,%0\n"
114 " beq %1,6f\n" 73 " beq %1,6f\n"
115 " mb\n" 74 " mb\n"
116 ".subsection 2\n" 75 ".subsection 2\n"
117 "6: ldl %1,%0\n" 76 "6: ldl %1,%0\n"
118 " bne %1,6b\n" 77 " blbs %1,6b\n"
119 " br 1b\n" 78 " br 1b\n"
120 ".previous" 79 ".previous"
121 : "=m" (*lock), "=&r" (regx) 80 : "=m" (*lock), "=&r" (regx)
122 : "m" (*lock) : "memory"); 81 : "m" (*lock) : "memory");
123} 82}
124 83
125static inline void _raw_read_lock(rwlock_t * lock) 84static inline void __raw_write_lock(raw_rwlock_t *lock)
126{ 85{
127 long regx; 86 long regx;
128 87
129 __asm__ __volatile__( 88 __asm__ __volatile__(
130 "1: ldl_l %1,%0\n" 89 "1: ldl_l %1,%0\n"
131 " blbs %1,6f\n" 90 " bne %1,6f\n"
132 " subl %1,2,%1\n" 91 " lda %1,1\n"
133 " stl_c %1,%0\n" 92 " stl_c %1,%0\n"
134 " beq %1,6f\n" 93 " beq %1,6f\n"
135 " mb\n" 94 " mb\n"
136 ".subsection 2\n" 95 ".subsection 2\n"
137 "6: ldl %1,%0\n" 96 "6: ldl %1,%0\n"
138 " blbs %1,6b\n" 97 " bne %1,6b\n"
139 " br 1b\n" 98 " br 1b\n"
140 ".previous" 99 ".previous"
141 : "=m" (*lock), "=&r" (regx) 100 : "=m" (*lock), "=&r" (regx)
142 : "m" (*lock) : "memory"); 101 : "m" (*lock) : "memory");
143} 102}
144#endif /* CONFIG_DEBUG_RWLOCK */
145 103
146static inline int _raw_read_trylock(rwlock_t * lock) 104static inline int __raw_read_trylock(raw_rwlock_t * lock)
147{ 105{
148 long regx; 106 long regx;
149 int success; 107 int success;
@@ -165,7 +123,7 @@ static inline int _raw_read_trylock(rwlock_t * lock)
165 return success; 123 return success;
166} 124}
167 125
168static inline int _raw_write_trylock(rwlock_t * lock) 126static inline int __raw_write_trylock(raw_rwlock_t * lock)
169{ 127{
170 long regx; 128 long regx;
171 int success; 129 int success;
@@ -187,13 +145,7 @@ static inline int _raw_write_trylock(rwlock_t * lock)
187 return success; 145 return success;
188} 146}
189 147
190static inline void _raw_write_unlock(rwlock_t * lock) 148static inline void __raw_read_unlock(raw_rwlock_t * lock)
191{
192 mb();
193 lock->lock = 0;
194}
195
196static inline void _raw_read_unlock(rwlock_t * lock)
197{ 149{
198 long regx; 150 long regx;
199 __asm__ __volatile__( 151 __asm__ __volatile__(
@@ -209,4 +161,10 @@ static inline void _raw_read_unlock(rwlock_t * lock)
209 : "m" (*lock) : "memory"); 161 : "m" (*lock) : "memory");
210} 162}
211 163
164static inline void __raw_write_unlock(raw_rwlock_t * lock)
165{
166 mb();
167 lock->lock = 0;
168}
169
212#endif /* _ALPHA_SPINLOCK_H */ 170#endif /* _ALPHA_SPINLOCK_H */
diff --git a/include/asm-alpha/spinlock_types.h b/include/asm-alpha/spinlock_types.h
new file mode 100644
index 000000000000..8141eb5ebf0d
--- /dev/null
+++ b/include/asm-alpha/spinlock_types.h
@@ -0,0 +1,20 @@
1#ifndef _ALPHA_SPINLOCK_TYPES_H
2#define _ALPHA_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 volatile unsigned int lock;
10} raw_spinlock_t;
11
12#define __RAW_SPIN_LOCK_UNLOCKED { 0 }
13
14typedef struct {
15 volatile unsigned int lock;
16} raw_rwlock_t;
17
18#define __RAW_RW_LOCK_UNLOCKED { 0 }
19
20#endif
diff --git a/include/asm-arm/spinlock.h b/include/asm-arm/spinlock.h
index 1f906d09b688..cb4906b45555 100644
--- a/include/asm-arm/spinlock.h
+++ b/include/asm-arm/spinlock.h
@@ -16,21 +16,14 @@
16 * Unlocked value: 0 16 * Unlocked value: 0
17 * Locked value: 1 17 * Locked value: 1
18 */ 18 */
19typedef struct {
20 volatile unsigned int lock;
21#ifdef CONFIG_PREEMPT
22 unsigned int break_lock;
23#endif
24} spinlock_t;
25 19
26#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 } 20#define __raw_spin_is_locked(x) ((x)->lock != 0)
21#define __raw_spin_unlock_wait(lock) \
22 do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
27 23
28#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while (0) 24#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
29#define spin_is_locked(x) ((x)->lock != 0)
30#define spin_unlock_wait(x) do { barrier(); } while (spin_is_locked(x))
31#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
32 25
33static inline void _raw_spin_lock(spinlock_t *lock) 26static inline void __raw_spin_lock(raw_spinlock_t *lock)
34{ 27{
35 unsigned long tmp; 28 unsigned long tmp;
36 29
@@ -47,7 +40,7 @@ static inline void _raw_spin_lock(spinlock_t *lock)
47 smp_mb(); 40 smp_mb();
48} 41}
49 42
50static inline int _raw_spin_trylock(spinlock_t *lock) 43static inline int __raw_spin_trylock(raw_spinlock_t *lock)
51{ 44{
52 unsigned long tmp; 45 unsigned long tmp;
53 46
@@ -67,7 +60,7 @@ static inline int _raw_spin_trylock(spinlock_t *lock)
67 } 60 }
68} 61}
69 62
70static inline void _raw_spin_unlock(spinlock_t *lock) 63static inline void __raw_spin_unlock(raw_spinlock_t *lock)
71{ 64{
72 smp_mb(); 65 smp_mb();
73 66
@@ -80,23 +73,14 @@ static inline void _raw_spin_unlock(spinlock_t *lock)
80 73
81/* 74/*
82 * RWLOCKS 75 * RWLOCKS
83 */ 76 *
84typedef struct { 77 *
85 volatile unsigned int lock;
86#ifdef CONFIG_PREEMPT
87 unsigned int break_lock;
88#endif
89} rwlock_t;
90
91#define RW_LOCK_UNLOCKED (rwlock_t) { 0 }
92#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while (0)
93#define rwlock_is_locked(x) (*((volatile unsigned int *)(x)) != 0)
94
95/*
96 * Write locks are easy - we just set bit 31. When unlocking, we can 78 * Write locks are easy - we just set bit 31. When unlocking, we can
97 * just write zero since the lock is exclusively held. 79 * just write zero since the lock is exclusively held.
98 */ 80 */
99static inline void _raw_write_lock(rwlock_t *rw) 81#define rwlock_is_locked(x) (*((volatile unsigned int *)(x)) != 0)
82
83static inline void __raw_write_lock(rwlock_t *rw)
100{ 84{
101 unsigned long tmp; 85 unsigned long tmp;
102 86
@@ -113,7 +97,7 @@ static inline void _raw_write_lock(rwlock_t *rw)
113 smp_mb(); 97 smp_mb();
114} 98}
115 99
116static inline int _raw_write_trylock(rwlock_t *rw) 100static inline int __raw_write_trylock(rwlock_t *rw)
117{ 101{
118 unsigned long tmp; 102 unsigned long tmp;
119 103
@@ -133,7 +117,7 @@ static inline int _raw_write_trylock(rwlock_t *rw)
133 } 117 }
134} 118}
135 119
136static inline void _raw_write_unlock(rwlock_t *rw) 120static inline void __raw_write_unlock(raw_rwlock_t *rw)
137{ 121{
138 smp_mb(); 122 smp_mb();
139 123
@@ -156,7 +140,7 @@ static inline void _raw_write_unlock(rwlock_t *rw)
156 * currently active. However, we know we won't have any write 140 * currently active. However, we know we won't have any write
157 * locks. 141 * locks.
158 */ 142 */
159static inline void _raw_read_lock(rwlock_t *rw) 143static inline void __raw_read_lock(raw_rwlock_t *rw)
160{ 144{
161 unsigned long tmp, tmp2; 145 unsigned long tmp, tmp2;
162 146
@@ -173,7 +157,7 @@ static inline void _raw_read_lock(rwlock_t *rw)
173 smp_mb(); 157 smp_mb();
174} 158}
175 159
176static inline void _raw_read_unlock(rwlock_t *rw) 160static inline void __raw_read_unlock(rwlock_t *rw)
177{ 161{
178 unsigned long tmp, tmp2; 162 unsigned long tmp, tmp2;
179 163
@@ -190,6 +174,6 @@ static inline void _raw_read_unlock(rwlock_t *rw)
190 : "cc"); 174 : "cc");
191} 175}
192 176
193#define _raw_read_trylock(lock) generic_raw_read_trylock(lock) 177#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
194 178
195#endif /* __ASM_SPINLOCK_H */ 179#endif /* __ASM_SPINLOCK_H */
diff --git a/include/asm-arm/spinlock_types.h b/include/asm-arm/spinlock_types.h
new file mode 100644
index 000000000000..43e83f6d2ee5
--- /dev/null
+++ b/include/asm-arm/spinlock_types.h
@@ -0,0 +1,20 @@
1#ifndef __ASM_SPINLOCK_TYPES_H
2#define __ASM_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 volatile unsigned int lock;
10} raw_spinlock_t;
11
12#define __RAW_SPIN_LOCK_UNLOCKED { 0 }
13
14typedef struct {
15 volatile unsigned int lock;
16} raw_rwlock_t;
17
18#define __RAW_RW_LOCK_UNLOCKED { 0 }
19
20#endif
diff --git a/include/asm-i386/spinlock.h b/include/asm-i386/spinlock.h
index f9ff31f40036..23604350cdf4 100644
--- a/include/asm-i386/spinlock.h
+++ b/include/asm-i386/spinlock.h
@@ -7,46 +7,21 @@
7#include <linux/config.h> 7#include <linux/config.h>
8#include <linux/compiler.h> 8#include <linux/compiler.h>
9 9
10asmlinkage int printk(const char * fmt, ...)
11 __attribute__ ((format (printf, 1, 2)));
12
13/* 10/*
14 * Your basic SMP spinlocks, allowing only a single CPU anywhere 11 * Your basic SMP spinlocks, allowing only a single CPU anywhere
15 */ 12 *
16
17typedef struct {
18 volatile unsigned int slock;
19#ifdef CONFIG_DEBUG_SPINLOCK
20 unsigned magic;
21#endif
22#ifdef CONFIG_PREEMPT
23 unsigned int break_lock;
24#endif
25} spinlock_t;
26
27#define SPINLOCK_MAGIC 0xdead4ead
28
29#ifdef CONFIG_DEBUG_SPINLOCK
30#define SPINLOCK_MAGIC_INIT , SPINLOCK_MAGIC
31#else
32#define SPINLOCK_MAGIC_INIT /* */
33#endif
34
35#define SPIN_LOCK_UNLOCKED (spinlock_t) { 1 SPINLOCK_MAGIC_INIT }
36
37#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while(0)
38
39/*
40 * Simple spin lock operations. There are two variants, one clears IRQ's 13 * Simple spin lock operations. There are two variants, one clears IRQ's
41 * on the local processor, one does not. 14 * on the local processor, one does not.
42 * 15 *
43 * We make no fairness assumptions. They have a cost. 16 * We make no fairness assumptions. They have a cost.
17 *
18 * (the type definitions are in asm/spinlock_types.h)
44 */ 19 */
45 20
46#define spin_is_locked(x) (*(volatile signed char *)(&(x)->slock) <= 0) 21#define __raw_spin_is_locked(x) \
47#define spin_unlock_wait(x) do { barrier(); } while(spin_is_locked(x)) 22 (*(volatile signed char *)(&(x)->slock) <= 0)
48 23
49#define spin_lock_string \ 24#define __raw_spin_lock_string \
50 "\n1:\t" \ 25 "\n1:\t" \
51 "lock ; decb %0\n\t" \ 26 "lock ; decb %0\n\t" \
52 "jns 3f\n" \ 27 "jns 3f\n" \
@@ -57,7 +32,7 @@ typedef struct {
57 "jmp 1b\n" \ 32 "jmp 1b\n" \
58 "3:\n\t" 33 "3:\n\t"
59 34
60#define spin_lock_string_flags \ 35#define __raw_spin_lock_string_flags \
61 "\n1:\t" \ 36 "\n1:\t" \
62 "lock ; decb %0\n\t" \ 37 "lock ; decb %0\n\t" \
63 "jns 4f\n\t" \ 38 "jns 4f\n\t" \
@@ -73,86 +48,71 @@ typedef struct {
73 "jmp 1b\n" \ 48 "jmp 1b\n" \
74 "4:\n\t" 49 "4:\n\t"
75 50
51static inline void __raw_spin_lock(raw_spinlock_t *lock)
52{
53 __asm__ __volatile__(
54 __raw_spin_lock_string
55 :"=m" (lock->slock) : : "memory");
56}
57
58static inline void __raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long flags)
59{
60 __asm__ __volatile__(
61 __raw_spin_lock_string_flags
62 :"=m" (lock->slock) : "r" (flags) : "memory");
63}
64
65static inline int __raw_spin_trylock(raw_spinlock_t *lock)
66{
67 char oldval;
68 __asm__ __volatile__(
69 "xchgb %b0,%1"
70 :"=q" (oldval), "=m" (lock->slock)
71 :"0" (0) : "memory");
72 return oldval > 0;
73}
74
76/* 75/*
77 * This works. Despite all the confusion. 76 * __raw_spin_unlock based on writing $1 to the low byte.
78 * (except on PPro SMP or if we are using OOSTORE) 77 * This method works. Despite all the confusion.
78 * (except on PPro SMP or if we are using OOSTORE, so we use xchgb there)
79 * (PPro errata 66, 92) 79 * (PPro errata 66, 92)
80 */ 80 */
81 81
82#if !defined(CONFIG_X86_OOSTORE) && !defined(CONFIG_X86_PPRO_FENCE) 82#if !defined(CONFIG_X86_OOSTORE) && !defined(CONFIG_X86_PPRO_FENCE)
83 83
84#define spin_unlock_string \ 84#define __raw_spin_unlock_string \
85 "movb $1,%0" \ 85 "movb $1,%0" \
86 :"=m" (lock->slock) : : "memory" 86 :"=m" (lock->slock) : : "memory"
87 87
88 88
89static inline void _raw_spin_unlock(spinlock_t *lock) 89static inline void __raw_spin_unlock(raw_spinlock_t *lock)
90{ 90{
91#ifdef CONFIG_DEBUG_SPINLOCK
92 BUG_ON(lock->magic != SPINLOCK_MAGIC);
93 BUG_ON(!spin_is_locked(lock));
94#endif
95 __asm__ __volatile__( 91 __asm__ __volatile__(
96 spin_unlock_string 92 __raw_spin_unlock_string
97 ); 93 );
98} 94}
99 95
100#else 96#else
101 97
102#define spin_unlock_string \ 98#define __raw_spin_unlock_string \
103 "xchgb %b0, %1" \ 99 "xchgb %b0, %1" \
104 :"=q" (oldval), "=m" (lock->slock) \ 100 :"=q" (oldval), "=m" (lock->slock) \
105 :"0" (oldval) : "memory" 101 :"0" (oldval) : "memory"
106 102
107static inline void _raw_spin_unlock(spinlock_t *lock) 103static inline void __raw_spin_unlock(raw_spinlock_t *lock)
108{ 104{
109 char oldval = 1; 105 char oldval = 1;
110#ifdef CONFIG_DEBUG_SPINLOCK
111 BUG_ON(lock->magic != SPINLOCK_MAGIC);
112 BUG_ON(!spin_is_locked(lock));
113#endif
114 __asm__ __volatile__(
115 spin_unlock_string
116 );
117}
118 106
119#endif
120
121static inline int _raw_spin_trylock(spinlock_t *lock)
122{
123 char oldval;
124 __asm__ __volatile__( 107 __asm__ __volatile__(
125 "xchgb %b0,%1" 108 __raw_spin_unlock_string
126 :"=q" (oldval), "=m" (lock->slock) 109 );
127 :"0" (0) : "memory");
128 return oldval > 0;
129} 110}
130 111
131static inline void _raw_spin_lock(spinlock_t *lock)
132{
133#ifdef CONFIG_DEBUG_SPINLOCK
134 if (unlikely(lock->magic != SPINLOCK_MAGIC)) {
135 printk("eip: %p\n", __builtin_return_address(0));
136 BUG();
137 }
138#endif 112#endif
139 __asm__ __volatile__(
140 spin_lock_string
141 :"=m" (lock->slock) : : "memory");
142}
143 113
144static inline void _raw_spin_lock_flags (spinlock_t *lock, unsigned long flags) 114#define __raw_spin_unlock_wait(lock) \
145{ 115 do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
146#ifdef CONFIG_DEBUG_SPINLOCK
147 if (unlikely(lock->magic != SPINLOCK_MAGIC)) {
148 printk("eip: %p\n", __builtin_return_address(0));
149 BUG();
150 }
151#endif
152 __asm__ __volatile__(
153 spin_lock_string_flags
154 :"=m" (lock->slock) : "r" (flags) : "memory");
155}
156 116
157/* 117/*
158 * Read-write spinlocks, allowing multiple readers 118 * Read-write spinlocks, allowing multiple readers
@@ -163,72 +123,41 @@ static inline void _raw_spin_lock_flags (spinlock_t *lock, unsigned long flags)
163 * can "mix" irq-safe locks - any writer needs to get a 123 * can "mix" irq-safe locks - any writer needs to get a
164 * irq-safe write-lock, but readers can get non-irqsafe 124 * irq-safe write-lock, but readers can get non-irqsafe
165 * read-locks. 125 * read-locks.
126 *
127 * On x86, we implement read-write locks as a 32-bit counter
128 * with the high bit (sign) being the "contended" bit.
129 *
130 * The inline assembly is non-obvious. Think about it.
131 *
132 * Changed to use the same technique as rw semaphores. See
133 * semaphore.h for details. -ben
134 *
135 * the helpers are in arch/i386/kernel/semaphore.c
166 */ 136 */
167typedef struct {
168 volatile unsigned int lock;
169#ifdef CONFIG_DEBUG_SPINLOCK
170 unsigned magic;
171#endif
172#ifdef CONFIG_PREEMPT
173 unsigned int break_lock;
174#endif
175} rwlock_t;
176
177#define RWLOCK_MAGIC 0xdeaf1eed
178
179#ifdef CONFIG_DEBUG_SPINLOCK
180#define RWLOCK_MAGIC_INIT , RWLOCK_MAGIC
181#else
182#define RWLOCK_MAGIC_INIT /* */
183#endif
184
185#define RW_LOCK_UNLOCKED (rwlock_t) { RW_LOCK_BIAS RWLOCK_MAGIC_INIT }
186
187#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while(0)
188 137
189/** 138/**
190 * read_can_lock - would read_trylock() succeed? 139 * read_can_lock - would read_trylock() succeed?
191 * @lock: the rwlock in question. 140 * @lock: the rwlock in question.
192 */ 141 */
193#define read_can_lock(x) ((int)(x)->lock > 0) 142#define __raw_read_can_lock(x) ((int)(x)->lock > 0)
194 143
195/** 144/**
196 * write_can_lock - would write_trylock() succeed? 145 * write_can_lock - would write_trylock() succeed?
197 * @lock: the rwlock in question. 146 * @lock: the rwlock in question.
198 */ 147 */
199#define write_can_lock(x) ((x)->lock == RW_LOCK_BIAS) 148#define __raw_write_can_lock(x) ((x)->lock == RW_LOCK_BIAS)
200 149
201/* 150static inline void __raw_read_lock(raw_rwlock_t *rw)
202 * On x86, we implement read-write locks as a 32-bit counter
203 * with the high bit (sign) being the "contended" bit.
204 *
205 * The inline assembly is non-obvious. Think about it.
206 *
207 * Changed to use the same technique as rw semaphores. See
208 * semaphore.h for details. -ben
209 */
210/* the spinlock helpers are in arch/i386/kernel/semaphore.c */
211
212static inline void _raw_read_lock(rwlock_t *rw)
213{ 151{
214#ifdef CONFIG_DEBUG_SPINLOCK
215 BUG_ON(rw->magic != RWLOCK_MAGIC);
216#endif
217 __build_read_lock(rw, "__read_lock_failed"); 152 __build_read_lock(rw, "__read_lock_failed");
218} 153}
219 154
220static inline void _raw_write_lock(rwlock_t *rw) 155static inline void __raw_write_lock(raw_rwlock_t *rw)
221{ 156{
222#ifdef CONFIG_DEBUG_SPINLOCK
223 BUG_ON(rw->magic != RWLOCK_MAGIC);
224#endif
225 __build_write_lock(rw, "__write_lock_failed"); 157 __build_write_lock(rw, "__write_lock_failed");
226} 158}
227 159
228#define _raw_read_unlock(rw) asm volatile("lock ; incl %0" :"=m" ((rw)->lock) : : "memory") 160static inline int __raw_read_trylock(raw_rwlock_t *lock)
229#define _raw_write_unlock(rw) asm volatile("lock ; addl $" RW_LOCK_BIAS_STR ",%0":"=m" ((rw)->lock) : : "memory")
230
231static inline int _raw_read_trylock(rwlock_t *lock)
232{ 161{
233 atomic_t *count = (atomic_t *)lock; 162 atomic_t *count = (atomic_t *)lock;
234 atomic_dec(count); 163 atomic_dec(count);
@@ -238,7 +167,7 @@ static inline int _raw_read_trylock(rwlock_t *lock)
238 return 0; 167 return 0;
239} 168}
240 169
241static inline int _raw_write_trylock(rwlock_t *lock) 170static inline int __raw_write_trylock(raw_rwlock_t *lock)
242{ 171{
243 atomic_t *count = (atomic_t *)lock; 172 atomic_t *count = (atomic_t *)lock;
244 if (atomic_sub_and_test(RW_LOCK_BIAS, count)) 173 if (atomic_sub_and_test(RW_LOCK_BIAS, count))
@@ -247,4 +176,15 @@ static inline int _raw_write_trylock(rwlock_t *lock)
247 return 0; 176 return 0;
248} 177}
249 178
179static inline void __raw_read_unlock(raw_rwlock_t *rw)
180{
181 asm volatile("lock ; incl %0" :"=m" (rw->lock) : : "memory");
182}
183
184static inline void __raw_write_unlock(raw_rwlock_t *rw)
185{
186 asm volatile("lock ; addl $" RW_LOCK_BIAS_STR ", %0"
187 : "=m" (rw->lock) : : "memory");
188}
189
250#endif /* __ASM_SPINLOCK_H */ 190#endif /* __ASM_SPINLOCK_H */
diff --git a/include/asm-i386/spinlock_types.h b/include/asm-i386/spinlock_types.h
new file mode 100644
index 000000000000..59efe849f351
--- /dev/null
+++ b/include/asm-i386/spinlock_types.h
@@ -0,0 +1,20 @@
1#ifndef __ASM_SPINLOCK_TYPES_H
2#define __ASM_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 volatile unsigned int slock;
10} raw_spinlock_t;
11
12#define __RAW_SPIN_LOCK_UNLOCKED { 1 }
13
14typedef struct {
15 volatile unsigned int lock;
16} raw_rwlock_t;
17
18#define __RAW_RW_LOCK_UNLOCKED { RW_LOCK_BIAS }
19
20#endif
diff --git a/include/asm-ia64/spinlock.h b/include/asm-ia64/spinlock.h
index d2430aa0d49d..5b78611411c3 100644
--- a/include/asm-ia64/spinlock.h
+++ b/include/asm-ia64/spinlock.h
@@ -17,28 +17,20 @@
17#include <asm/intrinsics.h> 17#include <asm/intrinsics.h>
18#include <asm/system.h> 18#include <asm/system.h>
19 19
20typedef struct { 20#define __raw_spin_lock_init(x) ((x)->lock = 0)
21 volatile unsigned int lock;
22#ifdef CONFIG_PREEMPT
23 unsigned int break_lock;
24#endif
25} spinlock_t;
26
27#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 }
28#define spin_lock_init(x) ((x)->lock = 0)
29 21
30#ifdef ASM_SUPPORTED 22#ifdef ASM_SUPPORTED
31/* 23/*
32 * Try to get the lock. If we fail to get the lock, make a non-standard call to 24 * Try to get the lock. If we fail to get the lock, make a non-standard call to
33 * ia64_spinlock_contention(). We do not use a normal call because that would force all 25 * ia64_spinlock_contention(). We do not use a normal call because that would force all
34 * callers of spin_lock() to be non-leaf routines. Instead, ia64_spinlock_contention() is 26 * callers of __raw_spin_lock() to be non-leaf routines. Instead, ia64_spinlock_contention() is
35 * carefully coded to touch only those registers that spin_lock() marks "clobbered". 27 * carefully coded to touch only those registers that __raw_spin_lock() marks "clobbered".
36 */ 28 */
37 29
38#define IA64_SPINLOCK_CLOBBERS "ar.ccv", "ar.pfs", "p14", "p15", "r27", "r28", "r29", "r30", "b6", "memory" 30#define IA64_SPINLOCK_CLOBBERS "ar.ccv", "ar.pfs", "p14", "p15", "r27", "r28", "r29", "r30", "b6", "memory"
39 31
40static inline void 32static inline void
41_raw_spin_lock_flags (spinlock_t *lock, unsigned long flags) 33__raw_spin_lock_flags (raw_spinlock_t *lock, unsigned long flags)
42{ 34{
43 register volatile unsigned int *ptr asm ("r31") = &lock->lock; 35 register volatile unsigned int *ptr asm ("r31") = &lock->lock;
44 36
@@ -94,17 +86,17 @@ _raw_spin_lock_flags (spinlock_t *lock, unsigned long flags)
94#endif 86#endif
95} 87}
96 88
97#define _raw_spin_lock(lock) _raw_spin_lock_flags(lock, 0) 89#define __raw_spin_lock(lock) __raw_spin_lock_flags(lock, 0)
98 90
99/* Unlock by doing an ordered store and releasing the cacheline with nta */ 91/* Unlock by doing an ordered store and releasing the cacheline with nta */
100static inline void _raw_spin_unlock(spinlock_t *x) { 92static inline void __raw_spin_unlock(raw_spinlock_t *x) {
101 barrier(); 93 barrier();
102 asm volatile ("st4.rel.nta [%0] = r0\n\t" :: "r"(x)); 94 asm volatile ("st4.rel.nta [%0] = r0\n\t" :: "r"(x));
103} 95}
104 96
105#else /* !ASM_SUPPORTED */ 97#else /* !ASM_SUPPORTED */
106#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock) 98#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
107# define _raw_spin_lock(x) \ 99# define __raw_spin_lock(x) \
108do { \ 100do { \
109 __u32 *ia64_spinlock_ptr = (__u32 *) (x); \ 101 __u32 *ia64_spinlock_ptr = (__u32 *) (x); \
110 __u64 ia64_spinlock_val; \ 102 __u64 ia64_spinlock_val; \
@@ -117,29 +109,20 @@ do { \
117 } while (ia64_spinlock_val); \ 109 } while (ia64_spinlock_val); \
118 } \ 110 } \
119} while (0) 111} while (0)
120#define _raw_spin_unlock(x) do { barrier(); ((spinlock_t *) x)->lock = 0; } while (0) 112#define __raw_spin_unlock(x) do { barrier(); ((raw_spinlock_t *) x)->lock = 0; } while (0)
121#endif /* !ASM_SUPPORTED */ 113#endif /* !ASM_SUPPORTED */
122 114
123#define spin_is_locked(x) ((x)->lock != 0) 115#define __raw_spin_is_locked(x) ((x)->lock != 0)
124#define _raw_spin_trylock(x) (cmpxchg_acq(&(x)->lock, 0, 1) == 0) 116#define __raw_spin_trylock(x) (cmpxchg_acq(&(x)->lock, 0, 1) == 0)
125#define spin_unlock_wait(x) do { barrier(); } while ((x)->lock) 117#define __raw_spin_unlock_wait(lock) \
126 118 do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
127typedef struct {
128 volatile unsigned int read_counter : 24;
129 volatile unsigned int write_lock : 8;
130#ifdef CONFIG_PREEMPT
131 unsigned int break_lock;
132#endif
133} rwlock_t;
134#define RW_LOCK_UNLOCKED (rwlock_t) { 0, 0 }
135 119
136#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while(0) 120#define __raw_read_can_lock(rw) (*(volatile int *)(rw) >= 0)
137#define read_can_lock(rw) (*(volatile int *)(rw) >= 0) 121#define __raw_write_can_lock(rw) (*(volatile int *)(rw) == 0)
138#define write_can_lock(rw) (*(volatile int *)(rw) == 0)
139 122
140#define _raw_read_lock(rw) \ 123#define __raw_read_lock(rw) \
141do { \ 124do { \
142 rwlock_t *__read_lock_ptr = (rw); \ 125 raw_rwlock_t *__read_lock_ptr = (rw); \
143 \ 126 \
144 while (unlikely(ia64_fetchadd(1, (int *) __read_lock_ptr, acq) < 0)) { \ 127 while (unlikely(ia64_fetchadd(1, (int *) __read_lock_ptr, acq) < 0)) { \
145 ia64_fetchadd(-1, (int *) __read_lock_ptr, rel); \ 128 ia64_fetchadd(-1, (int *) __read_lock_ptr, rel); \
@@ -148,14 +131,14 @@ do { \
148 } \ 131 } \
149} while (0) 132} while (0)
150 133
151#define _raw_read_unlock(rw) \ 134#define __raw_read_unlock(rw) \
152do { \ 135do { \
153 rwlock_t *__read_lock_ptr = (rw); \ 136 raw_rwlock_t *__read_lock_ptr = (rw); \
154 ia64_fetchadd(-1, (int *) __read_lock_ptr, rel); \ 137 ia64_fetchadd(-1, (int *) __read_lock_ptr, rel); \
155} while (0) 138} while (0)
156 139
157#ifdef ASM_SUPPORTED 140#ifdef ASM_SUPPORTED
158#define _raw_write_lock(rw) \ 141#define __raw_write_lock(rw) \
159do { \ 142do { \
160 __asm__ __volatile__ ( \ 143 __asm__ __volatile__ ( \
161 "mov ar.ccv = r0\n" \ 144 "mov ar.ccv = r0\n" \
@@ -170,7 +153,7 @@ do { \
170 :: "r"(rw) : "ar.ccv", "p7", "r2", "r29", "memory"); \ 153 :: "r"(rw) : "ar.ccv", "p7", "r2", "r29", "memory"); \
171} while(0) 154} while(0)
172 155
173#define _raw_write_trylock(rw) \ 156#define __raw_write_trylock(rw) \
174({ \ 157({ \
175 register long result; \ 158 register long result; \
176 \ 159 \
@@ -182,7 +165,7 @@ do { \
182 (result == 0); \ 165 (result == 0); \
183}) 166})
184 167
185static inline void _raw_write_unlock(rwlock_t *x) 168static inline void __raw_write_unlock(raw_rwlock_t *x)
186{ 169{
187 u8 *y = (u8 *)x; 170 u8 *y = (u8 *)x;
188 barrier(); 171 barrier();
@@ -191,7 +174,7 @@ static inline void _raw_write_unlock(rwlock_t *x)
191 174
192#else /* !ASM_SUPPORTED */ 175#else /* !ASM_SUPPORTED */
193 176
194#define _raw_write_lock(l) \ 177#define __raw_write_lock(l) \
195({ \ 178({ \
196 __u64 ia64_val, ia64_set_val = ia64_dep_mi(-1, 0, 31, 1); \ 179 __u64 ia64_val, ia64_set_val = ia64_dep_mi(-1, 0, 31, 1); \
197 __u32 *ia64_write_lock_ptr = (__u32 *) (l); \ 180 __u32 *ia64_write_lock_ptr = (__u32 *) (l); \
@@ -202,7 +185,7 @@ static inline void _raw_write_unlock(rwlock_t *x)
202 } while (ia64_val); \ 185 } while (ia64_val); \
203}) 186})
204 187
205#define _raw_write_trylock(rw) \ 188#define __raw_write_trylock(rw) \
206({ \ 189({ \
207 __u64 ia64_val; \ 190 __u64 ia64_val; \
208 __u64 ia64_set_val = ia64_dep_mi(-1, 0, 31,1); \ 191 __u64 ia64_set_val = ia64_dep_mi(-1, 0, 31,1); \
@@ -210,7 +193,7 @@ static inline void _raw_write_unlock(rwlock_t *x)
210 (ia64_val == 0); \ 193 (ia64_val == 0); \
211}) 194})
212 195
213static inline void _raw_write_unlock(rwlock_t *x) 196static inline void __raw_write_unlock(raw_rwlock_t *x)
214{ 197{
215 barrier(); 198 barrier();
216 x->write_lock = 0; 199 x->write_lock = 0;
@@ -218,6 +201,6 @@ static inline void _raw_write_unlock(rwlock_t *x)
218 201
219#endif /* !ASM_SUPPORTED */ 202#endif /* !ASM_SUPPORTED */
220 203
221#define _raw_read_trylock(lock) generic_raw_read_trylock(lock) 204#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
222 205
223#endif /* _ASM_IA64_SPINLOCK_H */ 206#endif /* _ASM_IA64_SPINLOCK_H */
diff --git a/include/asm-ia64/spinlock_types.h b/include/asm-ia64/spinlock_types.h
new file mode 100644
index 000000000000..474e46f1ab4a
--- /dev/null
+++ b/include/asm-ia64/spinlock_types.h
@@ -0,0 +1,21 @@
1#ifndef _ASM_IA64_SPINLOCK_TYPES_H
2#define _ASM_IA64_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 volatile unsigned int lock;
10} raw_spinlock_t;
11
12#define __RAW_SPIN_LOCK_UNLOCKED { 0 }
13
14typedef struct {
15 volatile unsigned int read_counter : 31;
16 volatile unsigned int write_lock : 1;
17} raw_rwlock_t;
18
19#define __RAW_RW_LOCK_UNLOCKED { 0, 0 }
20
21#endif
diff --git a/include/asm-m32r/spinlock.h b/include/asm-m32r/spinlock.h
index 6608d8371c50..7de7def28da9 100644
--- a/include/asm-m32r/spinlock.h
+++ b/include/asm-m32r/spinlock.h
@@ -14,57 +14,30 @@
14#include <asm/atomic.h> 14#include <asm/atomic.h>
15#include <asm/page.h> 15#include <asm/page.h>
16 16
17extern int printk(const char * fmt, ...)
18 __attribute__ ((format (printf, 1, 2)));
19
20#define RW_LOCK_BIAS 0x01000000
21#define RW_LOCK_BIAS_STR "0x01000000"
22
23/* 17/*
24 * Your basic SMP spinlocks, allowing only a single CPU anywhere 18 * Your basic SMP spinlocks, allowing only a single CPU anywhere
25 */ 19 *
26 20 * (the type definitions are in asm/spinlock_types.h)
27typedef struct { 21 *
28 volatile int slock;
29#ifdef CONFIG_DEBUG_SPINLOCK
30 unsigned magic;
31#endif
32#ifdef CONFIG_PREEMPT
33 unsigned int break_lock;
34#endif
35} spinlock_t;
36
37#define SPINLOCK_MAGIC 0xdead4ead
38
39#ifdef CONFIG_DEBUG_SPINLOCK
40#define SPINLOCK_MAGIC_INIT , SPINLOCK_MAGIC
41#else
42#define SPINLOCK_MAGIC_INIT /* */
43#endif
44
45#define SPIN_LOCK_UNLOCKED (spinlock_t) { 1 SPINLOCK_MAGIC_INIT }
46
47#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while(0)
48
49/*
50 * Simple spin lock operations. There are two variants, one clears IRQ's 22 * Simple spin lock operations. There are two variants, one clears IRQ's
51 * on the local processor, one does not. 23 * on the local processor, one does not.
52 * 24 *
53 * We make no fairness assumptions. They have a cost. 25 * We make no fairness assumptions. They have a cost.
54 */ 26 */
55 27
56#define spin_is_locked(x) (*(volatile int *)(&(x)->slock) <= 0) 28#define __raw_spin_is_locked(x) (*(volatile int *)(&(x)->slock) <= 0)
57#define spin_unlock_wait(x) do { barrier(); } while(spin_is_locked(x)) 29#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
58#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock) 30#define __raw_spin_unlock_wait(x) \
31 do { cpu_relax(); } while (__raw_spin_is_locked(x))
59 32
60/** 33/**
61 * _raw_spin_trylock - Try spin lock and return a result 34 * __raw_spin_trylock - Try spin lock and return a result
62 * @lock: Pointer to the lock variable 35 * @lock: Pointer to the lock variable
63 * 36 *
64 * _raw_spin_trylock() tries to get the lock and returns a result. 37 * __raw_spin_trylock() tries to get the lock and returns a result.
65 * On the m32r, the result value is 1 (= Success) or 0 (= Failure). 38 * On the m32r, the result value is 1 (= Success) or 0 (= Failure).
66 */ 39 */
67static inline int _raw_spin_trylock(spinlock_t *lock) 40static inline int __raw_spin_trylock(raw_spinlock_t *lock)
68{ 41{
69 int oldval; 42 int oldval;
70 unsigned long tmp1, tmp2; 43 unsigned long tmp1, tmp2;
@@ -78,7 +51,7 @@ static inline int _raw_spin_trylock(spinlock_t *lock)
78 * } 51 * }
79 */ 52 */
80 __asm__ __volatile__ ( 53 __asm__ __volatile__ (
81 "# spin_trylock \n\t" 54 "# __raw_spin_trylock \n\t"
82 "ldi %1, #0; \n\t" 55 "ldi %1, #0; \n\t"
83 "mvfc %2, psw; \n\t" 56 "mvfc %2, psw; \n\t"
84 "clrpsw #0x40 -> nop; \n\t" 57 "clrpsw #0x40 -> nop; \n\t"
@@ -97,16 +70,10 @@ static inline int _raw_spin_trylock(spinlock_t *lock)
97 return (oldval > 0); 70 return (oldval > 0);
98} 71}
99 72
100static inline void _raw_spin_lock(spinlock_t *lock) 73static inline void __raw_spin_lock(raw_spinlock_t *lock)
101{ 74{
102 unsigned long tmp0, tmp1; 75 unsigned long tmp0, tmp1;
103 76
104#ifdef CONFIG_DEBUG_SPINLOCK
105 if (unlikely(lock->magic != SPINLOCK_MAGIC)) {
106 printk("pc: %p\n", __builtin_return_address(0));
107 BUG();
108 }
109#endif
110 /* 77 /*
111 * lock->slock : =1 : unlock 78 * lock->slock : =1 : unlock
112 * : <=0 : lock 79 * : <=0 : lock
@@ -118,7 +85,7 @@ static inline void _raw_spin_lock(spinlock_t *lock)
118 * } 85 * }
119 */ 86 */
120 __asm__ __volatile__ ( 87 __asm__ __volatile__ (
121 "# spin_lock \n\t" 88 "# __raw_spin_lock \n\t"
122 ".fillinsn \n" 89 ".fillinsn \n"
123 "1: \n\t" 90 "1: \n\t"
124 "mvfc %1, psw; \n\t" 91 "mvfc %1, psw; \n\t"
@@ -145,12 +112,8 @@ static inline void _raw_spin_lock(spinlock_t *lock)
145 ); 112 );
146} 113}
147 114
148static inline void _raw_spin_unlock(spinlock_t *lock) 115static inline void __raw_spin_unlock(raw_spinlock_t *lock)
149{ 116{
150#ifdef CONFIG_DEBUG_SPINLOCK
151 BUG_ON(lock->magic != SPINLOCK_MAGIC);
152 BUG_ON(!spin_is_locked(lock));
153#endif
154 mb(); 117 mb();
155 lock->slock = 1; 118 lock->slock = 1;
156} 119}
@@ -164,59 +127,32 @@ static inline void _raw_spin_unlock(spinlock_t *lock)
164 * can "mix" irq-safe locks - any writer needs to get a 127 * can "mix" irq-safe locks - any writer needs to get a
165 * irq-safe write-lock, but readers can get non-irqsafe 128 * irq-safe write-lock, but readers can get non-irqsafe
166 * read-locks. 129 * read-locks.
130 *
131 * On x86, we implement read-write locks as a 32-bit counter
132 * with the high bit (sign) being the "contended" bit.
133 *
134 * The inline assembly is non-obvious. Think about it.
135 *
136 * Changed to use the same technique as rw semaphores. See
137 * semaphore.h for details. -ben
167 */ 138 */
168typedef struct {
169 volatile int lock;
170#ifdef CONFIG_DEBUG_SPINLOCK
171 unsigned magic;
172#endif
173#ifdef CONFIG_PREEMPT
174 unsigned int break_lock;
175#endif
176} rwlock_t;
177
178#define RWLOCK_MAGIC 0xdeaf1eed
179
180#ifdef CONFIG_DEBUG_SPINLOCK
181#define RWLOCK_MAGIC_INIT , RWLOCK_MAGIC
182#else
183#define RWLOCK_MAGIC_INIT /* */
184#endif
185
186#define RW_LOCK_UNLOCKED (rwlock_t) { RW_LOCK_BIAS RWLOCK_MAGIC_INIT }
187
188#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while(0)
189 139
190/** 140/**
191 * read_can_lock - would read_trylock() succeed? 141 * read_can_lock - would read_trylock() succeed?
192 * @lock: the rwlock in question. 142 * @lock: the rwlock in question.
193 */ 143 */
194#define read_can_lock(x) ((int)(x)->lock > 0) 144#define __raw_read_can_lock(x) ((int)(x)->lock > 0)
195 145
196/** 146/**
197 * write_can_lock - would write_trylock() succeed? 147 * write_can_lock - would write_trylock() succeed?
198 * @lock: the rwlock in question. 148 * @lock: the rwlock in question.
199 */ 149 */
200#define write_can_lock(x) ((x)->lock == RW_LOCK_BIAS) 150#define __raw_write_can_lock(x) ((x)->lock == RW_LOCK_BIAS)
201
202/*
203 * On x86, we implement read-write locks as a 32-bit counter
204 * with the high bit (sign) being the "contended" bit.
205 *
206 * The inline assembly is non-obvious. Think about it.
207 *
208 * Changed to use the same technique as rw semaphores. See
209 * semaphore.h for details. -ben
210 */
211/* the spinlock helpers are in arch/i386/kernel/semaphore.c */
212 151
213static inline void _raw_read_lock(rwlock_t *rw) 152static inline void __raw_read_lock(raw_rwlock_t *rw)
214{ 153{
215 unsigned long tmp0, tmp1; 154 unsigned long tmp0, tmp1;
216 155
217#ifdef CONFIG_DEBUG_SPINLOCK
218 BUG_ON(rw->magic != RWLOCK_MAGIC);
219#endif
220 /* 156 /*
221 * rw->lock : >0 : unlock 157 * rw->lock : >0 : unlock
222 * : <=0 : lock 158 * : <=0 : lock
@@ -264,13 +200,10 @@ static inline void _raw_read_lock(rwlock_t *rw)
264 ); 200 );
265} 201}
266 202
267static inline void _raw_write_lock(rwlock_t *rw) 203static inline void __raw_write_lock(raw_rwlock_t *rw)
268{ 204{
269 unsigned long tmp0, tmp1, tmp2; 205 unsigned long tmp0, tmp1, tmp2;
270 206
271#ifdef CONFIG_DEBUG_SPINLOCK
272 BUG_ON(rw->magic != RWLOCK_MAGIC);
273#endif
274 /* 207 /*
275 * rw->lock : =RW_LOCK_BIAS_STR : unlock 208 * rw->lock : =RW_LOCK_BIAS_STR : unlock
276 * : !=RW_LOCK_BIAS_STR : lock 209 * : !=RW_LOCK_BIAS_STR : lock
@@ -320,7 +253,7 @@ static inline void _raw_write_lock(rwlock_t *rw)
320 ); 253 );
321} 254}
322 255
323static inline void _raw_read_unlock(rwlock_t *rw) 256static inline void __raw_read_unlock(raw_rwlock_t *rw)
324{ 257{
325 unsigned long tmp0, tmp1; 258 unsigned long tmp0, tmp1;
326 259
@@ -342,7 +275,7 @@ static inline void _raw_read_unlock(rwlock_t *rw)
342 ); 275 );
343} 276}
344 277
345static inline void _raw_write_unlock(rwlock_t *rw) 278static inline void __raw_write_unlock(raw_rwlock_t *rw)
346{ 279{
347 unsigned long tmp0, tmp1, tmp2; 280 unsigned long tmp0, tmp1, tmp2;
348 281
@@ -366,9 +299,9 @@ static inline void _raw_write_unlock(rwlock_t *rw)
366 ); 299 );
367} 300}
368 301
369#define _raw_read_trylock(lock) generic_raw_read_trylock(lock) 302#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
370 303
371static inline int _raw_write_trylock(rwlock_t *lock) 304static inline int __raw_write_trylock(raw_rwlock_t *lock)
372{ 305{
373 atomic_t *count = (atomic_t *)lock; 306 atomic_t *count = (atomic_t *)lock;
374 if (atomic_sub_and_test(RW_LOCK_BIAS, count)) 307 if (atomic_sub_and_test(RW_LOCK_BIAS, count))
diff --git a/include/asm-m32r/spinlock_types.h b/include/asm-m32r/spinlock_types.h
new file mode 100644
index 000000000000..7e9941c45f40
--- /dev/null
+++ b/include/asm-m32r/spinlock_types.h
@@ -0,0 +1,23 @@
1#ifndef _ASM_M32R_SPINLOCK_TYPES_H
2#define _ASM_M32R_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 volatile int slock;
10} raw_spinlock_t;
11
12#define __RAW_SPIN_LOCK_UNLOCKED { 1 }
13
14typedef struct {
15 volatile int lock;
16} raw_rwlock_t;
17
18#define RW_LOCK_BIAS 0x01000000
19#define RW_LOCK_BIAS_STR "0x01000000"
20
21#define __RAW_RW_LOCK_UNLOCKED { RW_LOCK_BIAS }
22
23#endif
diff --git a/include/asm-mips/spinlock.h b/include/asm-mips/spinlock.h
index 114d3eb98a6a..4d0135b11156 100644
--- a/include/asm-mips/spinlock.h
+++ b/include/asm-mips/spinlock.h
@@ -16,20 +16,10 @@
16 * Your basic SMP spinlocks, allowing only a single CPU anywhere 16 * Your basic SMP spinlocks, allowing only a single CPU anywhere
17 */ 17 */
18 18
19typedef struct { 19#define __raw_spin_is_locked(x) ((x)->lock != 0)
20 volatile unsigned int lock; 20#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
21#ifdef CONFIG_PREEMPT 21#define __raw_spin_unlock_wait(x) \
22 unsigned int break_lock; 22 do { cpu_relax(); } while ((x)->lock)
23#endif
24} spinlock_t;
25
26#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 }
27
28#define spin_lock_init(x) do { (x)->lock = 0; } while(0)
29
30#define spin_is_locked(x) ((x)->lock != 0)
31#define spin_unlock_wait(x) do { barrier(); } while ((x)->lock)
32#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
33 23
34/* 24/*
35 * Simple spin lock operations. There are two variants, one clears IRQ's 25 * Simple spin lock operations. There are two variants, one clears IRQ's
@@ -38,13 +28,13 @@ typedef struct {
38 * We make no fairness assumptions. They have a cost. 28 * We make no fairness assumptions. They have a cost.
39 */ 29 */
40 30
41static inline void _raw_spin_lock(spinlock_t *lock) 31static inline void __raw_spin_lock(raw_spinlock_t *lock)
42{ 32{
43 unsigned int tmp; 33 unsigned int tmp;
44 34
45 if (R10000_LLSC_WAR) { 35 if (R10000_LLSC_WAR) {
46 __asm__ __volatile__( 36 __asm__ __volatile__(
47 " .set noreorder # _raw_spin_lock \n" 37 " .set noreorder # __raw_spin_lock \n"
48 "1: ll %1, %2 \n" 38 "1: ll %1, %2 \n"
49 " bnez %1, 1b \n" 39 " bnez %1, 1b \n"
50 " li %1, 1 \n" 40 " li %1, 1 \n"
@@ -58,7 +48,7 @@ static inline void _raw_spin_lock(spinlock_t *lock)
58 : "memory"); 48 : "memory");
59 } else { 49 } else {
60 __asm__ __volatile__( 50 __asm__ __volatile__(
61 " .set noreorder # _raw_spin_lock \n" 51 " .set noreorder # __raw_spin_lock \n"
62 "1: ll %1, %2 \n" 52 "1: ll %1, %2 \n"
63 " bnez %1, 1b \n" 53 " bnez %1, 1b \n"
64 " li %1, 1 \n" 54 " li %1, 1 \n"
@@ -72,10 +62,10 @@ static inline void _raw_spin_lock(spinlock_t *lock)
72 } 62 }
73} 63}
74 64
75static inline void _raw_spin_unlock(spinlock_t *lock) 65static inline void __raw_spin_unlock(raw_spinlock_t *lock)
76{ 66{
77 __asm__ __volatile__( 67 __asm__ __volatile__(
78 " .set noreorder # _raw_spin_unlock \n" 68 " .set noreorder # __raw_spin_unlock \n"
79 " sync \n" 69 " sync \n"
80 " sw $0, %0 \n" 70 " sw $0, %0 \n"
81 " .set\treorder \n" 71 " .set\treorder \n"
@@ -84,13 +74,13 @@ static inline void _raw_spin_unlock(spinlock_t *lock)
84 : "memory"); 74 : "memory");
85} 75}
86 76
87static inline unsigned int _raw_spin_trylock(spinlock_t *lock) 77static inline unsigned int __raw_spin_trylock(raw_spinlock_t *lock)
88{ 78{
89 unsigned int temp, res; 79 unsigned int temp, res;
90 80
91 if (R10000_LLSC_WAR) { 81 if (R10000_LLSC_WAR) {
92 __asm__ __volatile__( 82 __asm__ __volatile__(
93 " .set noreorder # _raw_spin_trylock \n" 83 " .set noreorder # __raw_spin_trylock \n"
94 "1: ll %0, %3 \n" 84 "1: ll %0, %3 \n"
95 " ori %2, %0, 1 \n" 85 " ori %2, %0, 1 \n"
96 " sc %2, %1 \n" 86 " sc %2, %1 \n"
@@ -104,7 +94,7 @@ static inline unsigned int _raw_spin_trylock(spinlock_t *lock)
104 : "memory"); 94 : "memory");
105 } else { 95 } else {
106 __asm__ __volatile__( 96 __asm__ __volatile__(
107 " .set noreorder # _raw_spin_trylock \n" 97 " .set noreorder # __raw_spin_trylock \n"
108 "1: ll %0, %3 \n" 98 "1: ll %0, %3 \n"
109 " ori %2, %0, 1 \n" 99 " ori %2, %0, 1 \n"
110 " sc %2, %1 \n" 100 " sc %2, %1 \n"
@@ -129,24 +119,13 @@ static inline unsigned int _raw_spin_trylock(spinlock_t *lock)
129 * read-locks. 119 * read-locks.
130 */ 120 */
131 121
132typedef struct { 122static inline void __raw_read_lock(raw_rwlock_t *rw)
133 volatile unsigned int lock;
134#ifdef CONFIG_PREEMPT
135 unsigned int break_lock;
136#endif
137} rwlock_t;
138
139#define RW_LOCK_UNLOCKED (rwlock_t) { 0 }
140
141#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while(0)
142
143static inline void _raw_read_lock(rwlock_t *rw)
144{ 123{
145 unsigned int tmp; 124 unsigned int tmp;
146 125
147 if (R10000_LLSC_WAR) { 126 if (R10000_LLSC_WAR) {
148 __asm__ __volatile__( 127 __asm__ __volatile__(
149 " .set noreorder # _raw_read_lock \n" 128 " .set noreorder # __raw_read_lock \n"
150 "1: ll %1, %2 \n" 129 "1: ll %1, %2 \n"
151 " bltz %1, 1b \n" 130 " bltz %1, 1b \n"
152 " addu %1, 1 \n" 131 " addu %1, 1 \n"
@@ -160,7 +139,7 @@ static inline void _raw_read_lock(rwlock_t *rw)
160 : "memory"); 139 : "memory");
161 } else { 140 } else {
162 __asm__ __volatile__( 141 __asm__ __volatile__(
163 " .set noreorder # _raw_read_lock \n" 142 " .set noreorder # __raw_read_lock \n"
164 "1: ll %1, %2 \n" 143 "1: ll %1, %2 \n"
165 " bltz %1, 1b \n" 144 " bltz %1, 1b \n"
166 " addu %1, 1 \n" 145 " addu %1, 1 \n"
@@ -177,13 +156,13 @@ static inline void _raw_read_lock(rwlock_t *rw)
177/* Note the use of sub, not subu which will make the kernel die with an 156/* Note the use of sub, not subu which will make the kernel die with an
178 overflow exception if we ever try to unlock an rwlock that is already 157 overflow exception if we ever try to unlock an rwlock that is already
179 unlocked or is being held by a writer. */ 158 unlocked or is being held by a writer. */
180static inline void _raw_read_unlock(rwlock_t *rw) 159static inline void __raw_read_unlock(raw_rwlock_t *rw)
181{ 160{
182 unsigned int tmp; 161 unsigned int tmp;
183 162
184 if (R10000_LLSC_WAR) { 163 if (R10000_LLSC_WAR) {
185 __asm__ __volatile__( 164 __asm__ __volatile__(
186 "1: ll %1, %2 # _raw_read_unlock \n" 165 "1: ll %1, %2 # __raw_read_unlock \n"
187 " sub %1, 1 \n" 166 " sub %1, 1 \n"
188 " sc %1, %0 \n" 167 " sc %1, %0 \n"
189 " beqzl %1, 1b \n" 168 " beqzl %1, 1b \n"
@@ -193,7 +172,7 @@ static inline void _raw_read_unlock(rwlock_t *rw)
193 : "memory"); 172 : "memory");
194 } else { 173 } else {
195 __asm__ __volatile__( 174 __asm__ __volatile__(
196 " .set noreorder # _raw_read_unlock \n" 175 " .set noreorder # __raw_read_unlock \n"
197 "1: ll %1, %2 \n" 176 "1: ll %1, %2 \n"
198 " sub %1, 1 \n" 177 " sub %1, 1 \n"
199 " sc %1, %0 \n" 178 " sc %1, %0 \n"
@@ -206,13 +185,13 @@ static inline void _raw_read_unlock(rwlock_t *rw)
206 } 185 }
207} 186}
208 187
209static inline void _raw_write_lock(rwlock_t *rw) 188static inline void __raw_write_lock(raw_rwlock_t *rw)
210{ 189{
211 unsigned int tmp; 190 unsigned int tmp;
212 191
213 if (R10000_LLSC_WAR) { 192 if (R10000_LLSC_WAR) {
214 __asm__ __volatile__( 193 __asm__ __volatile__(
215 " .set noreorder # _raw_write_lock \n" 194 " .set noreorder # __raw_write_lock \n"
216 "1: ll %1, %2 \n" 195 "1: ll %1, %2 \n"
217 " bnez %1, 1b \n" 196 " bnez %1, 1b \n"
218 " lui %1, 0x8000 \n" 197 " lui %1, 0x8000 \n"
@@ -226,7 +205,7 @@ static inline void _raw_write_lock(rwlock_t *rw)
226 : "memory"); 205 : "memory");
227 } else { 206 } else {
228 __asm__ __volatile__( 207 __asm__ __volatile__(
229 " .set noreorder # _raw_write_lock \n" 208 " .set noreorder # __raw_write_lock \n"
230 "1: ll %1, %2 \n" 209 "1: ll %1, %2 \n"
231 " bnez %1, 1b \n" 210 " bnez %1, 1b \n"
232 " lui %1, 0x8000 \n" 211 " lui %1, 0x8000 \n"
@@ -241,26 +220,26 @@ static inline void _raw_write_lock(rwlock_t *rw)
241 } 220 }
242} 221}
243 222
244static inline void _raw_write_unlock(rwlock_t *rw) 223static inline void __raw_write_unlock(raw_rwlock_t *rw)
245{ 224{
246 __asm__ __volatile__( 225 __asm__ __volatile__(
247 " sync # _raw_write_unlock \n" 226 " sync # __raw_write_unlock \n"
248 " sw $0, %0 \n" 227 " sw $0, %0 \n"
249 : "=m" (rw->lock) 228 : "=m" (rw->lock)
250 : "m" (rw->lock) 229 : "m" (rw->lock)
251 : "memory"); 230 : "memory");
252} 231}
253 232
254#define _raw_read_trylock(lock) generic_raw_read_trylock(lock) 233#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
255 234
256static inline int _raw_write_trylock(rwlock_t *rw) 235static inline int __raw_write_trylock(raw_rwlock_t *rw)
257{ 236{
258 unsigned int tmp; 237 unsigned int tmp;
259 int ret; 238 int ret;
260 239
261 if (R10000_LLSC_WAR) { 240 if (R10000_LLSC_WAR) {
262 __asm__ __volatile__( 241 __asm__ __volatile__(
263 " .set noreorder # _raw_write_trylock \n" 242 " .set noreorder # __raw_write_trylock \n"
264 " li %2, 0 \n" 243 " li %2, 0 \n"
265 "1: ll %1, %3 \n" 244 "1: ll %1, %3 \n"
266 " bnez %1, 2f \n" 245 " bnez %1, 2f \n"
@@ -277,7 +256,7 @@ static inline int _raw_write_trylock(rwlock_t *rw)
277 : "memory"); 256 : "memory");
278 } else { 257 } else {
279 __asm__ __volatile__( 258 __asm__ __volatile__(
280 " .set noreorder # _raw_write_trylock \n" 259 " .set noreorder # __raw_write_trylock \n"
281 " li %2, 0 \n" 260 " li %2, 0 \n"
282 "1: ll %1, %3 \n" 261 "1: ll %1, %3 \n"
283 " bnez %1, 2f \n" 262 " bnez %1, 2f \n"
diff --git a/include/asm-mips/spinlock_types.h b/include/asm-mips/spinlock_types.h
new file mode 100644
index 000000000000..ce26c5048b15
--- /dev/null
+++ b/include/asm-mips/spinlock_types.h
@@ -0,0 +1,20 @@
1#ifndef _ASM_SPINLOCK_TYPES_H
2#define _ASM_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 volatile unsigned int lock;
10} raw_spinlock_t;
11
12#define __RAW_SPIN_LOCK_UNLOCKED { 0 }
13
14typedef struct {
15 volatile unsigned int lock;
16} raw_rwlock_t;
17
18#define __RAW_RW_LOCK_UNLOCKED { 0 }
19
20#endif
diff --git a/include/asm-parisc/atomic.h b/include/asm-parisc/atomic.h
index e24f7579adb0..048a2c7fd0c0 100644
--- a/include/asm-parisc/atomic.h
+++ b/include/asm-parisc/atomic.h
@@ -24,19 +24,19 @@
24# define ATOMIC_HASH_SIZE 4 24# define ATOMIC_HASH_SIZE 4
25# define ATOMIC_HASH(a) (&(__atomic_hash[ (((unsigned long) a)/L1_CACHE_BYTES) & (ATOMIC_HASH_SIZE-1) ])) 25# define ATOMIC_HASH(a) (&(__atomic_hash[ (((unsigned long) a)/L1_CACHE_BYTES) & (ATOMIC_HASH_SIZE-1) ]))
26 26
27extern spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned; 27extern raw_spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned;
28 28
29/* Can't use _raw_spin_lock_irq because of #include problems, so 29/* Can't use raw_spin_lock_irq because of #include problems, so
30 * this is the substitute */ 30 * this is the substitute */
31#define _atomic_spin_lock_irqsave(l,f) do { \ 31#define _atomic_spin_lock_irqsave(l,f) do { \
32 spinlock_t *s = ATOMIC_HASH(l); \ 32 raw_spinlock_t *s = ATOMIC_HASH(l); \
33 local_irq_save(f); \ 33 local_irq_save(f); \
34 _raw_spin_lock(s); \ 34 __raw_spin_lock(s); \
35} while(0) 35} while(0)
36 36
37#define _atomic_spin_unlock_irqrestore(l,f) do { \ 37#define _atomic_spin_unlock_irqrestore(l,f) do { \
38 spinlock_t *s = ATOMIC_HASH(l); \ 38 raw_spinlock_t *s = ATOMIC_HASH(l); \
39 _raw_spin_unlock(s); \ 39 __raw_spin_unlock(s); \
40 local_irq_restore(f); \ 40 local_irq_restore(f); \
41} while(0) 41} while(0)
42 42
diff --git a/include/asm-parisc/bitops.h b/include/asm-parisc/bitops.h
index 928e5ef850bd..af7db694b22d 100644
--- a/include/asm-parisc/bitops.h
+++ b/include/asm-parisc/bitops.h
@@ -2,7 +2,7 @@
2#define _PARISC_BITOPS_H 2#define _PARISC_BITOPS_H
3 3
4#include <linux/compiler.h> 4#include <linux/compiler.h>
5#include <asm/system.h> 5#include <asm/spinlock.h>
6#include <asm/byteorder.h> 6#include <asm/byteorder.h>
7#include <asm/atomic.h> 7#include <asm/atomic.h>
8 8
diff --git a/include/asm-parisc/cacheflush.h b/include/asm-parisc/cacheflush.h
index 06732719d927..aa592d8c0e39 100644
--- a/include/asm-parisc/cacheflush.h
+++ b/include/asm-parisc/cacheflush.h
@@ -3,6 +3,7 @@
3 3
4#include <linux/config.h> 4#include <linux/config.h>
5#include <linux/mm.h> 5#include <linux/mm.h>
6#include <asm/cache.h> /* for flush_user_dcache_range_asm() proto */
6 7
7/* The usual comment is "Caches aren't brain-dead on the <architecture>". 8/* The usual comment is "Caches aren't brain-dead on the <architecture>".
8 * Unfortunately, that doesn't apply to PA-RISC. */ 9 * Unfortunately, that doesn't apply to PA-RISC. */
diff --git a/include/asm-parisc/processor.h b/include/asm-parisc/processor.h
index 0b61f51d8467..a9dfadd05658 100644
--- a/include/asm-parisc/processor.h
+++ b/include/asm-parisc/processor.h
@@ -11,6 +11,7 @@
11#ifndef __ASSEMBLY__ 11#ifndef __ASSEMBLY__
12#include <linux/config.h> 12#include <linux/config.h>
13#include <linux/threads.h> 13#include <linux/threads.h>
14#include <linux/spinlock_types.h>
14 15
15#include <asm/hardware.h> 16#include <asm/hardware.h>
16#include <asm/page.h> 17#include <asm/page.h>
diff --git a/include/asm-parisc/spinlock.h b/include/asm-parisc/spinlock.h
index 679ea1c651ef..43eaa6e742e0 100644
--- a/include/asm-parisc/spinlock.h
+++ b/include/asm-parisc/spinlock.h
@@ -2,30 +2,25 @@
2#define __ASM_SPINLOCK_H 2#define __ASM_SPINLOCK_H
3 3
4#include <asm/system.h> 4#include <asm/system.h>
5#include <asm/processor.h>
6#include <asm/spinlock_types.h>
5 7
6/* Note that PA-RISC has to use `1' to mean unlocked and `0' to mean locked 8/* Note that PA-RISC has to use `1' to mean unlocked and `0' to mean locked
7 * since it only has load-and-zero. Moreover, at least on some PA processors, 9 * since it only has load-and-zero. Moreover, at least on some PA processors,
8 * the semaphore address has to be 16-byte aligned. 10 * the semaphore address has to be 16-byte aligned.
9 */ 11 */
10 12
11#ifndef CONFIG_DEBUG_SPINLOCK 13static inline int __raw_spin_is_locked(raw_spinlock_t *x)
12
13#define __SPIN_LOCK_UNLOCKED { { 1, 1, 1, 1 } }
14#undef SPIN_LOCK_UNLOCKED
15#define SPIN_LOCK_UNLOCKED (spinlock_t) __SPIN_LOCK_UNLOCKED
16
17#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while(0)
18
19static inline int spin_is_locked(spinlock_t *x)
20{ 14{
21 volatile unsigned int *a = __ldcw_align(x); 15 volatile unsigned int *a = __ldcw_align(x);
22 return *a == 0; 16 return *a == 0;
23} 17}
24 18
25#define spin_unlock_wait(x) do { barrier(); } while(spin_is_locked(x)) 19#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
26#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock) 20#define __raw_spin_unlock_wait(x) \
21 do { cpu_relax(); } while (__raw_spin_is_locked(x))
27 22
28static inline void _raw_spin_lock(spinlock_t *x) 23static inline void __raw_spin_lock(raw_spinlock_t *x)
29{ 24{
30 volatile unsigned int *a; 25 volatile unsigned int *a;
31 26
@@ -36,7 +31,7 @@ static inline void _raw_spin_lock(spinlock_t *x)
36 mb(); 31 mb();
37} 32}
38 33
39static inline void _raw_spin_unlock(spinlock_t *x) 34static inline void __raw_spin_unlock(raw_spinlock_t *x)
40{ 35{
41 volatile unsigned int *a; 36 volatile unsigned int *a;
42 mb(); 37 mb();
@@ -45,7 +40,7 @@ static inline void _raw_spin_unlock(spinlock_t *x)
45 mb(); 40 mb();
46} 41}
47 42
48static inline int _raw_spin_trylock(spinlock_t *x) 43static inline int __raw_spin_trylock(raw_spinlock_t *x)
49{ 44{
50 volatile unsigned int *a; 45 volatile unsigned int *a;
51 int ret; 46 int ret;
@@ -57,131 +52,38 @@ static inline int _raw_spin_trylock(spinlock_t *x)
57 52
58 return ret; 53 return ret;
59} 54}
60
61#define spin_lock_own(LOCK, LOCATION) ((void)0)
62
63#else /* !(CONFIG_DEBUG_SPINLOCK) */
64
65#define SPINLOCK_MAGIC 0x1D244B3C
66
67#define __SPIN_LOCK_UNLOCKED { { 1, 1, 1, 1 }, SPINLOCK_MAGIC, 10, __FILE__ , NULL, 0, -1, NULL, NULL }
68#undef SPIN_LOCK_UNLOCKED
69#define SPIN_LOCK_UNLOCKED (spinlock_t) __SPIN_LOCK_UNLOCKED
70
71#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while(0)
72
73#define CHECK_LOCK(x) \
74 do { \
75 if (unlikely((x)->magic != SPINLOCK_MAGIC)) { \
76 printk(KERN_ERR "%s:%d: spin_is_locked" \
77 " on uninitialized spinlock %p.\n", \
78 __FILE__, __LINE__, (x)); \
79 } \
80 } while(0)
81
82#define spin_is_locked(x) \
83 ({ \
84 CHECK_LOCK(x); \
85 volatile unsigned int *a = __ldcw_align(x); \
86 if (unlikely((*a == 0) && (x)->babble)) { \
87 (x)->babble--; \
88 printk("KERN_WARNING \
89 %s:%d: spin_is_locked(%s/%p) already" \
90 " locked by %s:%d in %s at %p(%d)\n", \
91 __FILE__,__LINE__, (x)->module, (x), \
92 (x)->bfile, (x)->bline, (x)->task->comm,\
93 (x)->previous, (x)->oncpu); \
94 } \
95 *a == 0; \
96 })
97
98#define spin_unlock_wait(x) \
99 do { \
100 CHECK_LOCK(x); \
101 volatile unsigned int *a = __ldcw_align(x); \
102 if (unlikely((*a == 0) && (x)->babble)) { \
103 (x)->babble--; \
104 printk("KERN_WARNING \
105 %s:%d: spin_unlock_wait(%s/%p)" \
106 " owned by %s:%d in %s at %p(%d)\n", \
107 __FILE__,__LINE__, (x)->module, (x), \
108 (x)->bfile, (x)->bline, (x)->task->comm,\
109 (x)->previous, (x)->oncpu); \
110 } \
111 barrier(); \
112 } while (*((volatile unsigned char *)(__ldcw_align(x))) == 0)
113
114extern void _dbg_spin_lock(spinlock_t *lock, const char *base_file, int line_no);
115extern void _dbg_spin_unlock(spinlock_t *lock, const char *, int);
116extern int _dbg_spin_trylock(spinlock_t * lock, const char *, int);
117
118#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
119
120#define _raw_spin_unlock(lock) _dbg_spin_unlock(lock, __FILE__, __LINE__)
121#define _raw_spin_lock(lock) _dbg_spin_lock(lock, __FILE__, __LINE__)
122#define _raw_spin_trylock(lock) _dbg_spin_trylock(lock, __FILE__, __LINE__)
123
124/* just in case we need it */
125#define spin_lock_own(LOCK, LOCATION) \
126do { \
127 volatile unsigned int *a = __ldcw_align(LOCK); \
128 if (!((*a == 0) && ((LOCK)->oncpu == smp_processor_id()))) \
129 printk("KERN_WARNING \
130 %s: called on %d from %p but lock %s on %d\n", \
131 LOCATION, smp_processor_id(), \
132 __builtin_return_address(0), \
133 (*a == 0) ? "taken" : "freed", (LOCK)->on_cpu); \
134} while (0)
135
136#endif /* !(CONFIG_DEBUG_SPINLOCK) */
137 55
138/* 56/*
139 * Read-write spinlocks, allowing multiple readers 57 * Read-write spinlocks, allowing multiple readers
140 * but only one writer. 58 * but only one writer.
141 */ 59 */
142typedef struct {
143 spinlock_t lock;
144 volatile int counter;
145#ifdef CONFIG_PREEMPT
146 unsigned int break_lock;
147#endif
148} rwlock_t;
149
150#define RW_LOCK_UNLOCKED (rwlock_t) { __SPIN_LOCK_UNLOCKED, 0 }
151
152#define rwlock_init(lp) do { *(lp) = RW_LOCK_UNLOCKED; } while (0)
153 60
154#define _raw_read_trylock(lock) generic_raw_read_trylock(lock) 61#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
155 62
156/* read_lock, read_unlock are pretty straightforward. Of course it somehow 63/* read_lock, read_unlock are pretty straightforward. Of course it somehow
157 * sucks we end up saving/restoring flags twice for read_lock_irqsave aso. */ 64 * sucks we end up saving/restoring flags twice for read_lock_irqsave aso. */
158 65
159#ifdef CONFIG_DEBUG_RWLOCK 66static __inline__ void __raw_read_lock(raw_rwlock_t *rw)
160extern void _dbg_read_lock(rwlock_t * rw, const char *bfile, int bline);
161#define _raw_read_lock(rw) _dbg_read_lock(rw, __FILE__, __LINE__)
162#else
163static __inline__ void _raw_read_lock(rwlock_t *rw)
164{ 67{
165 unsigned long flags; 68 unsigned long flags;
166 local_irq_save(flags); 69 local_irq_save(flags);
167 _raw_spin_lock(&rw->lock); 70 __raw_spin_lock(&rw->lock);
168 71
169 rw->counter++; 72 rw->counter++;
170 73
171 _raw_spin_unlock(&rw->lock); 74 __raw_spin_unlock(&rw->lock);
172 local_irq_restore(flags); 75 local_irq_restore(flags);
173} 76}
174#endif /* CONFIG_DEBUG_RWLOCK */
175 77
176static __inline__ void _raw_read_unlock(rwlock_t *rw) 78static __inline__ void __raw_read_unlock(raw_rwlock_t *rw)
177{ 79{
178 unsigned long flags; 80 unsigned long flags;
179 local_irq_save(flags); 81 local_irq_save(flags);
180 _raw_spin_lock(&rw->lock); 82 __raw_spin_lock(&rw->lock);
181 83
182 rw->counter--; 84 rw->counter--;
183 85
184 _raw_spin_unlock(&rw->lock); 86 __raw_spin_unlock(&rw->lock);
185 local_irq_restore(flags); 87 local_irq_restore(flags);
186} 88}
187 89
@@ -194,20 +96,17 @@ static __inline__ void _raw_read_unlock(rwlock_t *rw)
194 * writers) in interrupt handlers someone fucked up and we'd dead-lock 96 * writers) in interrupt handlers someone fucked up and we'd dead-lock
195 * sooner or later anyway. prumpf */ 97 * sooner or later anyway. prumpf */
196 98
197#ifdef CONFIG_DEBUG_RWLOCK 99static __inline__ void __raw_write_lock(raw_rwlock_t *rw)
198extern void _dbg_write_lock(rwlock_t * rw, const char *bfile, int bline);
199#define _raw_write_lock(rw) _dbg_write_lock(rw, __FILE__, __LINE__)
200#else
201static __inline__ void _raw_write_lock(rwlock_t *rw)
202{ 100{
203retry: 101retry:
204 _raw_spin_lock(&rw->lock); 102 __raw_spin_lock(&rw->lock);
205 103
206 if(rw->counter != 0) { 104 if(rw->counter != 0) {
207 /* this basically never happens */ 105 /* this basically never happens */
208 _raw_spin_unlock(&rw->lock); 106 __raw_spin_unlock(&rw->lock);
209 107
210 while(rw->counter != 0); 108 while (rw->counter != 0)
109 cpu_relax();
211 110
212 goto retry; 111 goto retry;
213 } 112 }
@@ -215,26 +114,21 @@ retry:
215 /* got it. now leave without unlocking */ 114 /* got it. now leave without unlocking */
216 rw->counter = -1; /* remember we are locked */ 115 rw->counter = -1; /* remember we are locked */
217} 116}
218#endif /* CONFIG_DEBUG_RWLOCK */
219 117
220/* write_unlock is absolutely trivial - we don't have to wait for anything */ 118/* write_unlock is absolutely trivial - we don't have to wait for anything */
221 119
222static __inline__ void _raw_write_unlock(rwlock_t *rw) 120static __inline__ void __raw_write_unlock(raw_rwlock_t *rw)
223{ 121{
224 rw->counter = 0; 122 rw->counter = 0;
225 _raw_spin_unlock(&rw->lock); 123 __raw_spin_unlock(&rw->lock);
226} 124}
227 125
228#ifdef CONFIG_DEBUG_RWLOCK 126static __inline__ int __raw_write_trylock(raw_rwlock_t *rw)
229extern int _dbg_write_trylock(rwlock_t * rw, const char *bfile, int bline);
230#define _raw_write_trylock(rw) _dbg_write_trylock(rw, __FILE__, __LINE__)
231#else
232static __inline__ int _raw_write_trylock(rwlock_t *rw)
233{ 127{
234 _raw_spin_lock(&rw->lock); 128 __raw_spin_lock(&rw->lock);
235 if (rw->counter != 0) { 129 if (rw->counter != 0) {
236 /* this basically never happens */ 130 /* this basically never happens */
237 _raw_spin_unlock(&rw->lock); 131 __raw_spin_unlock(&rw->lock);
238 132
239 return 0; 133 return 0;
240 } 134 }
@@ -243,14 +137,13 @@ static __inline__ int _raw_write_trylock(rwlock_t *rw)
243 rw->counter = -1; /* remember we are locked */ 137 rw->counter = -1; /* remember we are locked */
244 return 1; 138 return 1;
245} 139}
246#endif /* CONFIG_DEBUG_RWLOCK */
247 140
248static __inline__ int is_read_locked(rwlock_t *rw) 141static __inline__ int __raw_is_read_locked(raw_rwlock_t *rw)
249{ 142{
250 return rw->counter > 0; 143 return rw->counter > 0;
251} 144}
252 145
253static __inline__ int is_write_locked(rwlock_t *rw) 146static __inline__ int __raw_is_write_locked(raw_rwlock_t *rw)
254{ 147{
255 return rw->counter < 0; 148 return rw->counter < 0;
256} 149}
diff --git a/include/asm-parisc/spinlock_types.h b/include/asm-parisc/spinlock_types.h
new file mode 100644
index 000000000000..785bba822fbf
--- /dev/null
+++ b/include/asm-parisc/spinlock_types.h
@@ -0,0 +1,21 @@
1#ifndef __ASM_SPINLOCK_TYPES_H
2#define __ASM_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 volatile unsigned int lock[4];
10} raw_spinlock_t;
11
12#define __RAW_SPIN_LOCK_UNLOCKED { { 1, 1, 1, 1 } }
13
14typedef struct {
15 raw_spinlock_t lock;
16 volatile int counter;
17} raw_rwlock_t;
18
19#define __RAW_RW_LOCK_UNLOCKED { __RAW_SPIN_LOCK_UNLOCKED, 0 }
20
21#endif
diff --git a/include/asm-parisc/system.h b/include/asm-parisc/system.h
index 81c543339036..26ff844a21c1 100644
--- a/include/asm-parisc/system.h
+++ b/include/asm-parisc/system.h
@@ -160,29 +160,7 @@ static inline void set_eiem(unsigned long val)
160}) 160})
161 161
162#ifdef CONFIG_SMP 162#ifdef CONFIG_SMP
163/* 163# define __lock_aligned __attribute__((__section__(".data.lock_aligned")))
164 * Your basic SMP spinlocks, allowing only a single CPU anywhere
165 */
166
167typedef struct {
168 volatile unsigned int lock[4];
169#ifdef CONFIG_DEBUG_SPINLOCK
170 unsigned long magic;
171 volatile unsigned int babble;
172 const char *module;
173 char *bfile;
174 int bline;
175 int oncpu;
176 void *previous;
177 struct task_struct * task;
178#endif
179#ifdef CONFIG_PREEMPT
180 unsigned int break_lock;
181#endif
182} spinlock_t;
183
184#define __lock_aligned __attribute__((__section__(".data.lock_aligned")))
185
186#endif 164#endif
187 165
188#define KERNEL_START (0x10100000 - 0x1000) 166#define KERNEL_START (0x10100000 - 0x1000)
diff --git a/include/asm-ppc/spinlock.h b/include/asm-ppc/spinlock.h
index 909199aae104..20edcf2a6e0c 100644
--- a/include/asm-ppc/spinlock.h
+++ b/include/asm-ppc/spinlock.h
@@ -5,41 +5,21 @@
5 5
6/* 6/*
7 * Simple spin lock operations. 7 * Simple spin lock operations.
8 *
9 * (the type definitions are in asm/raw_spinlock_types.h)
8 */ 10 */
9 11
10typedef struct { 12#define __raw_spin_is_locked(x) ((x)->lock != 0)
11 volatile unsigned long lock; 13#define __raw_spin_unlock_wait(lock) \
12#ifdef CONFIG_DEBUG_SPINLOCK 14 do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
13 volatile unsigned long owner_pc; 15#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
14 volatile unsigned long owner_cpu; 16
15#endif 17static inline void __raw_spin_lock(raw_spinlock_t *lock)
16#ifdef CONFIG_PREEMPT
17 unsigned int break_lock;
18#endif
19} spinlock_t;
20
21#ifdef __KERNEL__
22#ifdef CONFIG_DEBUG_SPINLOCK
23#define SPINLOCK_DEBUG_INIT , 0, 0
24#else
25#define SPINLOCK_DEBUG_INIT /* */
26#endif
27
28#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 SPINLOCK_DEBUG_INIT }
29
30#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while(0)
31#define spin_is_locked(x) ((x)->lock != 0)
32#define spin_unlock_wait(x) do { barrier(); } while(spin_is_locked(x))
33#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
34
35#ifndef CONFIG_DEBUG_SPINLOCK
36
37static inline void _raw_spin_lock(spinlock_t *lock)
38{ 18{
39 unsigned long tmp; 19 unsigned long tmp;
40 20
41 __asm__ __volatile__( 21 __asm__ __volatile__(
42 "b 1f # spin_lock\n\ 22 "b 1f # __raw_spin_lock\n\
432: lwzx %0,0,%1\n\ 232: lwzx %0,0,%1\n\
44 cmpwi 0,%0,0\n\ 24 cmpwi 0,%0,0\n\
45 bne+ 2b\n\ 25 bne+ 2b\n\
@@ -55,21 +35,13 @@ static inline void _raw_spin_lock(spinlock_t *lock)
55 : "cr0", "memory"); 35 : "cr0", "memory");
56} 36}
57 37
58static inline void _raw_spin_unlock(spinlock_t *lock) 38static inline void __raw_spin_unlock(raw_spinlock_t *lock)
59{ 39{
60 __asm__ __volatile__("eieio # spin_unlock": : :"memory"); 40 __asm__ __volatile__("eieio # __raw_spin_unlock": : :"memory");
61 lock->lock = 0; 41 lock->lock = 0;
62} 42}
63 43
64#define _raw_spin_trylock(l) (!test_and_set_bit(0,&(l)->lock)) 44#define __raw_spin_trylock(l) (!test_and_set_bit(0,&(l)->lock))
65
66#else
67
68extern void _raw_spin_lock(spinlock_t *lock);
69extern void _raw_spin_unlock(spinlock_t *lock);
70extern int _raw_spin_trylock(spinlock_t *lock);
71
72#endif
73 45
74/* 46/*
75 * Read-write spinlocks, allowing multiple readers 47 * Read-write spinlocks, allowing multiple readers
@@ -81,22 +53,11 @@ extern int _raw_spin_trylock(spinlock_t *lock);
81 * irq-safe write-lock, but readers can get non-irqsafe 53 * irq-safe write-lock, but readers can get non-irqsafe
82 * read-locks. 54 * read-locks.
83 */ 55 */
84typedef struct {
85 volatile signed int lock;
86#ifdef CONFIG_PREEMPT
87 unsigned int break_lock;
88#endif
89} rwlock_t;
90 56
91#define RW_LOCK_UNLOCKED (rwlock_t) { 0 } 57#define __raw_read_can_lock(rw) ((rw)->lock >= 0)
92#define rwlock_init(lp) do { *(lp) = RW_LOCK_UNLOCKED; } while(0) 58#define __raw_write_can_lock(rw) (!(rw)->lock)
93 59
94#define read_can_lock(rw) ((rw)->lock >= 0) 60static __inline__ int __raw_read_trylock(raw_rwlock_t *rw)
95#define write_can_lock(rw) (!(rw)->lock)
96
97#ifndef CONFIG_DEBUG_SPINLOCK
98
99static __inline__ int _raw_read_trylock(rwlock_t *rw)
100{ 61{
101 signed int tmp; 62 signed int tmp;
102 63
@@ -116,7 +77,7 @@ static __inline__ int _raw_read_trylock(rwlock_t *rw)
116 return tmp > 0; 77 return tmp > 0;
117} 78}
118 79
119static __inline__ void _raw_read_lock(rwlock_t *rw) 80static __inline__ void __raw_read_lock(raw_rwlock_t *rw)
120{ 81{
121 signed int tmp; 82 signed int tmp;
122 83
@@ -137,7 +98,7 @@ static __inline__ void _raw_read_lock(rwlock_t *rw)
137 : "cr0", "memory"); 98 : "cr0", "memory");
138} 99}
139 100
140static __inline__ void _raw_read_unlock(rwlock_t *rw) 101static __inline__ void __raw_read_unlock(raw_rwlock_t *rw)
141{ 102{
142 signed int tmp; 103 signed int tmp;
143 104
@@ -153,7 +114,7 @@ static __inline__ void _raw_read_unlock(rwlock_t *rw)
153 : "cr0", "memory"); 114 : "cr0", "memory");
154} 115}
155 116
156static __inline__ int _raw_write_trylock(rwlock_t *rw) 117static __inline__ int __raw_write_trylock(raw_rwlock_t *rw)
157{ 118{
158 signed int tmp; 119 signed int tmp;
159 120
@@ -173,7 +134,7 @@ static __inline__ int _raw_write_trylock(rwlock_t *rw)
173 return tmp == 0; 134 return tmp == 0;
174} 135}
175 136
176static __inline__ void _raw_write_lock(rwlock_t *rw) 137static __inline__ void __raw_write_lock(raw_rwlock_t *rw)
177{ 138{
178 signed int tmp; 139 signed int tmp;
179 140
@@ -194,22 +155,10 @@ static __inline__ void _raw_write_lock(rwlock_t *rw)
194 : "cr0", "memory"); 155 : "cr0", "memory");
195} 156}
196 157
197static __inline__ void _raw_write_unlock(rwlock_t *rw) 158static __inline__ void __raw_write_unlock(raw_rwlock_t *rw)
198{ 159{
199 __asm__ __volatile__("eieio # write_unlock": : :"memory"); 160 __asm__ __volatile__("eieio # write_unlock": : :"memory");
200 rw->lock = 0; 161 rw->lock = 0;
201} 162}
202 163
203#else
204
205extern void _raw_read_lock(rwlock_t *rw);
206extern void _raw_read_unlock(rwlock_t *rw);
207extern void _raw_write_lock(rwlock_t *rw);
208extern void _raw_write_unlock(rwlock_t *rw);
209extern int _raw_read_trylock(rwlock_t *rw);
210extern int _raw_write_trylock(rwlock_t *rw);
211
212#endif
213
214#endif /* __ASM_SPINLOCK_H */ 164#endif /* __ASM_SPINLOCK_H */
215#endif /* __KERNEL__ */
diff --git a/include/asm-ppc/spinlock_types.h b/include/asm-ppc/spinlock_types.h
new file mode 100644
index 000000000000..7919ccc75b8a
--- /dev/null
+++ b/include/asm-ppc/spinlock_types.h
@@ -0,0 +1,20 @@
1#ifndef __ASM_SPINLOCK_TYPES_H
2#define __ASM_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 volatile unsigned long lock;
10} raw_spinlock_t;
11
12#define __RAW_SPIN_LOCK_UNLOCKED { 0 }
13
14typedef struct {
15 volatile signed int lock;
16} raw_rwlock_t;
17
18#define __RAW_RW_LOCK_UNLOCKED { 0 }
19
20#endif
diff --git a/include/asm-ppc64/spinlock.h b/include/asm-ppc64/spinlock.h
index acd11564dd75..14cb895bb607 100644
--- a/include/asm-ppc64/spinlock.h
+++ b/include/asm-ppc64/spinlock.h
@@ -15,36 +15,42 @@
15 * modify it under the terms of the GNU General Public License 15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version 16 * as published by the Free Software Foundation; either version
17 * 2 of the License, or (at your option) any later version. 17 * 2 of the License, or (at your option) any later version.
18 *
19 * (the type definitions are in asm/spinlock_types.h)
18 */ 20 */
19#include <linux/config.h> 21#include <linux/config.h>
20#include <asm/paca.h> 22#include <asm/paca.h>
21#include <asm/hvcall.h> 23#include <asm/hvcall.h>
22#include <asm/iSeries/HvCall.h> 24#include <asm/iSeries/HvCall.h>
23 25
24typedef struct { 26#define __raw_spin_is_locked(x) ((x)->slock != 0)
25 volatile unsigned int lock;
26#ifdef CONFIG_PREEMPT
27 unsigned int break_lock;
28#endif
29} spinlock_t;
30 27
31typedef struct { 28/*
32 volatile signed int lock; 29 * This returns the old value in the lock, so we succeeded
33#ifdef CONFIG_PREEMPT 30 * in getting the lock if the return value is 0.
34 unsigned int break_lock; 31 */
35#endif 32static __inline__ unsigned long __spin_trylock(raw_spinlock_t *lock)
36} rwlock_t; 33{
34 unsigned long tmp, tmp2;
37 35
38#ifdef __KERNEL__ 36 __asm__ __volatile__(
39#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 } 37" lwz %1,%3(13) # __spin_trylock\n\
381: lwarx %0,0,%2\n\
39 cmpwi 0,%0,0\n\
40 bne- 2f\n\
41 stwcx. %1,0,%2\n\
42 bne- 1b\n\
43 isync\n\
442:" : "=&r" (tmp), "=&r" (tmp2)
45 : "r" (&lock->slock), "i" (offsetof(struct paca_struct, lock_token))
46 : "cr0", "memory");
40 47
41#define spin_is_locked(x) ((x)->lock != 0) 48 return tmp;
42#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while(0) 49}
43 50
44static __inline__ void _raw_spin_unlock(spinlock_t *lock) 51static int __inline__ __raw_spin_trylock(raw_spinlock_t *lock)
45{ 52{
46 __asm__ __volatile__("lwsync # spin_unlock": : :"memory"); 53 return __spin_trylock(lock) == 0;
47 lock->lock = 0;
48} 54}
49 55
50/* 56/*
@@ -64,44 +70,15 @@ static __inline__ void _raw_spin_unlock(spinlock_t *lock)
64#if defined(CONFIG_PPC_SPLPAR) || defined(CONFIG_PPC_ISERIES) 70#if defined(CONFIG_PPC_SPLPAR) || defined(CONFIG_PPC_ISERIES)
65/* We only yield to the hypervisor if we are in shared processor mode */ 71/* We only yield to the hypervisor if we are in shared processor mode */
66#define SHARED_PROCESSOR (get_paca()->lppaca.shared_proc) 72#define SHARED_PROCESSOR (get_paca()->lppaca.shared_proc)
67extern void __spin_yield(spinlock_t *lock); 73extern void __spin_yield(raw_spinlock_t *lock);
68extern void __rw_yield(rwlock_t *lock); 74extern void __rw_yield(raw_rwlock_t *lock);
69#else /* SPLPAR || ISERIES */ 75#else /* SPLPAR || ISERIES */
70#define __spin_yield(x) barrier() 76#define __spin_yield(x) barrier()
71#define __rw_yield(x) barrier() 77#define __rw_yield(x) barrier()
72#define SHARED_PROCESSOR 0 78#define SHARED_PROCESSOR 0
73#endif 79#endif
74extern void spin_unlock_wait(spinlock_t *lock);
75
76/*
77 * This returns the old value in the lock, so we succeeded
78 * in getting the lock if the return value is 0.
79 */
80static __inline__ unsigned long __spin_trylock(spinlock_t *lock)
81{
82 unsigned long tmp, tmp2;
83
84 __asm__ __volatile__(
85" lwz %1,%3(13) # __spin_trylock\n\
861: lwarx %0,0,%2\n\
87 cmpwi 0,%0,0\n\
88 bne- 2f\n\
89 stwcx. %1,0,%2\n\
90 bne- 1b\n\
91 isync\n\
922:" : "=&r" (tmp), "=&r" (tmp2)
93 : "r" (&lock->lock), "i" (offsetof(struct paca_struct, lock_token))
94 : "cr0", "memory");
95
96 return tmp;
97}
98
99static int __inline__ _raw_spin_trylock(spinlock_t *lock)
100{
101 return __spin_trylock(lock) == 0;
102}
103 80
104static void __inline__ _raw_spin_lock(spinlock_t *lock) 81static void __inline__ __raw_spin_lock(raw_spinlock_t *lock)
105{ 82{
106 while (1) { 83 while (1) {
107 if (likely(__spin_trylock(lock) == 0)) 84 if (likely(__spin_trylock(lock) == 0))
@@ -110,12 +87,12 @@ static void __inline__ _raw_spin_lock(spinlock_t *lock)
110 HMT_low(); 87 HMT_low();
111 if (SHARED_PROCESSOR) 88 if (SHARED_PROCESSOR)
112 __spin_yield(lock); 89 __spin_yield(lock);
113 } while (unlikely(lock->lock != 0)); 90 } while (unlikely(lock->slock != 0));
114 HMT_medium(); 91 HMT_medium();
115 } 92 }
116} 93}
117 94
118static void __inline__ _raw_spin_lock_flags(spinlock_t *lock, unsigned long flags) 95static void __inline__ __raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long flags)
119{ 96{
120 unsigned long flags_dis; 97 unsigned long flags_dis;
121 98
@@ -128,12 +105,20 @@ static void __inline__ _raw_spin_lock_flags(spinlock_t *lock, unsigned long flag
128 HMT_low(); 105 HMT_low();
129 if (SHARED_PROCESSOR) 106 if (SHARED_PROCESSOR)
130 __spin_yield(lock); 107 __spin_yield(lock);
131 } while (unlikely(lock->lock != 0)); 108 } while (unlikely(lock->slock != 0));
132 HMT_medium(); 109 HMT_medium();
133 local_irq_restore(flags_dis); 110 local_irq_restore(flags_dis);
134 } 111 }
135} 112}
136 113
114static __inline__ void __raw_spin_unlock(raw_spinlock_t *lock)
115{
116 __asm__ __volatile__("lwsync # __raw_spin_unlock": : :"memory");
117 lock->slock = 0;
118}
119
120extern void __raw_spin_unlock_wait(raw_spinlock_t *lock);
121
137/* 122/*
138 * Read-write spinlocks, allowing multiple readers 123 * Read-write spinlocks, allowing multiple readers
139 * but only one writer. 124 * but only one writer.
@@ -144,24 +129,15 @@ static void __inline__ _raw_spin_lock_flags(spinlock_t *lock, unsigned long flag
144 * irq-safe write-lock, but readers can get non-irqsafe 129 * irq-safe write-lock, but readers can get non-irqsafe
145 * read-locks. 130 * read-locks.
146 */ 131 */
147#define RW_LOCK_UNLOCKED (rwlock_t) { 0 }
148 132
149#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while(0) 133#define __raw_read_can_lock(rw) ((rw)->lock >= 0)
150 134#define __raw_write_can_lock(rw) (!(rw)->lock)
151#define read_can_lock(rw) ((rw)->lock >= 0)
152#define write_can_lock(rw) (!(rw)->lock)
153
154static __inline__ void _raw_write_unlock(rwlock_t *rw)
155{
156 __asm__ __volatile__("lwsync # write_unlock": : :"memory");
157 rw->lock = 0;
158}
159 135
160/* 136/*
161 * This returns the old value in the lock + 1, 137 * This returns the old value in the lock + 1,
162 * so we got a read lock if the return value is > 0. 138 * so we got a read lock if the return value is > 0.
163 */ 139 */
164static long __inline__ __read_trylock(rwlock_t *rw) 140static long __inline__ __read_trylock(raw_rwlock_t *rw)
165{ 141{
166 long tmp; 142 long tmp;
167 143
@@ -180,45 +156,11 @@ static long __inline__ __read_trylock(rwlock_t *rw)
180 return tmp; 156 return tmp;
181} 157}
182 158
183static int __inline__ _raw_read_trylock(rwlock_t *rw)
184{
185 return __read_trylock(rw) > 0;
186}
187
188static void __inline__ _raw_read_lock(rwlock_t *rw)
189{
190 while (1) {
191 if (likely(__read_trylock(rw) > 0))
192 break;
193 do {
194 HMT_low();
195 if (SHARED_PROCESSOR)
196 __rw_yield(rw);
197 } while (unlikely(rw->lock < 0));
198 HMT_medium();
199 }
200}
201
202static void __inline__ _raw_read_unlock(rwlock_t *rw)
203{
204 long tmp;
205
206 __asm__ __volatile__(
207 "eieio # read_unlock\n\
2081: lwarx %0,0,%1\n\
209 addic %0,%0,-1\n\
210 stwcx. %0,0,%1\n\
211 bne- 1b"
212 : "=&r"(tmp)
213 : "r"(&rw->lock)
214 : "cr0", "memory");
215}
216
217/* 159/*
218 * This returns the old value in the lock, 160 * This returns the old value in the lock,
219 * so we got the write lock if the return value is 0. 161 * so we got the write lock if the return value is 0.
220 */ 162 */
221static __inline__ long __write_trylock(rwlock_t *rw) 163static __inline__ long __write_trylock(raw_rwlock_t *rw)
222{ 164{
223 long tmp, tmp2; 165 long tmp, tmp2;
224 166
@@ -237,12 +179,21 @@ static __inline__ long __write_trylock(rwlock_t *rw)
237 return tmp; 179 return tmp;
238} 180}
239 181
240static int __inline__ _raw_write_trylock(rwlock_t *rw) 182static void __inline__ __raw_read_lock(raw_rwlock_t *rw)
241{ 183{
242 return __write_trylock(rw) == 0; 184 while (1) {
185 if (likely(__read_trylock(rw) > 0))
186 break;
187 do {
188 HMT_low();
189 if (SHARED_PROCESSOR)
190 __rw_yield(rw);
191 } while (unlikely(rw->lock < 0));
192 HMT_medium();
193 }
243} 194}
244 195
245static void __inline__ _raw_write_lock(rwlock_t *rw) 196static void __inline__ __raw_write_lock(raw_rwlock_t *rw)
246{ 197{
247 while (1) { 198 while (1) {
248 if (likely(__write_trylock(rw) == 0)) 199 if (likely(__write_trylock(rw) == 0))
@@ -256,5 +207,35 @@ static void __inline__ _raw_write_lock(rwlock_t *rw)
256 } 207 }
257} 208}
258 209
259#endif /* __KERNEL__ */ 210static int __inline__ __raw_read_trylock(raw_rwlock_t *rw)
211{
212 return __read_trylock(rw) > 0;
213}
214
215static int __inline__ __raw_write_trylock(raw_rwlock_t *rw)
216{
217 return __write_trylock(rw) == 0;
218}
219
220static void __inline__ __raw_read_unlock(raw_rwlock_t *rw)
221{
222 long tmp;
223
224 __asm__ __volatile__(
225 "eieio # read_unlock\n\
2261: lwarx %0,0,%1\n\
227 addic %0,%0,-1\n\
228 stwcx. %0,0,%1\n\
229 bne- 1b"
230 : "=&r"(tmp)
231 : "r"(&rw->lock)
232 : "cr0", "memory");
233}
234
235static __inline__ void __raw_write_unlock(raw_rwlock_t *rw)
236{
237 __asm__ __volatile__("lwsync # write_unlock": : :"memory");
238 rw->lock = 0;
239}
240
260#endif /* __ASM_SPINLOCK_H */ 241#endif /* __ASM_SPINLOCK_H */
diff --git a/include/asm-ppc64/spinlock_types.h b/include/asm-ppc64/spinlock_types.h
new file mode 100644
index 000000000000..a37c8eabb9f2
--- /dev/null
+++ b/include/asm-ppc64/spinlock_types.h
@@ -0,0 +1,20 @@
1#ifndef __ASM_SPINLOCK_TYPES_H
2#define __ASM_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 volatile unsigned int slock;
10} raw_spinlock_t;
11
12#define __RAW_SPIN_LOCK_UNLOCKED { 0 }
13
14typedef struct {
15 volatile signed int lock;
16} raw_rwlock_t;
17
18#define __RAW_RW_LOCK_UNLOCKED { 0 }
19
20#endif
diff --git a/include/asm-s390/spinlock.h b/include/asm-s390/spinlock.h
index 321b23bba1ec..273dbecf8ace 100644
--- a/include/asm-s390/spinlock.h
+++ b/include/asm-s390/spinlock.h
@@ -27,25 +27,19 @@ _raw_compare_and_swap(volatile unsigned int *lock,
27 * on the local processor, one does not. 27 * on the local processor, one does not.
28 * 28 *
29 * We make no fairness assumptions. They have a cost. 29 * We make no fairness assumptions. They have a cost.
30 *
31 * (the type definitions are in asm/spinlock_types.h)
30 */ 32 */
31 33
32typedef struct { 34#define __raw_spin_is_locked(x) ((x)->lock != 0)
33 volatile unsigned int lock; 35#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
34#ifdef CONFIG_PREEMPT 36#define __raw_spin_unlock_wait(lock) \
35 unsigned int break_lock; 37 do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
36#endif
37} __attribute__ ((aligned (4))) spinlock_t;
38
39#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 }
40#define spin_lock_init(lp) do { (lp)->lock = 0; } while(0)
41#define spin_unlock_wait(lp) do { barrier(); } while(((volatile spinlock_t *)(lp))->lock)
42#define spin_is_locked(x) ((x)->lock != 0)
43#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
44 38
45extern void _raw_spin_lock_wait(spinlock_t *lp, unsigned int pc); 39extern void _raw_spin_lock_wait(raw_spinlock_t *lp, unsigned int pc);
46extern int _raw_spin_trylock_retry(spinlock_t *lp, unsigned int pc); 40extern int _raw_spin_trylock_retry(raw_spinlock_t *lp, unsigned int pc);
47 41
48static inline void _raw_spin_lock(spinlock_t *lp) 42static inline void __raw_spin_lock(raw_spinlock_t *lp)
49{ 43{
50 unsigned long pc = 1 | (unsigned long) __builtin_return_address(0); 44 unsigned long pc = 1 | (unsigned long) __builtin_return_address(0);
51 45
@@ -53,7 +47,7 @@ static inline void _raw_spin_lock(spinlock_t *lp)
53 _raw_spin_lock_wait(lp, pc); 47 _raw_spin_lock_wait(lp, pc);
54} 48}
55 49
56static inline int _raw_spin_trylock(spinlock_t *lp) 50static inline int __raw_spin_trylock(raw_spinlock_t *lp)
57{ 51{
58 unsigned long pc = 1 | (unsigned long) __builtin_return_address(0); 52 unsigned long pc = 1 | (unsigned long) __builtin_return_address(0);
59 53
@@ -62,7 +56,7 @@ static inline int _raw_spin_trylock(spinlock_t *lp)
62 return _raw_spin_trylock_retry(lp, pc); 56 return _raw_spin_trylock_retry(lp, pc);
63} 57}
64 58
65static inline void _raw_spin_unlock(spinlock_t *lp) 59static inline void __raw_spin_unlock(raw_spinlock_t *lp)
66{ 60{
67 _raw_compare_and_swap(&lp->lock, lp->lock, 0); 61 _raw_compare_and_swap(&lp->lock, lp->lock, 0);
68} 62}
@@ -77,36 +71,25 @@ static inline void _raw_spin_unlock(spinlock_t *lp)
77 * irq-safe write-lock, but readers can get non-irqsafe 71 * irq-safe write-lock, but readers can get non-irqsafe
78 * read-locks. 72 * read-locks.
79 */ 73 */
80typedef struct {
81 volatile unsigned int lock;
82 volatile unsigned long owner_pc;
83#ifdef CONFIG_PREEMPT
84 unsigned int break_lock;
85#endif
86} rwlock_t;
87
88#define RW_LOCK_UNLOCKED (rwlock_t) { 0, 0 }
89
90#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while(0)
91 74
92/** 75/**
93 * read_can_lock - would read_trylock() succeed? 76 * read_can_lock - would read_trylock() succeed?
94 * @lock: the rwlock in question. 77 * @lock: the rwlock in question.
95 */ 78 */
96#define read_can_lock(x) ((int)(x)->lock >= 0) 79#define __raw_read_can_lock(x) ((int)(x)->lock >= 0)
97 80
98/** 81/**
99 * write_can_lock - would write_trylock() succeed? 82 * write_can_lock - would write_trylock() succeed?
100 * @lock: the rwlock in question. 83 * @lock: the rwlock in question.
101 */ 84 */
102#define write_can_lock(x) ((x)->lock == 0) 85#define __raw_write_can_lock(x) ((x)->lock == 0)
103 86
104extern void _raw_read_lock_wait(rwlock_t *lp); 87extern void _raw_read_lock_wait(raw_rwlock_t *lp);
105extern int _raw_read_trylock_retry(rwlock_t *lp); 88extern int _raw_read_trylock_retry(raw_rwlock_t *lp);
106extern void _raw_write_lock_wait(rwlock_t *lp); 89extern void _raw_write_lock_wait(raw_rwlock_t *lp);
107extern int _raw_write_trylock_retry(rwlock_t *lp); 90extern int _raw_write_trylock_retry(raw_rwlock_t *lp);
108 91
109static inline void _raw_read_lock(rwlock_t *rw) 92static inline void __raw_read_lock(raw_rwlock_t *rw)
110{ 93{
111 unsigned int old; 94 unsigned int old;
112 old = rw->lock & 0x7fffffffU; 95 old = rw->lock & 0x7fffffffU;
@@ -114,7 +97,7 @@ static inline void _raw_read_lock(rwlock_t *rw)
114 _raw_read_lock_wait(rw); 97 _raw_read_lock_wait(rw);
115} 98}
116 99
117static inline void _raw_read_unlock(rwlock_t *rw) 100static inline void __raw_read_unlock(raw_rwlock_t *rw)
118{ 101{
119 unsigned int old, cmp; 102 unsigned int old, cmp;
120 103
@@ -125,18 +108,18 @@ static inline void _raw_read_unlock(rwlock_t *rw)
125 } while (cmp != old); 108 } while (cmp != old);
126} 109}
127 110
128static inline void _raw_write_lock(rwlock_t *rw) 111static inline void __raw_write_lock(raw_rwlock_t *rw)
129{ 112{
130 if (unlikely(_raw_compare_and_swap(&rw->lock, 0, 0x80000000) != 0)) 113 if (unlikely(_raw_compare_and_swap(&rw->lock, 0, 0x80000000) != 0))
131 _raw_write_lock_wait(rw); 114 _raw_write_lock_wait(rw);
132} 115}
133 116
134static inline void _raw_write_unlock(rwlock_t *rw) 117static inline void __raw_write_unlock(raw_rwlock_t *rw)
135{ 118{
136 _raw_compare_and_swap(&rw->lock, 0x80000000, 0); 119 _raw_compare_and_swap(&rw->lock, 0x80000000, 0);
137} 120}
138 121
139static inline int _raw_read_trylock(rwlock_t *rw) 122static inline int __raw_read_trylock(raw_rwlock_t *rw)
140{ 123{
141 unsigned int old; 124 unsigned int old;
142 old = rw->lock & 0x7fffffffU; 125 old = rw->lock & 0x7fffffffU;
@@ -145,7 +128,7 @@ static inline int _raw_read_trylock(rwlock_t *rw)
145 return _raw_read_trylock_retry(rw); 128 return _raw_read_trylock_retry(rw);
146} 129}
147 130
148static inline int _raw_write_trylock(rwlock_t *rw) 131static inline int __raw_write_trylock(raw_rwlock_t *rw)
149{ 132{
150 if (likely(_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0)) 133 if (likely(_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0))
151 return 1; 134 return 1;
diff --git a/include/asm-s390/spinlock_types.h b/include/asm-s390/spinlock_types.h
new file mode 100644
index 000000000000..f79a2216204f
--- /dev/null
+++ b/include/asm-s390/spinlock_types.h
@@ -0,0 +1,21 @@
1#ifndef __ASM_SPINLOCK_TYPES_H
2#define __ASM_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 volatile unsigned int lock;
10} __attribute__ ((aligned (4))) raw_spinlock_t;
11
12#define __RAW_SPIN_LOCK_UNLOCKED { 0 }
13
14typedef struct {
15 volatile unsigned int lock;
16 volatile unsigned int owner_pc;
17} raw_rwlock_t;
18
19#define __RAW_RW_LOCK_UNLOCKED { 0, 0 }
20
21#endif
diff --git a/include/asm-sh/spinlock.h b/include/asm-sh/spinlock.h
index e770b55649eb..846322d4c35d 100644
--- a/include/asm-sh/spinlock.h
+++ b/include/asm-sh/spinlock.h
@@ -15,20 +15,11 @@
15/* 15/*
16 * Your basic SMP spinlocks, allowing only a single CPU anywhere 16 * Your basic SMP spinlocks, allowing only a single CPU anywhere
17 */ 17 */
18typedef struct {
19 volatile unsigned long lock;
20#ifdef CONFIG_PREEMPT
21 unsigned int break_lock;
22#endif
23} spinlock_t;
24 18
25#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 } 19#define __raw_spin_is_locked(x) ((x)->lock != 0)
26 20#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
27#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while(0) 21#define __raw_spin_unlock_wait(x) \
28 22 do { cpu_relax(); } while (__raw_spin_is_locked(x))
29#define spin_is_locked(x) ((x)->lock != 0)
30#define spin_unlock_wait(x) do { barrier(); } while (spin_is_locked(x))
31#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
32 23
33/* 24/*
34 * Simple spin lock operations. There are two variants, one clears IRQ's 25 * Simple spin lock operations. There are two variants, one clears IRQ's
@@ -36,7 +27,7 @@ typedef struct {
36 * 27 *
37 * We make no fairness assumptions. They have a cost. 28 * We make no fairness assumptions. They have a cost.
38 */ 29 */
39static inline void _raw_spin_lock(spinlock_t *lock) 30static inline void __raw_spin_lock(raw_spinlock_t *lock)
40{ 31{
41 __asm__ __volatile__ ( 32 __asm__ __volatile__ (
42 "1:\n\t" 33 "1:\n\t"
@@ -49,14 +40,14 @@ static inline void _raw_spin_lock(spinlock_t *lock)
49 ); 40 );
50} 41}
51 42
52static inline void _raw_spin_unlock(spinlock_t *lock) 43static inline void __raw_spin_unlock(raw_spinlock_t *lock)
53{ 44{
54 assert_spin_locked(lock); 45 assert_spin_locked(lock);
55 46
56 lock->lock = 0; 47 lock->lock = 0;
57} 48}
58 49
59#define _raw_spin_trylock(x) (!test_and_set_bit(0, &(x)->lock)) 50#define __raw_spin_trylock(x) (!test_and_set_bit(0, &(x)->lock))
60 51
61/* 52/*
62 * Read-write spinlocks, allowing multiple readers but only one writer. 53 * Read-write spinlocks, allowing multiple readers but only one writer.
@@ -66,51 +57,40 @@ static inline void _raw_spin_unlock(spinlock_t *lock)
66 * needs to get a irq-safe write-lock, but readers can get non-irqsafe 57 * needs to get a irq-safe write-lock, but readers can get non-irqsafe
67 * read-locks. 58 * read-locks.
68 */ 59 */
69typedef struct { 60
70 spinlock_t lock; 61static inline void __raw_read_lock(raw_rwlock_t *rw)
71 atomic_t counter;
72#ifdef CONFIG_PREEMPT
73 unsigned int break_lock;
74#endif
75} rwlock_t;
76
77#define RW_LOCK_BIAS 0x01000000
78#define RW_LOCK_UNLOCKED (rwlock_t) { { 0 }, { RW_LOCK_BIAS } }
79#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while (0)
80
81static inline void _raw_read_lock(rwlock_t *rw)
82{ 62{
83 _raw_spin_lock(&rw->lock); 63 __raw_spin_lock(&rw->lock);
84 64
85 atomic_inc(&rw->counter); 65 atomic_inc(&rw->counter);
86 66
87 _raw_spin_unlock(&rw->lock); 67 __raw_spin_unlock(&rw->lock);
88} 68}
89 69
90static inline void _raw_read_unlock(rwlock_t *rw) 70static inline void __raw_read_unlock(raw_rwlock_t *rw)
91{ 71{
92 _raw_spin_lock(&rw->lock); 72 __raw_spin_lock(&rw->lock);
93 73
94 atomic_dec(&rw->counter); 74 atomic_dec(&rw->counter);
95 75
96 _raw_spin_unlock(&rw->lock); 76 __raw_spin_unlock(&rw->lock);
97} 77}
98 78
99static inline void _raw_write_lock(rwlock_t *rw) 79static inline void __raw_write_lock(raw_rwlock_t *rw)
100{ 80{
101 _raw_spin_lock(&rw->lock); 81 __raw_spin_lock(&rw->lock);
102 atomic_set(&rw->counter, -1); 82 atomic_set(&rw->counter, -1);
103} 83}
104 84
105static inline void _raw_write_unlock(rwlock_t *rw) 85static inline void __raw_write_unlock(raw_rwlock_t *rw)
106{ 86{
107 atomic_set(&rw->counter, 0); 87 atomic_set(&rw->counter, 0);
108 _raw_spin_unlock(&rw->lock); 88 __raw_spin_unlock(&rw->lock);
109} 89}
110 90
111#define _raw_read_trylock(lock) generic_raw_read_trylock(lock) 91#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
112 92
113static inline int _raw_write_trylock(rwlock_t *rw) 93static inline int __raw_write_trylock(raw_rwlock_t *rw)
114{ 94{
115 if (atomic_sub_and_test(RW_LOCK_BIAS, &rw->counter)) 95 if (atomic_sub_and_test(RW_LOCK_BIAS, &rw->counter))
116 return 1; 96 return 1;
@@ -121,4 +101,3 @@ static inline int _raw_write_trylock(rwlock_t *rw)
121} 101}
122 102
123#endif /* __ASM_SH_SPINLOCK_H */ 103#endif /* __ASM_SH_SPINLOCK_H */
124
diff --git a/include/asm-sh/spinlock_types.h b/include/asm-sh/spinlock_types.h
new file mode 100644
index 000000000000..8c41b6c3aac8
--- /dev/null
+++ b/include/asm-sh/spinlock_types.h
@@ -0,0 +1,22 @@
1#ifndef __ASM_SH_SPINLOCK_TYPES_H
2#define __ASM_SH_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 volatile unsigned long lock;
10} raw_spinlock_t;
11
12#define __SPIN_LOCK_UNLOCKED { 0 }
13
14typedef struct {
15 raw_spinlock_t lock;
16 atomic_t counter;
17} raw_rwlock_t;
18
19#define RW_LOCK_BIAS 0x01000000
20#define __RAW_RW_LOCK_UNLOCKED { { 0 }, { RW_LOCK_BIAS } }
21
22#endif
diff --git a/include/asm-sparc/spinlock.h b/include/asm-sparc/spinlock.h
index 0cbd87ad4912..111727a2bb4e 100644
--- a/include/asm-sparc/spinlock.h
+++ b/include/asm-sparc/spinlock.h
@@ -12,96 +12,12 @@
12 12
13#include <asm/psr.h> 13#include <asm/psr.h>
14 14
15#ifdef CONFIG_DEBUG_SPINLOCK 15#define __raw_spin_is_locked(lock) (*((volatile unsigned char *)(lock)) != 0)
16struct _spinlock_debug {
17 unsigned char lock;
18 unsigned long owner_pc;
19#ifdef CONFIG_PREEMPT
20 unsigned int break_lock;
21#endif
22};
23typedef struct _spinlock_debug spinlock_t;
24
25#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0, 0 }
26#define spin_lock_init(lp) do { *(lp)= SPIN_LOCK_UNLOCKED; } while(0)
27#define spin_is_locked(lp) (*((volatile unsigned char *)(&((lp)->lock))) != 0)
28#define spin_unlock_wait(lp) do { barrier(); } while(*(volatile unsigned char *)(&(lp)->lock))
29
30extern void _do_spin_lock(spinlock_t *lock, char *str);
31extern int _spin_trylock(spinlock_t *lock);
32extern void _do_spin_unlock(spinlock_t *lock);
33
34#define _raw_spin_trylock(lp) _spin_trylock(lp)
35#define _raw_spin_lock(lock) _do_spin_lock(lock, "spin_lock")
36#define _raw_spin_unlock(lock) _do_spin_unlock(lock)
37
38struct _rwlock_debug {
39 volatile unsigned int lock;
40 unsigned long owner_pc;
41 unsigned long reader_pc[NR_CPUS];
42#ifdef CONFIG_PREEMPT
43 unsigned int break_lock;
44#endif
45};
46typedef struct _rwlock_debug rwlock_t;
47
48#define RW_LOCK_UNLOCKED (rwlock_t) { 0, 0, {0} }
49
50#define rwlock_init(lp) do { *(lp)= RW_LOCK_UNLOCKED; } while(0)
51
52extern void _do_read_lock(rwlock_t *rw, char *str);
53extern void _do_read_unlock(rwlock_t *rw, char *str);
54extern void _do_write_lock(rwlock_t *rw, char *str);
55extern void _do_write_unlock(rwlock_t *rw);
56
57#define _raw_read_lock(lock) \
58do { unsigned long flags; \
59 local_irq_save(flags); \
60 _do_read_lock(lock, "read_lock"); \
61 local_irq_restore(flags); \
62} while(0)
63
64#define _raw_read_unlock(lock) \
65do { unsigned long flags; \
66 local_irq_save(flags); \
67 _do_read_unlock(lock, "read_unlock"); \
68 local_irq_restore(flags); \
69} while(0)
70
71#define _raw_write_lock(lock) \
72do { unsigned long flags; \
73 local_irq_save(flags); \
74 _do_write_lock(lock, "write_lock"); \
75 local_irq_restore(flags); \
76} while(0)
77
78#define _raw_write_unlock(lock) \
79do { unsigned long flags; \
80 local_irq_save(flags); \
81 _do_write_unlock(lock); \
82 local_irq_restore(flags); \
83} while(0)
84
85#else /* !CONFIG_DEBUG_SPINLOCK */
86
87typedef struct {
88 unsigned char lock;
89#ifdef CONFIG_PREEMPT
90 unsigned int break_lock;
91#endif
92} spinlock_t;
93
94#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 }
95
96#define spin_lock_init(lock) (*((unsigned char *)(lock)) = 0)
97#define spin_is_locked(lock) (*((volatile unsigned char *)(lock)) != 0)
98 16
99#define spin_unlock_wait(lock) \ 17#define __raw_spin_unlock_wait(lock) \
100do { \ 18 do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
101 barrier(); \
102} while(*((volatile unsigned char *)lock))
103 19
104extern __inline__ void _raw_spin_lock(spinlock_t *lock) 20extern __inline__ void __raw_spin_lock(raw_spinlock_t *lock)
105{ 21{
106 __asm__ __volatile__( 22 __asm__ __volatile__(
107 "\n1:\n\t" 23 "\n1:\n\t"
@@ -121,7 +37,7 @@ extern __inline__ void _raw_spin_lock(spinlock_t *lock)
121 : "g2", "memory", "cc"); 37 : "g2", "memory", "cc");
122} 38}
123 39
124extern __inline__ int _raw_spin_trylock(spinlock_t *lock) 40extern __inline__ int __raw_spin_trylock(raw_spinlock_t *lock)
125{ 41{
126 unsigned int result; 42 unsigned int result;
127 __asm__ __volatile__("ldstub [%1], %0" 43 __asm__ __volatile__("ldstub [%1], %0"
@@ -131,7 +47,7 @@ extern __inline__ int _raw_spin_trylock(spinlock_t *lock)
131 return (result == 0); 47 return (result == 0);
132} 48}
133 49
134extern __inline__ void _raw_spin_unlock(spinlock_t *lock) 50extern __inline__ void __raw_spin_unlock(raw_spinlock_t *lock)
135{ 51{
136 __asm__ __volatile__("stb %%g0, [%0]" : : "r" (lock) : "memory"); 52 __asm__ __volatile__("stb %%g0, [%0]" : : "r" (lock) : "memory");
137} 53}
@@ -147,23 +63,11 @@ extern __inline__ void _raw_spin_unlock(spinlock_t *lock)
147 * 63 *
148 * XXX This might create some problems with my dual spinlock 64 * XXX This might create some problems with my dual spinlock
149 * XXX scheme, deadlocks etc. -DaveM 65 * XXX scheme, deadlocks etc. -DaveM
150 */ 66 *
151typedef struct { 67 * Sort of like atomic_t's on Sparc, but even more clever.
152 volatile unsigned int lock;
153#ifdef CONFIG_PREEMPT
154 unsigned int break_lock;
155#endif
156} rwlock_t;
157
158#define RW_LOCK_UNLOCKED (rwlock_t) { 0 }
159
160#define rwlock_init(lp) do { *(lp)= RW_LOCK_UNLOCKED; } while(0)
161
162
163/* Sort of like atomic_t's on Sparc, but even more clever.
164 * 68 *
165 * ------------------------------------ 69 * ------------------------------------
166 * | 24-bit counter | wlock | rwlock_t 70 * | 24-bit counter | wlock | raw_rwlock_t
167 * ------------------------------------ 71 * ------------------------------------
168 * 31 8 7 0 72 * 31 8 7 0
169 * 73 *
@@ -174,9 +78,9 @@ typedef struct {
174 * 78 *
175 * Unfortunately this scheme limits us to ~16,000,000 cpus. 79 * Unfortunately this scheme limits us to ~16,000,000 cpus.
176 */ 80 */
177extern __inline__ void _read_lock(rwlock_t *rw) 81extern __inline__ void __read_lock(raw_rwlock_t *rw)
178{ 82{
179 register rwlock_t *lp asm("g1"); 83 register raw_rwlock_t *lp asm("g1");
180 lp = rw; 84 lp = rw;
181 __asm__ __volatile__( 85 __asm__ __volatile__(
182 "mov %%o7, %%g4\n\t" 86 "mov %%o7, %%g4\n\t"
@@ -187,16 +91,16 @@ extern __inline__ void _read_lock(rwlock_t *rw)
187 : "g2", "g4", "memory", "cc"); 91 : "g2", "g4", "memory", "cc");
188} 92}
189 93
190#define _raw_read_lock(lock) \ 94#define __raw_read_lock(lock) \
191do { unsigned long flags; \ 95do { unsigned long flags; \
192 local_irq_save(flags); \ 96 local_irq_save(flags); \
193 _read_lock(lock); \ 97 __raw_read_lock(lock); \
194 local_irq_restore(flags); \ 98 local_irq_restore(flags); \
195} while(0) 99} while(0)
196 100
197extern __inline__ void _read_unlock(rwlock_t *rw) 101extern __inline__ void __read_unlock(raw_rwlock_t *rw)
198{ 102{
199 register rwlock_t *lp asm("g1"); 103 register raw_rwlock_t *lp asm("g1");
200 lp = rw; 104 lp = rw;
201 __asm__ __volatile__( 105 __asm__ __volatile__(
202 "mov %%o7, %%g4\n\t" 106 "mov %%o7, %%g4\n\t"
@@ -207,16 +111,16 @@ extern __inline__ void _read_unlock(rwlock_t *rw)
207 : "g2", "g4", "memory", "cc"); 111 : "g2", "g4", "memory", "cc");
208} 112}
209 113
210#define _raw_read_unlock(lock) \ 114#define __raw_read_unlock(lock) \
211do { unsigned long flags; \ 115do { unsigned long flags; \
212 local_irq_save(flags); \ 116 local_irq_save(flags); \
213 _read_unlock(lock); \ 117 __raw_read_unlock(lock); \
214 local_irq_restore(flags); \ 118 local_irq_restore(flags); \
215} while(0) 119} while(0)
216 120
217extern __inline__ void _raw_write_lock(rwlock_t *rw) 121extern __inline__ void __raw_write_lock(raw_rwlock_t *rw)
218{ 122{
219 register rwlock_t *lp asm("g1"); 123 register raw_rwlock_t *lp asm("g1");
220 lp = rw; 124 lp = rw;
221 __asm__ __volatile__( 125 __asm__ __volatile__(
222 "mov %%o7, %%g4\n\t" 126 "mov %%o7, %%g4\n\t"
@@ -227,11 +131,9 @@ extern __inline__ void _raw_write_lock(rwlock_t *rw)
227 : "g2", "g4", "memory", "cc"); 131 : "g2", "g4", "memory", "cc");
228} 132}
229 133
230#define _raw_write_unlock(rw) do { (rw)->lock = 0; } while(0) 134#define __raw_write_unlock(rw) do { (rw)->lock = 0; } while(0)
231
232#endif /* CONFIG_DEBUG_SPINLOCK */
233 135
234#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock) 136#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
235 137
236#endif /* !(__ASSEMBLY__) */ 138#endif /* !(__ASSEMBLY__) */
237 139
diff --git a/include/asm-sparc/spinlock_types.h b/include/asm-sparc/spinlock_types.h
new file mode 100644
index 000000000000..0a0fb116c4ec
--- /dev/null
+++ b/include/asm-sparc/spinlock_types.h
@@ -0,0 +1,20 @@
1#ifndef __SPARC_SPINLOCK_TYPES_H
2#define __SPARC_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 unsigned char lock;
10} raw_spinlock_t;
11
12#define __RAW_SPIN_LOCK_UNLOCKED { 0 }
13
14typedef struct {
15 volatile unsigned int lock;
16} raw_rwlock_t;
17
18#define __RAW_RW_LOCK_UNLOCKED { 0 }
19
20#endif
diff --git a/include/asm-sparc64/spinlock.h b/include/asm-sparc64/spinlock.h
index a02c4370eb42..ec85d12d73b9 100644
--- a/include/asm-sparc64/spinlock.h
+++ b/include/asm-sparc64/spinlock.h
@@ -29,24 +29,13 @@
29 * must be pre-V9 branches. 29 * must be pre-V9 branches.
30 */ 30 */
31 31
32#ifndef CONFIG_DEBUG_SPINLOCK 32#define __raw_spin_is_locked(lp) ((lp)->lock != 0)
33 33
34typedef struct { 34#define __raw_spin_unlock_wait(lp) \
35 volatile unsigned char lock; 35 do { rmb(); \
36#ifdef CONFIG_PREEMPT 36 } while((lp)->lock)
37 unsigned int break_lock;
38#endif
39} spinlock_t;
40#define SPIN_LOCK_UNLOCKED (spinlock_t) {0,}
41 37
42#define spin_lock_init(lp) do { *(lp)= SPIN_LOCK_UNLOCKED; } while(0) 38static inline void __raw_spin_lock(raw_spinlock_t *lock)
43#define spin_is_locked(lp) ((lp)->lock != 0)
44
45#define spin_unlock_wait(lp) \
46do { rmb(); \
47} while((lp)->lock)
48
49static inline void _raw_spin_lock(spinlock_t *lock)
50{ 39{
51 unsigned long tmp; 40 unsigned long tmp;
52 41
@@ -67,7 +56,7 @@ static inline void _raw_spin_lock(spinlock_t *lock)
67 : "memory"); 56 : "memory");
68} 57}
69 58
70static inline int _raw_spin_trylock(spinlock_t *lock) 59static inline int __raw_spin_trylock(raw_spinlock_t *lock)
71{ 60{
72 unsigned long result; 61 unsigned long result;
73 62
@@ -81,7 +70,7 @@ static inline int _raw_spin_trylock(spinlock_t *lock)
81 return (result == 0UL); 70 return (result == 0UL);
82} 71}
83 72
84static inline void _raw_spin_unlock(spinlock_t *lock) 73static inline void __raw_spin_unlock(raw_spinlock_t *lock)
85{ 74{
86 __asm__ __volatile__( 75 __asm__ __volatile__(
87" membar #StoreStore | #LoadStore\n" 76" membar #StoreStore | #LoadStore\n"
@@ -91,7 +80,7 @@ static inline void _raw_spin_unlock(spinlock_t *lock)
91 : "memory"); 80 : "memory");
92} 81}
93 82
94static inline void _raw_spin_lock_flags(spinlock_t *lock, unsigned long flags) 83static inline void __raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long flags)
95{ 84{
96 unsigned long tmp1, tmp2; 85 unsigned long tmp1, tmp2;
97 86
@@ -115,51 +104,9 @@ static inline void _raw_spin_lock_flags(spinlock_t *lock, unsigned long flags)
115 : "memory"); 104 : "memory");
116} 105}
117 106
118#else /* !(CONFIG_DEBUG_SPINLOCK) */
119
120typedef struct {
121 volatile unsigned char lock;
122 unsigned int owner_pc, owner_cpu;
123#ifdef CONFIG_PREEMPT
124 unsigned int break_lock;
125#endif
126} spinlock_t;
127#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0, 0, 0xff }
128#define spin_lock_init(lp) do { *(lp)= SPIN_LOCK_UNLOCKED; } while(0)
129#define spin_is_locked(__lock) ((__lock)->lock != 0)
130#define spin_unlock_wait(__lock) \
131do { \
132 rmb(); \
133} while((__lock)->lock)
134
135extern void _do_spin_lock(spinlock_t *lock, char *str, unsigned long caller);
136extern void _do_spin_unlock(spinlock_t *lock);
137extern int _do_spin_trylock(spinlock_t *lock, unsigned long caller);
138
139#define _raw_spin_trylock(lp) \
140 _do_spin_trylock(lp, (unsigned long) __builtin_return_address(0))
141#define _raw_spin_lock(lock) \
142 _do_spin_lock(lock, "spin_lock", \
143 (unsigned long) __builtin_return_address(0))
144#define _raw_spin_unlock(lock) _do_spin_unlock(lock)
145#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
146
147#endif /* CONFIG_DEBUG_SPINLOCK */
148
149/* Multi-reader locks, these are much saner than the 32-bit Sparc ones... */ 107/* Multi-reader locks, these are much saner than the 32-bit Sparc ones... */
150 108
151#ifndef CONFIG_DEBUG_SPINLOCK 109static void inline __read_lock(raw_rwlock_t *lock)
152
153typedef struct {
154 volatile unsigned int lock;
155#ifdef CONFIG_PREEMPT
156 unsigned int break_lock;
157#endif
158} rwlock_t;
159#define RW_LOCK_UNLOCKED (rwlock_t) {0,}
160#define rwlock_init(lp) do { *(lp) = RW_LOCK_UNLOCKED; } while(0)
161
162static void inline __read_lock(rwlock_t *lock)
163{ 110{
164 unsigned long tmp1, tmp2; 111 unsigned long tmp1, tmp2;
165 112
@@ -184,7 +131,7 @@ static void inline __read_lock(rwlock_t *lock)
184 : "memory"); 131 : "memory");
185} 132}
186 133
187static void inline __read_unlock(rwlock_t *lock) 134static void inline __read_unlock(raw_rwlock_t *lock)
188{ 135{
189 unsigned long tmp1, tmp2; 136 unsigned long tmp1, tmp2;
190 137
@@ -201,7 +148,7 @@ static void inline __read_unlock(rwlock_t *lock)
201 : "memory"); 148 : "memory");
202} 149}
203 150
204static void inline __write_lock(rwlock_t *lock) 151static void inline __write_lock(raw_rwlock_t *lock)
205{ 152{
206 unsigned long mask, tmp1, tmp2; 153 unsigned long mask, tmp1, tmp2;
207 154
@@ -228,7 +175,7 @@ static void inline __write_lock(rwlock_t *lock)
228 : "memory"); 175 : "memory");
229} 176}
230 177
231static void inline __write_unlock(rwlock_t *lock) 178static void inline __write_unlock(raw_rwlock_t *lock)
232{ 179{
233 __asm__ __volatile__( 180 __asm__ __volatile__(
234" membar #LoadStore | #StoreStore\n" 181" membar #LoadStore | #StoreStore\n"
@@ -238,7 +185,7 @@ static void inline __write_unlock(rwlock_t *lock)
238 : "memory"); 185 : "memory");
239} 186}
240 187
241static int inline __write_trylock(rwlock_t *lock) 188static int inline __write_trylock(raw_rwlock_t *lock)
242{ 189{
243 unsigned long mask, tmp1, tmp2, result; 190 unsigned long mask, tmp1, tmp2, result;
244 191
@@ -263,78 +210,15 @@ static int inline __write_trylock(rwlock_t *lock)
263 return result; 210 return result;
264} 211}
265 212
266#define _raw_read_lock(p) __read_lock(p) 213#define __raw_read_lock(p) __read_lock(p)
267#define _raw_read_unlock(p) __read_unlock(p) 214#define __raw_read_unlock(p) __read_unlock(p)
268#define _raw_write_lock(p) __write_lock(p) 215#define __raw_write_lock(p) __write_lock(p)
269#define _raw_write_unlock(p) __write_unlock(p) 216#define __raw_write_unlock(p) __write_unlock(p)
270#define _raw_write_trylock(p) __write_trylock(p) 217#define __raw_write_trylock(p) __write_trylock(p)
271 218
272#else /* !(CONFIG_DEBUG_SPINLOCK) */ 219#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
273 220#define __raw_read_can_lock(rw) (!((rw)->lock & 0x80000000UL))
274typedef struct { 221#define __raw_write_can_lock(rw) (!(rw)->lock)
275 volatile unsigned long lock;
276 unsigned int writer_pc, writer_cpu;
277 unsigned int reader_pc[NR_CPUS];
278#ifdef CONFIG_PREEMPT
279 unsigned int break_lock;
280#endif
281} rwlock_t;
282#define RW_LOCK_UNLOCKED (rwlock_t) { 0, 0, 0xff, { } }
283#define rwlock_init(lp) do { *(lp) = RW_LOCK_UNLOCKED; } while(0)
284
285extern void _do_read_lock(rwlock_t *rw, char *str, unsigned long caller);
286extern void _do_read_unlock(rwlock_t *rw, char *str, unsigned long caller);
287extern void _do_write_lock(rwlock_t *rw, char *str, unsigned long caller);
288extern void _do_write_unlock(rwlock_t *rw, unsigned long caller);
289extern int _do_write_trylock(rwlock_t *rw, char *str, unsigned long caller);
290
291#define _raw_read_lock(lock) \
292do { unsigned long flags; \
293 local_irq_save(flags); \
294 _do_read_lock(lock, "read_lock", \
295 (unsigned long) __builtin_return_address(0)); \
296 local_irq_restore(flags); \
297} while(0)
298
299#define _raw_read_unlock(lock) \
300do { unsigned long flags; \
301 local_irq_save(flags); \
302 _do_read_unlock(lock, "read_unlock", \
303 (unsigned long) __builtin_return_address(0)); \
304 local_irq_restore(flags); \
305} while(0)
306
307#define _raw_write_lock(lock) \
308do { unsigned long flags; \
309 local_irq_save(flags); \
310 _do_write_lock(lock, "write_lock", \
311 (unsigned long) __builtin_return_address(0)); \
312 local_irq_restore(flags); \
313} while(0)
314
315#define _raw_write_unlock(lock) \
316do { unsigned long flags; \
317 local_irq_save(flags); \
318 _do_write_unlock(lock, \
319 (unsigned long) __builtin_return_address(0)); \
320 local_irq_restore(flags); \
321} while(0)
322
323#define _raw_write_trylock(lock) \
324({ unsigned long flags; \
325 int val; \
326 local_irq_save(flags); \
327 val = _do_write_trylock(lock, "write_trylock", \
328 (unsigned long) __builtin_return_address(0)); \
329 local_irq_restore(flags); \
330 val; \
331})
332
333#endif /* CONFIG_DEBUG_SPINLOCK */
334
335#define _raw_read_trylock(lock) generic_raw_read_trylock(lock)
336#define read_can_lock(rw) (!((rw)->lock & 0x80000000UL))
337#define write_can_lock(rw) (!(rw)->lock)
338 222
339#endif /* !(__ASSEMBLY__) */ 223#endif /* !(__ASSEMBLY__) */
340 224
diff --git a/include/asm-sparc64/spinlock_types.h b/include/asm-sparc64/spinlock_types.h
new file mode 100644
index 000000000000..e128112a0d7c
--- /dev/null
+++ b/include/asm-sparc64/spinlock_types.h
@@ -0,0 +1,20 @@
1#ifndef __SPARC64_SPINLOCK_TYPES_H
2#define __SPARC64_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 volatile unsigned char lock;
10} raw_spinlock_t;
11
12#define __RAW_SPIN_LOCK_UNLOCKED { 0 }
13
14typedef struct {
15 volatile unsigned int lock;
16} raw_rwlock_t;
17
18#define __RAW_RW_LOCK_UNLOCKED { 0 }
19
20#endif
diff --git a/include/asm-x86_64/spinlock.h b/include/asm-x86_64/spinlock.h
index 5aeb57a3baad..69636831ad2f 100644
--- a/include/asm-x86_64/spinlock.h
+++ b/include/asm-x86_64/spinlock.h
@@ -6,47 +6,21 @@
6#include <asm/page.h> 6#include <asm/page.h>
7#include <linux/config.h> 7#include <linux/config.h>
8 8
9extern int printk(const char * fmt, ...)
10 __attribute__ ((format (printf, 1, 2)));
11
12/* 9/*
13 * Your basic SMP spinlocks, allowing only a single CPU anywhere 10 * Your basic SMP spinlocks, allowing only a single CPU anywhere
14 */ 11 *
15
16typedef struct {
17 volatile unsigned int lock;
18#ifdef CONFIG_DEBUG_SPINLOCK
19 unsigned magic;
20#endif
21#ifdef CONFIG_PREEMPT
22 unsigned int break_lock;
23#endif
24} spinlock_t;
25
26#define SPINLOCK_MAGIC 0xdead4ead
27
28#ifdef CONFIG_DEBUG_SPINLOCK
29#define SPINLOCK_MAGIC_INIT , SPINLOCK_MAGIC
30#else
31#define SPINLOCK_MAGIC_INIT /* */
32#endif
33
34#define SPIN_LOCK_UNLOCKED (spinlock_t) { 1 SPINLOCK_MAGIC_INIT }
35
36#define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while(0)
37
38/*
39 * Simple spin lock operations. There are two variants, one clears IRQ's 12 * Simple spin lock operations. There are two variants, one clears IRQ's
40 * on the local processor, one does not. 13 * on the local processor, one does not.
41 * 14 *
42 * We make no fairness assumptions. They have a cost. 15 * We make no fairness assumptions. They have a cost.
16 *
17 * (the type definitions are in asm/spinlock_types.h)
43 */ 18 */
44 19
45#define spin_is_locked(x) (*(volatile signed char *)(&(x)->lock) <= 0) 20#define __raw_spin_is_locked(x) \
46#define spin_unlock_wait(x) do { barrier(); } while(spin_is_locked(x)) 21 (*(volatile signed char *)(&(x)->slock) <= 0)
47#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
48 22
49#define spin_lock_string \ 23#define __raw_spin_lock_string \
50 "\n1:\t" \ 24 "\n1:\t" \
51 "lock ; decb %0\n\t" \ 25 "lock ; decb %0\n\t" \
52 "js 2f\n" \ 26 "js 2f\n" \
@@ -58,74 +32,40 @@ typedef struct {
58 "jmp 1b\n" \ 32 "jmp 1b\n" \
59 LOCK_SECTION_END 33 LOCK_SECTION_END
60 34
61/* 35#define __raw_spin_unlock_string \
62 * This works. Despite all the confusion.
63 * (except on PPro SMP or if we are using OOSTORE)
64 * (PPro errata 66, 92)
65 */
66
67#if !defined(CONFIG_X86_OOSTORE) && !defined(CONFIG_X86_PPRO_FENCE)
68
69#define spin_unlock_string \
70 "movb $1,%0" \ 36 "movb $1,%0" \
71 :"=m" (lock->lock) : : "memory" 37 :"=m" (lock->slock) : : "memory"
72
73
74static inline void _raw_spin_unlock(spinlock_t *lock)
75{
76#ifdef CONFIG_DEBUG_SPINLOCK
77 BUG_ON(lock->magic != SPINLOCK_MAGIC);
78 assert_spin_locked(lock);
79#endif
80 __asm__ __volatile__(
81 spin_unlock_string
82 );
83}
84
85#else
86
87#define spin_unlock_string \
88 "xchgb %b0, %1" \
89 :"=q" (oldval), "=m" (lock->lock) \
90 :"0" (oldval) : "memory"
91 38
92static inline void _raw_spin_unlock(spinlock_t *lock) 39static inline void __raw_spin_lock(raw_spinlock_t *lock)
93{ 40{
94 char oldval = 1;
95#ifdef CONFIG_DEBUG_SPINLOCK
96 BUG_ON(lock->magic != SPINLOCK_MAGIC);
97 assert_spin_locked(lock);
98#endif
99 __asm__ __volatile__( 41 __asm__ __volatile__(
100 spin_unlock_string 42 __raw_spin_lock_string
101 ); 43 :"=m" (lock->slock) : : "memory");
102} 44}
103 45
104#endif 46#define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
105 47
106static inline int _raw_spin_trylock(spinlock_t *lock) 48static inline int __raw_spin_trylock(raw_spinlock_t *lock)
107{ 49{
108 char oldval; 50 char oldval;
51
109 __asm__ __volatile__( 52 __asm__ __volatile__(
110 "xchgb %b0,%1" 53 "xchgb %b0,%1"
111 :"=q" (oldval), "=m" (lock->lock) 54 :"=q" (oldval), "=m" (lock->slock)
112 :"0" (0) : "memory"); 55 :"0" (0) : "memory");
56
113 return oldval > 0; 57 return oldval > 0;
114} 58}
115 59
116static inline void _raw_spin_lock(spinlock_t *lock) 60static inline void __raw_spin_unlock(raw_spinlock_t *lock)
117{ 61{
118#ifdef CONFIG_DEBUG_SPINLOCK
119 if (lock->magic != SPINLOCK_MAGIC) {
120 printk("eip: %p\n", __builtin_return_address(0));
121 BUG();
122 }
123#endif
124 __asm__ __volatile__( 62 __asm__ __volatile__(
125 spin_lock_string 63 __raw_spin_unlock_string
126 :"=m" (lock->lock) : : "memory"); 64 );
127} 65}
128 66
67#define __raw_spin_unlock_wait(lock) \
68 do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
129 69
130/* 70/*
131 * Read-write spinlocks, allowing multiple readers 71 * Read-write spinlocks, allowing multiple readers
@@ -136,33 +76,7 @@ static inline void _raw_spin_lock(spinlock_t *lock)
136 * can "mix" irq-safe locks - any writer needs to get a 76 * can "mix" irq-safe locks - any writer needs to get a
137 * irq-safe write-lock, but readers can get non-irqsafe 77 * irq-safe write-lock, but readers can get non-irqsafe
138 * read-locks. 78 * read-locks.
139 */ 79 *
140typedef struct {
141 volatile unsigned int lock;
142#ifdef CONFIG_DEBUG_SPINLOCK
143 unsigned magic;
144#endif
145#ifdef CONFIG_PREEMPT
146 unsigned int break_lock;
147#endif
148} rwlock_t;
149
150#define RWLOCK_MAGIC 0xdeaf1eed
151
152#ifdef CONFIG_DEBUG_SPINLOCK
153#define RWLOCK_MAGIC_INIT , RWLOCK_MAGIC
154#else
155#define RWLOCK_MAGIC_INIT /* */
156#endif
157
158#define RW_LOCK_UNLOCKED (rwlock_t) { RW_LOCK_BIAS RWLOCK_MAGIC_INIT }
159
160#define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while(0)
161
162#define read_can_lock(x) ((int)(x)->lock > 0)
163#define write_can_lock(x) ((x)->lock == RW_LOCK_BIAS)
164
165/*
166 * On x86, we implement read-write locks as a 32-bit counter 80 * On x86, we implement read-write locks as a 32-bit counter
167 * with the high bit (sign) being the "contended" bit. 81 * with the high bit (sign) being the "contended" bit.
168 * 82 *
@@ -170,29 +84,24 @@ typedef struct {
170 * 84 *
171 * Changed to use the same technique as rw semaphores. See 85 * Changed to use the same technique as rw semaphores. See
172 * semaphore.h for details. -ben 86 * semaphore.h for details. -ben
87 *
88 * the helpers are in arch/i386/kernel/semaphore.c
173 */ 89 */
174/* the spinlock helpers are in arch/i386/kernel/semaphore.c */
175 90
176static inline void _raw_read_lock(rwlock_t *rw) 91#define __raw_read_can_lock(x) ((int)(x)->lock > 0)
92#define __raw_write_can_lock(x) ((x)->lock == RW_LOCK_BIAS)
93
94static inline void __raw_read_lock(raw_rwlock_t *rw)
177{ 95{
178#ifdef CONFIG_DEBUG_SPINLOCK
179 BUG_ON(rw->magic != RWLOCK_MAGIC);
180#endif
181 __build_read_lock(rw, "__read_lock_failed"); 96 __build_read_lock(rw, "__read_lock_failed");
182} 97}
183 98
184static inline void _raw_write_lock(rwlock_t *rw) 99static inline void __raw_write_lock(raw_rwlock_t *rw)
185{ 100{
186#ifdef CONFIG_DEBUG_SPINLOCK
187 BUG_ON(rw->magic != RWLOCK_MAGIC);
188#endif
189 __build_write_lock(rw, "__write_lock_failed"); 101 __build_write_lock(rw, "__write_lock_failed");
190} 102}
191 103
192#define _raw_read_unlock(rw) asm volatile("lock ; incl %0" :"=m" ((rw)->lock) : : "memory") 104static inline int __raw_read_trylock(raw_rwlock_t *lock)
193#define _raw_write_unlock(rw) asm volatile("lock ; addl $" RW_LOCK_BIAS_STR ",%0":"=m" ((rw)->lock) : : "memory")
194
195static inline int _raw_read_trylock(rwlock_t *lock)
196{ 105{
197 atomic_t *count = (atomic_t *)lock; 106 atomic_t *count = (atomic_t *)lock;
198 atomic_dec(count); 107 atomic_dec(count);
@@ -202,7 +111,7 @@ static inline int _raw_read_trylock(rwlock_t *lock)
202 return 0; 111 return 0;
203} 112}
204 113
205static inline int _raw_write_trylock(rwlock_t *lock) 114static inline int __raw_write_trylock(raw_rwlock_t *lock)
206{ 115{
207 atomic_t *count = (atomic_t *)lock; 116 atomic_t *count = (atomic_t *)lock;
208 if (atomic_sub_and_test(RW_LOCK_BIAS, count)) 117 if (atomic_sub_and_test(RW_LOCK_BIAS, count))
@@ -211,4 +120,15 @@ static inline int _raw_write_trylock(rwlock_t *lock)
211 return 0; 120 return 0;
212} 121}
213 122
123static inline void __raw_read_unlock(raw_rwlock_t *rw)
124{
125 asm volatile("lock ; incl %0" :"=m" (rw->lock) : : "memory");
126}
127
128static inline void __raw_write_unlock(raw_rwlock_t *rw)
129{
130 asm volatile("lock ; addl $" RW_LOCK_BIAS_STR ",%0"
131 : "=m" (rw->lock) : : "memory");
132}
133
214#endif /* __ASM_SPINLOCK_H */ 134#endif /* __ASM_SPINLOCK_H */
diff --git a/include/asm-x86_64/spinlock_types.h b/include/asm-x86_64/spinlock_types.h
new file mode 100644
index 000000000000..59efe849f351
--- /dev/null
+++ b/include/asm-x86_64/spinlock_types.h
@@ -0,0 +1,20 @@
1#ifndef __ASM_SPINLOCK_TYPES_H
2#define __ASM_SPINLOCK_TYPES_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8typedef struct {
9 volatile unsigned int slock;
10} raw_spinlock_t;
11
12#define __RAW_SPIN_LOCK_UNLOCKED { 1 }
13
14typedef struct {
15 volatile unsigned int lock;
16} raw_rwlock_t;
17
18#define __RAW_RW_LOCK_UNLOCKED { RW_LOCK_BIAS }
19
20#endif
diff --git a/include/linux/bit_spinlock.h b/include/linux/bit_spinlock.h
new file mode 100644
index 000000000000..6b20af0bbb79
--- /dev/null
+++ b/include/linux/bit_spinlock.h
@@ -0,0 +1,77 @@
1#ifndef __LINUX_BIT_SPINLOCK_H
2#define __LINUX_BIT_SPINLOCK_H
3
4/*
5 * bit-based spin_lock()
6 *
7 * Don't use this unless you really need to: spin_lock() and spin_unlock()
8 * are significantly faster.
9 */
10static inline void bit_spin_lock(int bitnum, unsigned long *addr)
11{
12 /*
13 * Assuming the lock is uncontended, this never enters
14 * the body of the outer loop. If it is contended, then
15 * within the inner loop a non-atomic test is used to
16 * busywait with less bus contention for a good time to
17 * attempt to acquire the lock bit.
18 */
19 preempt_disable();
20#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
21 while (test_and_set_bit(bitnum, addr)) {
22 while (test_bit(bitnum, addr)) {
23 preempt_enable();
24 cpu_relax();
25 preempt_disable();
26 }
27 }
28#endif
29 __acquire(bitlock);
30}
31
32/*
33 * Return true if it was acquired
34 */
35static inline int bit_spin_trylock(int bitnum, unsigned long *addr)
36{
37 preempt_disable();
38#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
39 if (test_and_set_bit(bitnum, addr)) {
40 preempt_enable();
41 return 0;
42 }
43#endif
44 __acquire(bitlock);
45 return 1;
46}
47
48/*
49 * bit-based spin_unlock()
50 */
51static inline void bit_spin_unlock(int bitnum, unsigned long *addr)
52{
53#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
54 BUG_ON(!test_bit(bitnum, addr));
55 smp_mb__before_clear_bit();
56 clear_bit(bitnum, addr);
57#endif
58 preempt_enable();
59 __release(bitlock);
60}
61
62/*
63 * Return true if the lock is held.
64 */
65static inline int bit_spin_is_locked(int bitnum, unsigned long *addr)
66{
67#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
68 return test_bit(bitnum, addr);
69#elif defined CONFIG_PREEMPT
70 return preempt_count();
71#else
72 return 1;
73#endif
74}
75
76#endif /* __LINUX_BIT_SPINLOCK_H */
77
diff --git a/include/linux/jbd.h b/include/linux/jbd.h
index 84321a4cac93..de097269bd7f 100644
--- a/include/linux/jbd.h
+++ b/include/linux/jbd.h
@@ -28,6 +28,7 @@
28#include <linux/buffer_head.h> 28#include <linux/buffer_head.h>
29#include <linux/journal-head.h> 29#include <linux/journal-head.h>
30#include <linux/stddef.h> 30#include <linux/stddef.h>
31#include <linux/bit_spinlock.h>
31#include <asm/semaphore.h> 32#include <asm/semaphore.h>
32#endif 33#endif
33 34
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index d6ba068719b6..cdc99a27840d 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -2,7 +2,48 @@
2#define __LINUX_SPINLOCK_H 2#define __LINUX_SPINLOCK_H
3 3
4/* 4/*
5 * include/linux/spinlock.h - generic locking declarations 5 * include/linux/spinlock.h - generic spinlock/rwlock declarations
6 *
7 * here's the role of the various spinlock/rwlock related include files:
8 *
9 * on SMP builds:
10 *
11 * asm/spinlock_types.h: contains the raw_spinlock_t/raw_rwlock_t and the
12 * initializers
13 *
14 * linux/spinlock_types.h:
15 * defines the generic type and initializers
16 *
17 * asm/spinlock.h: contains the __raw_spin_*()/etc. lowlevel
18 * implementations, mostly inline assembly code
19 *
20 * (also included on UP-debug builds:)
21 *
22 * linux/spinlock_api_smp.h:
23 * contains the prototypes for the _spin_*() APIs.
24 *
25 * linux/spinlock.h: builds the final spin_*() APIs.
26 *
27 * on UP builds:
28 *
29 * linux/spinlock_type_up.h:
30 * contains the generic, simplified UP spinlock type.
31 * (which is an empty structure on non-debug builds)
32 *
33 * linux/spinlock_types.h:
34 * defines the generic type and initializers
35 *
36 * linux/spinlock_up.h:
37 * contains the __raw_spin_*()/etc. version of UP
38 * builds. (which are NOPs on non-debug, non-preempt
39 * builds)
40 *
41 * (included on UP-non-debug builds:)
42 *
43 * linux/spinlock_api_up.h:
44 * builds the _spin_*() APIs.
45 *
46 * linux/spinlock.h: builds the final spin_*() APIs.
6 */ 47 */
7 48
8#include <linux/config.h> 49#include <linux/config.h>
@@ -13,7 +54,6 @@
13#include <linux/kernel.h> 54#include <linux/kernel.h>
14#include <linux/stringify.h> 55#include <linux/stringify.h>
15 56
16#include <asm/processor.h> /* for cpu relax */
17#include <asm/system.h> 57#include <asm/system.h>
18 58
19/* 59/*
@@ -35,423 +75,84 @@
35#define __lockfunc fastcall __attribute__((section(".spinlock.text"))) 75#define __lockfunc fastcall __attribute__((section(".spinlock.text")))
36 76
37/* 77/*
38 * If CONFIG_SMP is set, pull in the _raw_* definitions 78 * Pull the raw_spinlock_t and raw_rwlock_t definitions:
39 */ 79 */
40#ifdef CONFIG_SMP 80#include <linux/spinlock_types.h>
41
42#define assert_spin_locked(x) BUG_ON(!spin_is_locked(x))
43#include <asm/spinlock.h>
44
45int __lockfunc _spin_trylock(spinlock_t *lock);
46int __lockfunc _read_trylock(rwlock_t *lock);
47int __lockfunc _write_trylock(rwlock_t *lock);
48
49void __lockfunc _spin_lock(spinlock_t *lock) __acquires(spinlock_t);
50void __lockfunc _read_lock(rwlock_t *lock) __acquires(rwlock_t);
51void __lockfunc _write_lock(rwlock_t *lock) __acquires(rwlock_t);
52
53void __lockfunc _spin_unlock(spinlock_t *lock) __releases(spinlock_t);
54void __lockfunc _read_unlock(rwlock_t *lock) __releases(rwlock_t);
55void __lockfunc _write_unlock(rwlock_t *lock) __releases(rwlock_t);
56
57unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock) __acquires(spinlock_t);
58unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock) __acquires(rwlock_t);
59unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock) __acquires(rwlock_t);
60
61void __lockfunc _spin_lock_irq(spinlock_t *lock) __acquires(spinlock_t);
62void __lockfunc _spin_lock_bh(spinlock_t *lock) __acquires(spinlock_t);
63void __lockfunc _read_lock_irq(rwlock_t *lock) __acquires(rwlock_t);
64void __lockfunc _read_lock_bh(rwlock_t *lock) __acquires(rwlock_t);
65void __lockfunc _write_lock_irq(rwlock_t *lock) __acquires(rwlock_t);
66void __lockfunc _write_lock_bh(rwlock_t *lock) __acquires(rwlock_t);
67
68void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags) __releases(spinlock_t);
69void __lockfunc _spin_unlock_irq(spinlock_t *lock) __releases(spinlock_t);
70void __lockfunc _spin_unlock_bh(spinlock_t *lock) __releases(spinlock_t);
71void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags) __releases(rwlock_t);
72void __lockfunc _read_unlock_irq(rwlock_t *lock) __releases(rwlock_t);
73void __lockfunc _read_unlock_bh(rwlock_t *lock) __releases(rwlock_t);
74void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags) __releases(rwlock_t);
75void __lockfunc _write_unlock_irq(rwlock_t *lock) __releases(rwlock_t);
76void __lockfunc _write_unlock_bh(rwlock_t *lock) __releases(rwlock_t);
77
78int __lockfunc _spin_trylock_bh(spinlock_t *lock);
79int __lockfunc generic_raw_read_trylock(rwlock_t *lock);
80int in_lock_functions(unsigned long addr);
81
82#else
83 81
84#define in_lock_functions(ADDR) 0 82extern int __lockfunc generic__raw_read_trylock(raw_rwlock_t *lock);
85 83
86#if !defined(CONFIG_PREEMPT) && !defined(CONFIG_DEBUG_SPINLOCK)
87# define _atomic_dec_and_lock(atomic,lock) atomic_dec_and_test(atomic)
88# define ATOMIC_DEC_AND_LOCK
89#endif
90
91#ifdef CONFIG_DEBUG_SPINLOCK
92
93#define SPINLOCK_MAGIC 0x1D244B3C
94typedef struct {
95 unsigned long magic;
96 volatile unsigned long lock;
97 volatile unsigned int babble;
98 const char *module;
99 char *owner;
100 int oline;
101} spinlock_t;
102#define SPIN_LOCK_UNLOCKED (spinlock_t) { SPINLOCK_MAGIC, 0, 10, __FILE__ , NULL, 0}
103
104#define spin_lock_init(x) \
105 do { \
106 (x)->magic = SPINLOCK_MAGIC; \
107 (x)->lock = 0; \
108 (x)->babble = 5; \
109 (x)->module = __FILE__; \
110 (x)->owner = NULL; \
111 (x)->oline = 0; \
112 } while (0)
113
114#define CHECK_LOCK(x) \
115 do { \
116 if ((x)->magic != SPINLOCK_MAGIC) { \
117 printk(KERN_ERR "%s:%d: spin_is_locked on uninitialized spinlock %p.\n", \
118 __FILE__, __LINE__, (x)); \
119 } \
120 } while(0)
121
122#define _raw_spin_lock(x) \
123 do { \
124 CHECK_LOCK(x); \
125 if ((x)->lock&&(x)->babble) { \
126 (x)->babble--; \
127 printk("%s:%d: spin_lock(%s:%p) already locked by %s/%d\n", \
128 __FILE__,__LINE__, (x)->module, \
129 (x), (x)->owner, (x)->oline); \
130 } \
131 (x)->lock = 1; \
132 (x)->owner = __FILE__; \
133 (x)->oline = __LINE__; \
134 } while (0)
135
136/* without debugging, spin_is_locked on UP always says
137 * FALSE. --> printk if already locked. */
138#define spin_is_locked(x) \
139 ({ \
140 CHECK_LOCK(x); \
141 if ((x)->lock&&(x)->babble) { \
142 (x)->babble--; \
143 printk("%s:%d: spin_is_locked(%s:%p) already locked by %s/%d\n", \
144 __FILE__,__LINE__, (x)->module, \
145 (x), (x)->owner, (x)->oline); \
146 } \
147 0; \
148 })
149
150/* with debugging, assert_spin_locked() on UP does check
151 * the lock value properly */
152#define assert_spin_locked(x) \
153 ({ \
154 CHECK_LOCK(x); \
155 BUG_ON(!(x)->lock); \
156 })
157
158/* without debugging, spin_trylock on UP always says
159 * TRUE. --> printk if already locked. */
160#define _raw_spin_trylock(x) \
161 ({ \
162 CHECK_LOCK(x); \
163 if ((x)->lock&&(x)->babble) { \
164 (x)->babble--; \
165 printk("%s:%d: spin_trylock(%s:%p) already locked by %s/%d\n", \
166 __FILE__,__LINE__, (x)->module, \
167 (x), (x)->owner, (x)->oline); \
168 } \
169 (x)->lock = 1; \
170 (x)->owner = __FILE__; \
171 (x)->oline = __LINE__; \
172 1; \
173 })
174
175#define spin_unlock_wait(x) \
176 do { \
177 CHECK_LOCK(x); \
178 if ((x)->lock&&(x)->babble) { \
179 (x)->babble--; \
180 printk("%s:%d: spin_unlock_wait(%s:%p) owned by %s/%d\n", \
181 __FILE__,__LINE__, (x)->module, (x), \
182 (x)->owner, (x)->oline); \
183 }\
184 } while (0)
185
186#define _raw_spin_unlock(x) \
187 do { \
188 CHECK_LOCK(x); \
189 if (!(x)->lock&&(x)->babble) { \
190 (x)->babble--; \
191 printk("%s:%d: spin_unlock(%s:%p) not locked\n", \
192 __FILE__,__LINE__, (x)->module, (x));\
193 } \
194 (x)->lock = 0; \
195 } while (0)
196#else
197/* 84/*
198 * gcc versions before ~2.95 have a nasty bug with empty initializers. 85 * Pull the __raw*() functions/declarations (UP-nondebug doesnt need them):
199 */ 86 */
200#if (__GNUC__ > 2) 87#if defined(CONFIG_SMP)
201 typedef struct { } spinlock_t; 88# include <asm/spinlock.h>
202 #define SPIN_LOCK_UNLOCKED (spinlock_t) { }
203#else 89#else
204 typedef struct { int gcc_is_buggy; } spinlock_t; 90# include <linux/spinlock_up.h>
205 #define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 }
206#endif 91#endif
207 92
93#define spin_lock_init(lock) do { *(lock) = SPIN_LOCK_UNLOCKED; } while (0)
94#define rwlock_init(lock) do { *(lock) = RW_LOCK_UNLOCKED; } while (0)
95
96#define spin_is_locked(lock) __raw_spin_is_locked(&(lock)->raw_lock)
97
98/**
99 * spin_unlock_wait - wait until the spinlock gets unlocked
100 * @lock: the spinlock in question.
101 */
102#define spin_unlock_wait(lock) __raw_spin_unlock_wait(&(lock)->raw_lock)
103
208/* 104/*
209 * If CONFIG_SMP is unset, declare the _raw_* definitions as nops 105 * Pull the _spin_*()/_read_*()/_write_*() functions/declarations:
210 */ 106 */
211#define spin_lock_init(lock) do { (void)(lock); } while(0) 107#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
212#define _raw_spin_lock(lock) do { (void)(lock); } while(0) 108# include <linux/spinlock_api_smp.h>
213#define spin_is_locked(lock) ((void)(lock), 0)
214#define assert_spin_locked(lock) do { (void)(lock); } while(0)
215#define _raw_spin_trylock(lock) (((void)(lock), 1))
216#define spin_unlock_wait(lock) (void)(lock)
217#define _raw_spin_unlock(lock) do { (void)(lock); } while(0)
218#endif /* CONFIG_DEBUG_SPINLOCK */
219
220/* RW spinlocks: No debug version */
221
222#if (__GNUC__ > 2)
223 typedef struct { } rwlock_t;
224 #define RW_LOCK_UNLOCKED (rwlock_t) { }
225#else 109#else
226 typedef struct { int gcc_is_buggy; } rwlock_t; 110# include <linux/spinlock_api_up.h>
227 #define RW_LOCK_UNLOCKED (rwlock_t) { 0 }
228#endif 111#endif
229 112
230#define rwlock_init(lock) do { (void)(lock); } while(0) 113#ifdef CONFIG_DEBUG_SPINLOCK
231#define _raw_read_lock(lock) do { (void)(lock); } while(0) 114 extern void _raw_spin_lock(spinlock_t *lock);
232#define _raw_read_unlock(lock) do { (void)(lock); } while(0) 115#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
233#define _raw_write_lock(lock) do { (void)(lock); } while(0) 116 extern int _raw_spin_trylock(spinlock_t *lock);
234#define _raw_write_unlock(lock) do { (void)(lock); } while(0) 117 extern void _raw_spin_unlock(spinlock_t *lock);
235#define read_can_lock(lock) (((void)(lock), 1)) 118
236#define write_can_lock(lock) (((void)(lock), 1)) 119 extern void _raw_read_lock(rwlock_t *lock);
237#define _raw_read_trylock(lock) ({ (void)(lock); (1); }) 120 extern int _raw_read_trylock(rwlock_t *lock);
238#define _raw_write_trylock(lock) ({ (void)(lock); (1); }) 121 extern void _raw_read_unlock(rwlock_t *lock);
239 122 extern void _raw_write_lock(rwlock_t *lock);
240#define _spin_trylock(lock) ({preempt_disable(); _raw_spin_trylock(lock) ? \ 123 extern int _raw_write_trylock(rwlock_t *lock);
241 1 : ({preempt_enable(); 0;});}) 124 extern void _raw_write_unlock(rwlock_t *lock);
242 125#else
243#define _read_trylock(lock) ({preempt_disable();_raw_read_trylock(lock) ? \ 126# define _raw_spin_unlock(lock) __raw_spin_unlock(&(lock)->raw_lock)
244 1 : ({preempt_enable(); 0;});}) 127# define _raw_spin_trylock(lock) __raw_spin_trylock(&(lock)->raw_lock)
245 128# define _raw_spin_lock(lock) __raw_spin_lock(&(lock)->raw_lock)
246#define _write_trylock(lock) ({preempt_disable(); _raw_write_trylock(lock) ? \ 129# define _raw_spin_lock_flags(lock, flags) \
247 1 : ({preempt_enable(); 0;});}) 130 __raw_spin_lock_flags(&(lock)->raw_lock, *(flags))
248 131# define _raw_read_lock(rwlock) __raw_read_lock(&(rwlock)->raw_lock)
249#define _spin_trylock_bh(lock) ({preempt_disable(); local_bh_disable(); \ 132# define _raw_write_lock(rwlock) __raw_write_lock(&(rwlock)->raw_lock)
250 _raw_spin_trylock(lock) ? \ 133# define _raw_read_unlock(rwlock) __raw_read_unlock(&(rwlock)->raw_lock)
251 1 : ({preempt_enable_no_resched(); local_bh_enable(); 0;});}) 134# define _raw_write_unlock(rwlock) __raw_write_unlock(&(rwlock)->raw_lock)
252 135# define _raw_read_trylock(rwlock) __raw_read_trylock(&(rwlock)->raw_lock)
253#define _spin_lock(lock) \ 136# define _raw_write_trylock(rwlock) __raw_write_trylock(&(rwlock)->raw_lock)
254do { \ 137#endif
255 preempt_disable(); \
256 _raw_spin_lock(lock); \
257 __acquire(lock); \
258} while(0)
259
260#define _write_lock(lock) \
261do { \
262 preempt_disable(); \
263 _raw_write_lock(lock); \
264 __acquire(lock); \
265} while(0)
266
267#define _read_lock(lock) \
268do { \
269 preempt_disable(); \
270 _raw_read_lock(lock); \
271 __acquire(lock); \
272} while(0)
273
274#define _spin_unlock(lock) \
275do { \
276 _raw_spin_unlock(lock); \
277 preempt_enable(); \
278 __release(lock); \
279} while (0)
280
281#define _write_unlock(lock) \
282do { \
283 _raw_write_unlock(lock); \
284 preempt_enable(); \
285 __release(lock); \
286} while(0)
287
288#define _read_unlock(lock) \
289do { \
290 _raw_read_unlock(lock); \
291 preempt_enable(); \
292 __release(lock); \
293} while(0)
294
295#define _spin_lock_irqsave(lock, flags) \
296do { \
297 local_irq_save(flags); \
298 preempt_disable(); \
299 _raw_spin_lock(lock); \
300 __acquire(lock); \
301} while (0)
302
303#define _spin_lock_irq(lock) \
304do { \
305 local_irq_disable(); \
306 preempt_disable(); \
307 _raw_spin_lock(lock); \
308 __acquire(lock); \
309} while (0)
310
311#define _spin_lock_bh(lock) \
312do { \
313 local_bh_disable(); \
314 preempt_disable(); \
315 _raw_spin_lock(lock); \
316 __acquire(lock); \
317} while (0)
318
319#define _read_lock_irqsave(lock, flags) \
320do { \
321 local_irq_save(flags); \
322 preempt_disable(); \
323 _raw_read_lock(lock); \
324 __acquire(lock); \
325} while (0)
326
327#define _read_lock_irq(lock) \
328do { \
329 local_irq_disable(); \
330 preempt_disable(); \
331 _raw_read_lock(lock); \
332 __acquire(lock); \
333} while (0)
334
335#define _read_lock_bh(lock) \
336do { \
337 local_bh_disable(); \
338 preempt_disable(); \
339 _raw_read_lock(lock); \
340 __acquire(lock); \
341} while (0)
342
343#define _write_lock_irqsave(lock, flags) \
344do { \
345 local_irq_save(flags); \
346 preempt_disable(); \
347 _raw_write_lock(lock); \
348 __acquire(lock); \
349} while (0)
350 138
351#define _write_lock_irq(lock) \ 139#define read_can_lock(rwlock) __raw_read_can_lock(&(rwlock)->raw_lock)
352do { \ 140#define write_can_lock(rwlock) __raw_write_can_lock(&(rwlock)->raw_lock)
353 local_irq_disable(); \
354 preempt_disable(); \
355 _raw_write_lock(lock); \
356 __acquire(lock); \
357} while (0)
358
359#define _write_lock_bh(lock) \
360do { \
361 local_bh_disable(); \
362 preempt_disable(); \
363 _raw_write_lock(lock); \
364 __acquire(lock); \
365} while (0)
366
367#define _spin_unlock_irqrestore(lock, flags) \
368do { \
369 _raw_spin_unlock(lock); \
370 local_irq_restore(flags); \
371 preempt_enable(); \
372 __release(lock); \
373} while (0)
374
375#define _spin_unlock_irq(lock) \
376do { \
377 _raw_spin_unlock(lock); \
378 local_irq_enable(); \
379 preempt_enable(); \
380 __release(lock); \
381} while (0)
382
383#define _spin_unlock_bh(lock) \
384do { \
385 _raw_spin_unlock(lock); \
386 preempt_enable_no_resched(); \
387 local_bh_enable(); \
388 __release(lock); \
389} while (0)
390
391#define _write_unlock_bh(lock) \
392do { \
393 _raw_write_unlock(lock); \
394 preempt_enable_no_resched(); \
395 local_bh_enable(); \
396 __release(lock); \
397} while (0)
398
399#define _read_unlock_irqrestore(lock, flags) \
400do { \
401 _raw_read_unlock(lock); \
402 local_irq_restore(flags); \
403 preempt_enable(); \
404 __release(lock); \
405} while (0)
406
407#define _write_unlock_irqrestore(lock, flags) \
408do { \
409 _raw_write_unlock(lock); \
410 local_irq_restore(flags); \
411 preempt_enable(); \
412 __release(lock); \
413} while (0)
414
415#define _read_unlock_irq(lock) \
416do { \
417 _raw_read_unlock(lock); \
418 local_irq_enable(); \
419 preempt_enable(); \
420 __release(lock); \
421} while (0)
422
423#define _read_unlock_bh(lock) \
424do { \
425 _raw_read_unlock(lock); \
426 preempt_enable_no_resched(); \
427 local_bh_enable(); \
428 __release(lock); \
429} while (0)
430
431#define _write_unlock_irq(lock) \
432do { \
433 _raw_write_unlock(lock); \
434 local_irq_enable(); \
435 preempt_enable(); \
436 __release(lock); \
437} while (0)
438
439#endif /* !SMP */
440 141
441/* 142/*
442 * Define the various spin_lock and rw_lock methods. Note we define these 143 * Define the various spin_lock and rw_lock methods. Note we define these
443 * regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The various 144 * regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The various
444 * methods are defined as nops in the case they are not required. 145 * methods are defined as nops in the case they are not required.
445 */ 146 */
446#define spin_trylock(lock) __cond_lock(_spin_trylock(lock)) 147#define spin_trylock(lock) __cond_lock(_spin_trylock(lock))
447#define read_trylock(lock) __cond_lock(_read_trylock(lock)) 148#define read_trylock(lock) __cond_lock(_read_trylock(lock))
448#define write_trylock(lock) __cond_lock(_write_trylock(lock)) 149#define write_trylock(lock) __cond_lock(_write_trylock(lock))
449 150
450#define spin_lock(lock) _spin_lock(lock) 151#define spin_lock(lock) _spin_lock(lock)
451#define write_lock(lock) _write_lock(lock) 152#define write_lock(lock) _write_lock(lock)
452#define read_lock(lock) _read_lock(lock) 153#define read_lock(lock) _read_lock(lock)
453 154
454#ifdef CONFIG_SMP 155#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
455#define spin_lock_irqsave(lock, flags) flags = _spin_lock_irqsave(lock) 156#define spin_lock_irqsave(lock, flags) flags = _spin_lock_irqsave(lock)
456#define read_lock_irqsave(lock, flags) flags = _read_lock_irqsave(lock) 157#define read_lock_irqsave(lock, flags) flags = _read_lock_irqsave(lock)
457#define write_lock_irqsave(lock, flags) flags = _write_lock_irqsave(lock) 158#define write_lock_irqsave(lock, flags) flags = _write_lock_irqsave(lock)
@@ -470,137 +171,59 @@ do { \
470#define write_lock_irq(lock) _write_lock_irq(lock) 171#define write_lock_irq(lock) _write_lock_irq(lock)
471#define write_lock_bh(lock) _write_lock_bh(lock) 172#define write_lock_bh(lock) _write_lock_bh(lock)
472 173
473#define spin_unlock(lock) _spin_unlock(lock) 174#define spin_unlock(lock) _spin_unlock(lock)
474#define write_unlock(lock) _write_unlock(lock) 175#define write_unlock(lock) _write_unlock(lock)
475#define read_unlock(lock) _read_unlock(lock) 176#define read_unlock(lock) _read_unlock(lock)
476 177
477#define spin_unlock_irqrestore(lock, flags) _spin_unlock_irqrestore(lock, flags) 178#define spin_unlock_irqrestore(lock, flags) \
179 _spin_unlock_irqrestore(lock, flags)
478#define spin_unlock_irq(lock) _spin_unlock_irq(lock) 180#define spin_unlock_irq(lock) _spin_unlock_irq(lock)
479#define spin_unlock_bh(lock) _spin_unlock_bh(lock) 181#define spin_unlock_bh(lock) _spin_unlock_bh(lock)
480 182
481#define read_unlock_irqrestore(lock, flags) _read_unlock_irqrestore(lock, flags) 183#define read_unlock_irqrestore(lock, flags) \
482#define read_unlock_irq(lock) _read_unlock_irq(lock) 184 _read_unlock_irqrestore(lock, flags)
483#define read_unlock_bh(lock) _read_unlock_bh(lock) 185#define read_unlock_irq(lock) _read_unlock_irq(lock)
186#define read_unlock_bh(lock) _read_unlock_bh(lock)
484 187
485#define write_unlock_irqrestore(lock, flags) _write_unlock_irqrestore(lock, flags) 188#define write_unlock_irqrestore(lock, flags) \
486#define write_unlock_irq(lock) _write_unlock_irq(lock) 189 _write_unlock_irqrestore(lock, flags)
487#define write_unlock_bh(lock) _write_unlock_bh(lock) 190#define write_unlock_irq(lock) _write_unlock_irq(lock)
191#define write_unlock_bh(lock) _write_unlock_bh(lock)
488 192
489#define spin_trylock_bh(lock) __cond_lock(_spin_trylock_bh(lock)) 193#define spin_trylock_bh(lock) __cond_lock(_spin_trylock_bh(lock))
490 194
491#define spin_trylock_irq(lock) \ 195#define spin_trylock_irq(lock) \
492({ \ 196({ \
493 local_irq_disable(); \ 197 local_irq_disable(); \
494 _spin_trylock(lock) ? \ 198 _spin_trylock(lock) ? \
495 1 : ({local_irq_enable(); 0; }); \ 199 1 : ({ local_irq_enable(); 0; }); \
496}) 200})
497 201
498#define spin_trylock_irqsave(lock, flags) \ 202#define spin_trylock_irqsave(lock, flags) \
499({ \ 203({ \
500 local_irq_save(flags); \ 204 local_irq_save(flags); \
501 _spin_trylock(lock) ? \ 205 _spin_trylock(lock) ? \
502 1 : ({local_irq_restore(flags); 0;}); \ 206 1 : ({ local_irq_restore(flags); 0; }); \
503}) 207})
504 208
505#ifdef CONFIG_LOCKMETER
506extern void _metered_spin_lock (spinlock_t *lock);
507extern void _metered_spin_unlock (spinlock_t *lock);
508extern int _metered_spin_trylock(spinlock_t *lock);
509extern void _metered_read_lock (rwlock_t *lock);
510extern void _metered_read_unlock (rwlock_t *lock);
511extern void _metered_write_lock (rwlock_t *lock);
512extern void _metered_write_unlock (rwlock_t *lock);
513extern int _metered_read_trylock (rwlock_t *lock);
514extern int _metered_write_trylock(rwlock_t *lock);
515#endif
516
517/* "lock on reference count zero" */
518#ifndef ATOMIC_DEC_AND_LOCK
519#include <asm/atomic.h>
520extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock);
521#endif
522
523#define atomic_dec_and_lock(atomic,lock) __cond_lock(_atomic_dec_and_lock(atomic,lock))
524
525/*
526 * bit-based spin_lock()
527 *
528 * Don't use this unless you really need to: spin_lock() and spin_unlock()
529 * are significantly faster.
530 */
531static inline void bit_spin_lock(int bitnum, unsigned long *addr)
532{
533 /*
534 * Assuming the lock is uncontended, this never enters
535 * the body of the outer loop. If it is contended, then
536 * within the inner loop a non-atomic test is used to
537 * busywait with less bus contention for a good time to
538 * attempt to acquire the lock bit.
539 */
540 preempt_disable();
541#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
542 while (test_and_set_bit(bitnum, addr)) {
543 while (test_bit(bitnum, addr)) {
544 preempt_enable();
545 cpu_relax();
546 preempt_disable();
547 }
548 }
549#endif
550 __acquire(bitlock);
551}
552
553/* 209/*
554 * Return true if it was acquired 210 * Pull the atomic_t declaration:
211 * (asm-mips/atomic.h needs above definitions)
555 */ 212 */
556static inline int bit_spin_trylock(int bitnum, unsigned long *addr) 213#include <asm/atomic.h>
557{ 214/**
558 preempt_disable(); 215 * atomic_dec_and_lock - lock on reaching reference count zero
559#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) 216 * @atomic: the atomic counter
560 if (test_and_set_bit(bitnum, addr)) { 217 * @lock: the spinlock in question
561 preempt_enable();
562 return 0;
563 }
564#endif
565 __acquire(bitlock);
566 return 1;
567}
568
569/*
570 * bit-based spin_unlock()
571 */
572static inline void bit_spin_unlock(int bitnum, unsigned long *addr)
573{
574#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
575 BUG_ON(!test_bit(bitnum, addr));
576 smp_mb__before_clear_bit();
577 clear_bit(bitnum, addr);
578#endif
579 preempt_enable();
580 __release(bitlock);
581}
582
583/*
584 * Return true if the lock is held.
585 */ 218 */
586static inline int bit_spin_is_locked(int bitnum, unsigned long *addr) 219extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock);
587{ 220#define atomic_dec_and_lock(atomic, lock) \
588#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) 221 __cond_lock(_atomic_dec_and_lock(atomic, lock))
589 return test_bit(bitnum, addr);
590#elif defined CONFIG_PREEMPT
591 return preempt_count();
592#else
593 return 1;
594#endif
595}
596
597#define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED
598#define DEFINE_RWLOCK(x) rwlock_t x = RW_LOCK_UNLOCKED
599 222
600/** 223/**
601 * spin_can_lock - would spin_trylock() succeed? 224 * spin_can_lock - would spin_trylock() succeed?
602 * @lock: the spinlock in question. 225 * @lock: the spinlock in question.
603 */ 226 */
604#define spin_can_lock(lock) (!spin_is_locked(lock)) 227#define spin_can_lock(lock) (!spin_is_locked(lock))
605 228
606#endif /* __LINUX_SPINLOCK_H */ 229#endif /* __LINUX_SPINLOCK_H */
diff --git a/include/linux/spinlock_api_smp.h b/include/linux/spinlock_api_smp.h
new file mode 100644
index 000000000000..78e6989ffb54
--- /dev/null
+++ b/include/linux/spinlock_api_smp.h
@@ -0,0 +1,57 @@
1#ifndef __LINUX_SPINLOCK_API_SMP_H
2#define __LINUX_SPINLOCK_API_SMP_H
3
4#ifndef __LINUX_SPINLOCK_H
5# error "please don't include this file directly"
6#endif
7
8/*
9 * include/linux/spinlock_api_smp.h
10 *
11 * spinlock API declarations on SMP (and debug)
12 * (implemented in kernel/spinlock.c)
13 *
14 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
15 * Released under the General Public License (GPL).
16 */
17
18int in_lock_functions(unsigned long addr);
19
20#define assert_spin_locked(x) BUG_ON(!spin_is_locked(x))
21
22void __lockfunc _spin_lock(spinlock_t *lock) __acquires(spinlock_t);
23void __lockfunc _read_lock(rwlock_t *lock) __acquires(rwlock_t);
24void __lockfunc _write_lock(rwlock_t *lock) __acquires(rwlock_t);
25void __lockfunc _spin_lock_bh(spinlock_t *lock) __acquires(spinlock_t);
26void __lockfunc _read_lock_bh(rwlock_t *lock) __acquires(rwlock_t);
27void __lockfunc _write_lock_bh(rwlock_t *lock) __acquires(rwlock_t);
28void __lockfunc _spin_lock_irq(spinlock_t *lock) __acquires(spinlock_t);
29void __lockfunc _read_lock_irq(rwlock_t *lock) __acquires(rwlock_t);
30void __lockfunc _write_lock_irq(rwlock_t *lock) __acquires(rwlock_t);
31unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
32 __acquires(spinlock_t);
33unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock)
34 __acquires(rwlock_t);
35unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock)
36 __acquires(rwlock_t);
37int __lockfunc _spin_trylock(spinlock_t *lock);
38int __lockfunc _read_trylock(rwlock_t *lock);
39int __lockfunc _write_trylock(rwlock_t *lock);
40int __lockfunc _spin_trylock_bh(spinlock_t *lock);
41void __lockfunc _spin_unlock(spinlock_t *lock) __releases(spinlock_t);
42void __lockfunc _read_unlock(rwlock_t *lock) __releases(rwlock_t);
43void __lockfunc _write_unlock(rwlock_t *lock) __releases(rwlock_t);
44void __lockfunc _spin_unlock_bh(spinlock_t *lock) __releases(spinlock_t);
45void __lockfunc _read_unlock_bh(rwlock_t *lock) __releases(rwlock_t);
46void __lockfunc _write_unlock_bh(rwlock_t *lock) __releases(rwlock_t);
47void __lockfunc _spin_unlock_irq(spinlock_t *lock) __releases(spinlock_t);
48void __lockfunc _read_unlock_irq(rwlock_t *lock) __releases(rwlock_t);
49void __lockfunc _write_unlock_irq(rwlock_t *lock) __releases(rwlock_t);
50void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags)
51 __releases(spinlock_t);
52void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
53 __releases(rwlock_t);
54void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
55 __releases(rwlock_t);
56
57#endif /* __LINUX_SPINLOCK_API_SMP_H */
diff --git a/include/linux/spinlock_api_up.h b/include/linux/spinlock_api_up.h
new file mode 100644
index 000000000000..cd81cee566f4
--- /dev/null
+++ b/include/linux/spinlock_api_up.h
@@ -0,0 +1,80 @@
1#ifndef __LINUX_SPINLOCK_API_UP_H
2#define __LINUX_SPINLOCK_API_UP_H
3
4#ifndef __LINUX_SPINLOCK_H
5# error "please don't include this file directly"
6#endif
7
8/*
9 * include/linux/spinlock_api_up.h
10 *
11 * spinlock API implementation on UP-nondebug (inlined implementation)
12 *
13 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
14 * Released under the General Public License (GPL).
15 */
16
17#define in_lock_functions(ADDR) 0
18
19#define assert_spin_locked(lock) do { (void)(lock); } while (0)
20
21/*
22 * In the UP-nondebug case there's no real locking going on, so the
23 * only thing we have to do is to keep the preempt counts and irq
24 * flags straight, to supress compiler warnings of unused lock
25 * variables, and to add the proper checker annotations:
26 */
27#define __LOCK(lock) \
28 do { preempt_disable(); __acquire(lock); (void)(lock); } while (0)
29
30#define __LOCK_BH(lock) \
31 do { local_bh_disable(); __LOCK(lock); } while (0)
32
33#define __LOCK_IRQ(lock) \
34 do { local_irq_disable(); __LOCK(lock); } while (0)
35
36#define __LOCK_IRQSAVE(lock, flags) \
37 do { local_irq_save(flags); __LOCK(lock); } while (0)
38
39#define __UNLOCK(lock) \
40 do { preempt_enable(); __release(lock); (void)(lock); } while (0)
41
42#define __UNLOCK_BH(lock) \
43 do { preempt_enable_no_resched(); local_bh_enable(); __release(lock); (void)(lock); } while (0)
44
45#define __UNLOCK_IRQ(lock) \
46 do { local_irq_enable(); __UNLOCK(lock); } while (0)
47
48#define __UNLOCK_IRQRESTORE(lock, flags) \
49 do { local_irq_restore(flags); __UNLOCK(lock); } while (0)
50
51#define _spin_lock(lock) __LOCK(lock)
52#define _read_lock(lock) __LOCK(lock)
53#define _write_lock(lock) __LOCK(lock)
54#define _spin_lock_bh(lock) __LOCK_BH(lock)
55#define _read_lock_bh(lock) __LOCK_BH(lock)
56#define _write_lock_bh(lock) __LOCK_BH(lock)
57#define _spin_lock_irq(lock) __LOCK_IRQ(lock)
58#define _read_lock_irq(lock) __LOCK_IRQ(lock)
59#define _write_lock_irq(lock) __LOCK_IRQ(lock)
60#define _spin_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
61#define _read_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
62#define _write_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
63#define _spin_trylock(lock) ({ __LOCK(lock); 1; })
64#define _read_trylock(lock) ({ __LOCK(lock); 1; })
65#define _write_trylock(lock) ({ __LOCK(lock); 1; })
66#define _spin_trylock_bh(lock) ({ __LOCK_BH(lock); 1; })
67#define _spin_unlock(lock) __UNLOCK(lock)
68#define _read_unlock(lock) __UNLOCK(lock)
69#define _write_unlock(lock) __UNLOCK(lock)
70#define _spin_unlock_bh(lock) __UNLOCK_BH(lock)
71#define _write_unlock_bh(lock) __UNLOCK_BH(lock)
72#define _read_unlock_bh(lock) __UNLOCK_BH(lock)
73#define _spin_unlock_irq(lock) __UNLOCK_IRQ(lock)
74#define _read_unlock_irq(lock) __UNLOCK_IRQ(lock)
75#define _write_unlock_irq(lock) __UNLOCK_IRQ(lock)
76#define _spin_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags)
77#define _read_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags)
78#define _write_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags)
79
80#endif /* __LINUX_SPINLOCK_API_UP_H */
diff --git a/include/linux/spinlock_types.h b/include/linux/spinlock_types.h
new file mode 100644
index 000000000000..9cb51e070390
--- /dev/null
+++ b/include/linux/spinlock_types.h
@@ -0,0 +1,67 @@
1#ifndef __LINUX_SPINLOCK_TYPES_H
2#define __LINUX_SPINLOCK_TYPES_H
3
4/*
5 * include/linux/spinlock_types.h - generic spinlock type definitions
6 * and initializers
7 *
8 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
9 * Released under the General Public License (GPL).
10 */
11
12#if defined(CONFIG_SMP)
13# include <asm/spinlock_types.h>
14#else
15# include <linux/spinlock_types_up.h>
16#endif
17
18typedef struct {
19 raw_spinlock_t raw_lock;
20#if defined(CONFIG_PREEMPT) && defined(CONFIG_SMP)
21 unsigned int break_lock;
22#endif
23#ifdef CONFIG_DEBUG_SPINLOCK
24 unsigned int magic, owner_cpu;
25 void *owner;
26#endif
27} spinlock_t;
28
29#define SPINLOCK_MAGIC 0xdead4ead
30
31typedef struct {
32 raw_rwlock_t raw_lock;
33#if defined(CONFIG_PREEMPT) && defined(CONFIG_SMP)
34 unsigned int break_lock;
35#endif
36#ifdef CONFIG_DEBUG_SPINLOCK
37 unsigned int magic, owner_cpu;
38 void *owner;
39#endif
40} rwlock_t;
41
42#define RWLOCK_MAGIC 0xdeaf1eed
43
44#define SPINLOCK_OWNER_INIT ((void *)-1L)
45
46#ifdef CONFIG_DEBUG_SPINLOCK
47# define SPIN_LOCK_UNLOCKED \
48 (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \
49 .magic = SPINLOCK_MAGIC, \
50 .owner = SPINLOCK_OWNER_INIT, \
51 .owner_cpu = -1 }
52#define RW_LOCK_UNLOCKED \
53 (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
54 .magic = RWLOCK_MAGIC, \
55 .owner = SPINLOCK_OWNER_INIT, \
56 .owner_cpu = -1 }
57#else
58# define SPIN_LOCK_UNLOCKED \
59 (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED }
60#define RW_LOCK_UNLOCKED \
61 (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED }
62#endif
63
64#define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED
65#define DEFINE_RWLOCK(x) rwlock_t x = RW_LOCK_UNLOCKED
66
67#endif /* __LINUX_SPINLOCK_TYPES_H */
diff --git a/include/linux/spinlock_types_up.h b/include/linux/spinlock_types_up.h
new file mode 100644
index 000000000000..def2d173a8db
--- /dev/null
+++ b/include/linux/spinlock_types_up.h
@@ -0,0 +1,51 @@
1#ifndef __LINUX_SPINLOCK_TYPES_UP_H
2#define __LINUX_SPINLOCK_TYPES_UP_H
3
4#ifndef __LINUX_SPINLOCK_TYPES_H
5# error "please don't include this file directly"
6#endif
7
8/*
9 * include/linux/spinlock_types_up.h - spinlock type definitions for UP
10 *
11 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
12 * Released under the General Public License (GPL).
13 */
14
15#ifdef CONFIG_DEBUG_SPINLOCK
16
17typedef struct {
18 volatile unsigned int slock;
19} raw_spinlock_t;
20
21#define __RAW_SPIN_LOCK_UNLOCKED { 1 }
22
23#else
24
25/*
26 * All gcc 2.95 versions and early versions of 2.96 have a nasty bug
27 * with empty initializers.
28 */
29#if (__GNUC__ > 2)
30typedef struct { } raw_spinlock_t;
31
32#define __RAW_SPIN_LOCK_UNLOCKED { }
33#else
34typedef struct { int gcc_is_buggy; } raw_spinlock_t;
35#define __RAW_SPIN_LOCK_UNLOCKED (raw_spinlock_t) { 0 }
36#endif
37
38#endif
39
40#if (__GNUC__ > 2)
41typedef struct {
42 /* no debug version on UP */
43} raw_rwlock_t;
44
45#define __RAW_RW_LOCK_UNLOCKED { }
46#else
47typedef struct { int gcc_is_buggy; } raw_rwlock_t;
48#define __RAW_RW_LOCK_UNLOCKED (raw_rwlock_t) { 0 }
49#endif
50
51#endif /* __LINUX_SPINLOCK_TYPES_UP_H */
diff --git a/include/linux/spinlock_up.h b/include/linux/spinlock_up.h
new file mode 100644
index 000000000000..31accf2f0b13
--- /dev/null
+++ b/include/linux/spinlock_up.h
@@ -0,0 +1,74 @@
1#ifndef __LINUX_SPINLOCK_UP_H
2#define __LINUX_SPINLOCK_UP_H
3
4#ifndef __LINUX_SPINLOCK_H
5# error "please don't include this file directly"
6#endif
7
8/*
9 * include/linux/spinlock_up.h - UP-debug version of spinlocks.
10 *
11 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
12 * Released under the General Public License (GPL).
13 *
14 * In the debug case, 1 means unlocked, 0 means locked. (the values
15 * are inverted, to catch initialization bugs)
16 *
17 * No atomicity anywhere, we are on UP.
18 */
19
20#ifdef CONFIG_DEBUG_SPINLOCK
21
22#define __raw_spin_is_locked(x) ((x)->slock == 0)
23
24static inline void __raw_spin_lock(raw_spinlock_t *lock)
25{
26 lock->slock = 0;
27}
28
29static inline void
30__raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long flags)
31{
32 local_irq_save(flags);
33 lock->slock = 0;
34}
35
36static inline int __raw_spin_trylock(raw_spinlock_t *lock)
37{
38 char oldval = lock->slock;
39
40 lock->slock = 0;
41
42 return oldval > 0;
43}
44
45static inline void __raw_spin_unlock(raw_spinlock_t *lock)
46{
47 lock->slock = 1;
48}
49
50/*
51 * Read-write spinlocks. No debug version.
52 */
53#define __raw_read_lock(lock) do { (void)(lock); } while (0)
54#define __raw_write_lock(lock) do { (void)(lock); } while (0)
55#define __raw_read_trylock(lock) ({ (void)(lock); 1; })
56#define __raw_write_trylock(lock) ({ (void)(lock); 1; })
57#define __raw_read_unlock(lock) do { (void)(lock); } while (0)
58#define __raw_write_unlock(lock) do { (void)(lock); } while (0)
59
60#else /* DEBUG_SPINLOCK */
61#define __raw_spin_is_locked(lock) ((void)(lock), 0)
62/* for sched.c and kernel_lock.c: */
63# define __raw_spin_lock(lock) do { (void)(lock); } while (0)
64# define __raw_spin_unlock(lock) do { (void)(lock); } while (0)
65# define __raw_spin_trylock(lock) ({ (void)(lock); 1; })
66#endif /* DEBUG_SPINLOCK */
67
68#define __raw_read_can_lock(lock) (((void)(lock), 1))
69#define __raw_write_can_lock(lock) (((void)(lock), 1))
70
71#define __raw_spin_unlock_wait(lock) \
72 do { cpu_relax(); } while (__raw_spin_is_locked(lock))
73
74#endif /* __LINUX_SPINLOCK_UP_H */
diff --git a/kernel/Makefile b/kernel/Makefile
index 8d57a2f1226b..ff4dc02ce170 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -12,6 +12,7 @@ obj-y = sched.o fork.o exec_domain.o panic.o printk.o profile.o \
12obj-$(CONFIG_FUTEX) += futex.o 12obj-$(CONFIG_FUTEX) += futex.o
13obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o 13obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
14obj-$(CONFIG_SMP) += cpu.o spinlock.o 14obj-$(CONFIG_SMP) += cpu.o spinlock.o
15obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o
15obj-$(CONFIG_UID16) += uid16.o 16obj-$(CONFIG_UID16) += uid16.o
16obj-$(CONFIG_MODULES) += module.o 17obj-$(CONFIG_MODULES) += module.o
17obj-$(CONFIG_KALLSYMS) += kallsyms.o 18obj-$(CONFIG_KALLSYMS) += kallsyms.o
diff --git a/kernel/sched.c b/kernel/sched.c
index 2632b812cf24..15db82116e19 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1511,6 +1511,10 @@ static inline void finish_task_switch(runqueue_t *rq, task_t *prev)
1511 * Manfred Spraul <manfred@colorfullife.com> 1511 * Manfred Spraul <manfred@colorfullife.com>
1512 */ 1512 */
1513 prev_task_flags = prev->flags; 1513 prev_task_flags = prev->flags;
1514#ifdef CONFIG_DEBUG_SPINLOCK
1515 /* this is a valid case when another task releases the spinlock */
1516 rq->lock.owner = current;
1517#endif
1514 finish_arch_switch(prev); 1518 finish_arch_switch(prev);
1515 finish_lock_switch(rq, prev); 1519 finish_lock_switch(rq, prev);
1516 if (mm) 1520 if (mm)
diff --git a/kernel/spinlock.c b/kernel/spinlock.c
index 0c3f9d8bbe17..0375fcd5921d 100644
--- a/kernel/spinlock.c
+++ b/kernel/spinlock.c
@@ -3,7 +3,10 @@
3 * 3 *
4 * Author: Zwane Mwaikambo <zwane@fsmlabs.com> 4 * Author: Zwane Mwaikambo <zwane@fsmlabs.com>
5 * 5 *
6 * Copyright (2004) Ingo Molnar 6 * Copyright (2004, 2005) Ingo Molnar
7 *
8 * This file contains the spinlock/rwlock implementations for the
9 * SMP and the DEBUG_SPINLOCK cases. (UP-nondebug inlines them)
7 */ 10 */
8 11
9#include <linux/config.h> 12#include <linux/config.h>
@@ -17,12 +20,12 @@
17 * Generic declaration of the raw read_trylock() function, 20 * Generic declaration of the raw read_trylock() function,
18 * architectures are supposed to optimize this: 21 * architectures are supposed to optimize this:
19 */ 22 */
20int __lockfunc generic_raw_read_trylock(rwlock_t *lock) 23int __lockfunc generic__raw_read_trylock(raw_rwlock_t *lock)
21{ 24{
22 _raw_read_lock(lock); 25 __raw_read_lock(lock);
23 return 1; 26 return 1;
24} 27}
25EXPORT_SYMBOL(generic_raw_read_trylock); 28EXPORT_SYMBOL(generic__raw_read_trylock);
26 29
27int __lockfunc _spin_trylock(spinlock_t *lock) 30int __lockfunc _spin_trylock(spinlock_t *lock)
28{ 31{
@@ -57,7 +60,7 @@ int __lockfunc _write_trylock(rwlock_t *lock)
57} 60}
58EXPORT_SYMBOL(_write_trylock); 61EXPORT_SYMBOL(_write_trylock);
59 62
60#ifndef CONFIG_PREEMPT 63#if !defined(CONFIG_PREEMPT) || !defined(CONFIG_SMP)
61 64
62void __lockfunc _read_lock(rwlock_t *lock) 65void __lockfunc _read_lock(rwlock_t *lock)
63{ 66{
@@ -72,7 +75,7 @@ unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
72 75
73 local_irq_save(flags); 76 local_irq_save(flags);
74 preempt_disable(); 77 preempt_disable();
75 _raw_spin_lock_flags(lock, flags); 78 _raw_spin_lock_flags(lock, &flags);
76 return flags; 79 return flags;
77} 80}
78EXPORT_SYMBOL(_spin_lock_irqsave); 81EXPORT_SYMBOL(_spin_lock_irqsave);
diff --git a/lib/Makefile b/lib/Makefile
index d9c38ba05e7b..44a46750690a 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -16,6 +16,7 @@ CFLAGS_kobject.o += -DDEBUG
16CFLAGS_kobject_uevent.o += -DDEBUG 16CFLAGS_kobject_uevent.o += -DDEBUG
17endif 17endif
18 18
19obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o
19lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o 20lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
20lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o 21lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
21lib-$(CONFIG_SEMAPHORE_SLEEPERS) += semaphore-sleepers.o 22lib-$(CONFIG_SEMAPHORE_SLEEPERS) += semaphore-sleepers.o
diff --git a/lib/dec_and_lock.c b/lib/dec_and_lock.c
index 6658d81e1836..2377af057d09 100644
--- a/lib/dec_and_lock.c
+++ b/lib/dec_and_lock.c
@@ -25,8 +25,6 @@
25 * this is trivially done efficiently using a load-locked 25 * this is trivially done efficiently using a load-locked
26 * store-conditional approach, for example. 26 * store-conditional approach, for example.
27 */ 27 */
28
29#ifndef ATOMIC_DEC_AND_LOCK
30int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock) 28int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock)
31{ 29{
32 spin_lock(lock); 30 spin_lock(lock);
@@ -37,4 +35,3 @@ int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock)
37} 35}
38 36
39EXPORT_SYMBOL(_atomic_dec_and_lock); 37EXPORT_SYMBOL(_atomic_dec_and_lock);
40#endif
diff --git a/lib/kernel_lock.c b/lib/kernel_lock.c
index bd2bc5d887b8..cb5490ec00f2 100644
--- a/lib/kernel_lock.c
+++ b/lib/kernel_lock.c
@@ -177,8 +177,7 @@ static inline void __lock_kernel(void)
177 177
178static inline void __unlock_kernel(void) 178static inline void __unlock_kernel(void)
179{ 179{
180 _raw_spin_unlock(&kernel_flag); 180 spin_unlock(&kernel_flag);
181 preempt_enable();
182} 181}
183 182
184/* 183/*
diff --git a/lib/spinlock_debug.c b/lib/spinlock_debug.c
new file mode 100644
index 000000000000..906ad101eab3
--- /dev/null
+++ b/lib/spinlock_debug.c
@@ -0,0 +1,257 @@
1/*
2 * Copyright 2005, Red Hat, Inc., Ingo Molnar
3 * Released under the General Public License (GPL).
4 *
5 * This file contains the spinlock/rwlock implementations for
6 * DEBUG_SPINLOCK.
7 */
8
9#include <linux/config.h>
10#include <linux/spinlock.h>
11#include <linux/interrupt.h>
12#include <linux/delay.h>
13
14static void spin_bug(spinlock_t *lock, const char *msg)
15{
16 static long print_once = 1;
17 struct task_struct *owner = NULL;
18
19 if (xchg(&print_once, 0)) {
20 if (lock->owner && lock->owner != SPINLOCK_OWNER_INIT)
21 owner = lock->owner;
22 printk("BUG: spinlock %s on CPU#%d, %s/%d\n",
23 msg, smp_processor_id(), current->comm, current->pid);
24 printk(" lock: %p, .magic: %08x, .owner: %s/%d, .owner_cpu: %d\n",
25 lock, lock->magic,
26 owner ? owner->comm : "<none>",
27 owner ? owner->pid : -1,
28 lock->owner_cpu);
29 dump_stack();
30#ifdef CONFIG_SMP
31 /*
32 * We cannot continue on SMP:
33 */
34// panic("bad locking");
35#endif
36 }
37}
38
39#define SPIN_BUG_ON(cond, lock, msg) if (unlikely(cond)) spin_bug(lock, msg)
40
41static inline void debug_spin_lock_before(spinlock_t *lock)
42{
43 SPIN_BUG_ON(lock->magic != SPINLOCK_MAGIC, lock, "bad magic");
44 SPIN_BUG_ON(lock->owner == current, lock, "recursion");
45 SPIN_BUG_ON(lock->owner_cpu == raw_smp_processor_id(),
46 lock, "cpu recursion");
47}
48
49static inline void debug_spin_lock_after(spinlock_t *lock)
50{
51 lock->owner_cpu = raw_smp_processor_id();
52 lock->owner = current;
53}
54
55static inline void debug_spin_unlock(spinlock_t *lock)
56{
57 SPIN_BUG_ON(lock->magic != SPINLOCK_MAGIC, lock, "bad magic");
58 SPIN_BUG_ON(!spin_is_locked(lock), lock, "already unlocked");
59 SPIN_BUG_ON(lock->owner != current, lock, "wrong owner");
60 SPIN_BUG_ON(lock->owner_cpu != raw_smp_processor_id(),
61 lock, "wrong CPU");
62 lock->owner = SPINLOCK_OWNER_INIT;
63 lock->owner_cpu = -1;
64}
65
66static void __spin_lock_debug(spinlock_t *lock)
67{
68 int print_once = 1;
69 u64 i;
70
71 for (;;) {
72 for (i = 0; i < loops_per_jiffy * HZ; i++) {
73 cpu_relax();
74 if (__raw_spin_trylock(&lock->raw_lock))
75 return;
76 }
77 /* lockup suspected: */
78 if (print_once) {
79 print_once = 0;
80 printk("BUG: spinlock lockup on CPU#%d, %s/%d, %p\n",
81 smp_processor_id(), current->comm, current->pid,
82 lock);
83 dump_stack();
84 }
85 }
86}
87
88void _raw_spin_lock(spinlock_t *lock)
89{
90 debug_spin_lock_before(lock);
91 if (unlikely(!__raw_spin_trylock(&lock->raw_lock)))
92 __spin_lock_debug(lock);
93 debug_spin_lock_after(lock);
94}
95
96int _raw_spin_trylock(spinlock_t *lock)
97{
98 int ret = __raw_spin_trylock(&lock->raw_lock);
99
100 if (ret)
101 debug_spin_lock_after(lock);
102#ifndef CONFIG_SMP
103 /*
104 * Must not happen on UP:
105 */
106 SPIN_BUG_ON(!ret, lock, "trylock failure on UP");
107#endif
108 return ret;
109}
110
111void _raw_spin_unlock(spinlock_t *lock)
112{
113 debug_spin_unlock(lock);
114 __raw_spin_unlock(&lock->raw_lock);
115}
116
117static void rwlock_bug(rwlock_t *lock, const char *msg)
118{
119 static long print_once = 1;
120
121 if (xchg(&print_once, 0)) {
122 printk("BUG: rwlock %s on CPU#%d, %s/%d, %p\n", msg,
123 smp_processor_id(), current->comm, current->pid, lock);
124 dump_stack();
125#ifdef CONFIG_SMP
126 /*
127 * We cannot continue on SMP:
128 */
129 panic("bad locking");
130#endif
131 }
132}
133
134#define RWLOCK_BUG_ON(cond, lock, msg) if (unlikely(cond)) rwlock_bug(lock, msg)
135
136static void __read_lock_debug(rwlock_t *lock)
137{
138 int print_once = 1;
139 u64 i;
140
141 for (;;) {
142 for (i = 0; i < loops_per_jiffy * HZ; i++) {
143 cpu_relax();
144 if (__raw_read_trylock(&lock->raw_lock))
145 return;
146 }
147 /* lockup suspected: */
148 if (print_once) {
149 print_once = 0;
150 printk("BUG: read-lock lockup on CPU#%d, %s/%d, %p\n",
151 smp_processor_id(), current->comm, current->pid,
152 lock);
153 dump_stack();
154 }
155 }
156}
157
158void _raw_read_lock(rwlock_t *lock)
159{
160 RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");
161 if (unlikely(!__raw_read_trylock(&lock->raw_lock)))
162 __read_lock_debug(lock);
163}
164
165int _raw_read_trylock(rwlock_t *lock)
166{
167 int ret = __raw_read_trylock(&lock->raw_lock);
168
169#ifndef CONFIG_SMP
170 /*
171 * Must not happen on UP:
172 */
173 RWLOCK_BUG_ON(!ret, lock, "trylock failure on UP");
174#endif
175 return ret;
176}
177
178void _raw_read_unlock(rwlock_t *lock)
179{
180 RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");
181 __raw_read_unlock(&lock->raw_lock);
182}
183
184static inline void debug_write_lock_before(rwlock_t *lock)
185{
186 RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");
187 RWLOCK_BUG_ON(lock->owner == current, lock, "recursion");
188 RWLOCK_BUG_ON(lock->owner_cpu == raw_smp_processor_id(),
189 lock, "cpu recursion");
190}
191
192static inline void debug_write_lock_after(rwlock_t *lock)
193{
194 lock->owner_cpu = raw_smp_processor_id();
195 lock->owner = current;
196}
197
198static inline void debug_write_unlock(rwlock_t *lock)
199{
200 RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic");
201 RWLOCK_BUG_ON(lock->owner != current, lock, "wrong owner");
202 RWLOCK_BUG_ON(lock->owner_cpu != raw_smp_processor_id(),
203 lock, "wrong CPU");
204 lock->owner = SPINLOCK_OWNER_INIT;
205 lock->owner_cpu = -1;
206}
207
208static void __write_lock_debug(rwlock_t *lock)
209{
210 int print_once = 1;
211 u64 i;
212
213 for (;;) {
214 for (i = 0; i < loops_per_jiffy * HZ; i++) {
215 cpu_relax();
216 if (__raw_write_trylock(&lock->raw_lock))
217 return;
218 }
219 /* lockup suspected: */
220 if (print_once) {
221 print_once = 0;
222 printk("BUG: write-lock lockup on CPU#%d, %s/%d, %p\n",
223 smp_processor_id(), current->comm, current->pid,
224 lock);
225 dump_stack();
226 }
227 }
228}
229
230void _raw_write_lock(rwlock_t *lock)
231{
232 debug_write_lock_before(lock);
233 if (unlikely(!__raw_write_trylock(&lock->raw_lock)))
234 __write_lock_debug(lock);
235 debug_write_lock_after(lock);
236}
237
238int _raw_write_trylock(rwlock_t *lock)
239{
240 int ret = __raw_write_trylock(&lock->raw_lock);
241
242 if (ret)
243 debug_write_lock_after(lock);
244#ifndef CONFIG_SMP
245 /*
246 * Must not happen on UP:
247 */
248 RWLOCK_BUG_ON(!ret, lock, "trylock failure on UP");
249#endif
250 return ret;
251}
252
253void _raw_write_unlock(rwlock_t *lock)
254{
255 debug_write_unlock(lock);
256 __raw_write_unlock(&lock->raw_lock);
257}
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