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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-26 15:48:06 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-26 15:48:06 -0500
commitb0138a6cb7923a997d278b47c176778534d1095b (patch)
tree4fcb8822a69631baba568e4e1942847747123887 /include/asm-parisc/bitops.h
parent6572d6d7d0f965dda19d02af804ed3ae4b3bf1fc (diff)
parent1055a8af093fea7490445bd15cd671020e542035 (diff)
Merge master.kernel.org:/pub/scm/linux/kernel/git/kyle/parisc-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/kyle/parisc-2.6: (78 commits) [PARISC] Use symbolic last syscall in __NR_Linux_syscalls [PARISC] Add missing statfs64 and fstatfs64 syscalls Revert "[PARISC] Optimize TLB flush on SMP systems" [PARISC] Compat signal fixes for 64-bit parisc [PARISC] Reorder syscalls to match unistd.h Revert "[PATCH] make kernel/signal.c:kill_proc_info() static" [PARISC] fix sys_rt_sigqueueinfo [PARISC] fix section mismatch warnings in harmony sound driver [PARISC] do not export get_register/set_register [PARISC] add ENTRY()/ENDPROC() and simplify assembly of HP/UX emulation code [PARISC] convert to use CONFIG_64BIT instead of __LP64__ [PARISC] use CONFIG_64BIT instead of __LP64__ [PARISC] add ASM_EXCEPTIONTABLE_ENTRY() macro [PARISC] more ENTRY(), ENDPROC(), END() conversions [PARISC] fix ENTRY() and ENDPROC() for 64bit-parisc [PARISC] Fixes /proc/cpuinfo cache output on B160L [PARISC] implement standard ENTRY(), END() and ENDPROC() [PARISC] kill ENTRY_SYS_CPUS [PARISC] clean up debugging printks in smp.c [PARISC] factor syscall_restart code out of do_signal ... Fix conflict in include/linux/sched.h due to kill_proc_info() being made publicly available to PARISC again.
Diffstat (limited to 'include/asm-parisc/bitops.h')
-rw-r--r--include/asm-parisc/bitops.h24
1 files changed, 15 insertions, 9 deletions
diff --git a/include/asm-parisc/bitops.h b/include/asm-parisc/bitops.h
index 900561922c4c..015cb0d379bd 100644
--- a/include/asm-parisc/bitops.h
+++ b/include/asm-parisc/bitops.h
@@ -60,31 +60,37 @@ static __inline__ void change_bit(int nr, volatile unsigned long * addr)
60static __inline__ int test_and_set_bit(int nr, volatile unsigned long * addr) 60static __inline__ int test_and_set_bit(int nr, volatile unsigned long * addr)
61{ 61{
62 unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr); 62 unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
63 unsigned long oldbit; 63 unsigned long old;
64 unsigned long flags; 64 unsigned long flags;
65 int set;
65 66
66 addr += (nr >> SHIFT_PER_LONG); 67 addr += (nr >> SHIFT_PER_LONG);
67 _atomic_spin_lock_irqsave(addr, flags); 68 _atomic_spin_lock_irqsave(addr, flags);
68 oldbit = *addr; 69 old = *addr;
69 *addr = oldbit | mask; 70 set = (old & mask) ? 1 : 0;
71 if (!set)
72 *addr = old | mask;
70 _atomic_spin_unlock_irqrestore(addr, flags); 73 _atomic_spin_unlock_irqrestore(addr, flags);
71 74
72 return (oldbit & mask) ? 1 : 0; 75 return set;
73} 76}
74 77
75static __inline__ int test_and_clear_bit(int nr, volatile unsigned long * addr) 78static __inline__ int test_and_clear_bit(int nr, volatile unsigned long * addr)
76{ 79{
77 unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr); 80 unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
78 unsigned long oldbit; 81 unsigned long old;
79 unsigned long flags; 82 unsigned long flags;
83 int set;
80 84
81 addr += (nr >> SHIFT_PER_LONG); 85 addr += (nr >> SHIFT_PER_LONG);
82 _atomic_spin_lock_irqsave(addr, flags); 86 _atomic_spin_lock_irqsave(addr, flags);
83 oldbit = *addr; 87 old = *addr;
84 *addr = oldbit & ~mask; 88 set = (old & mask) ? 1 : 0;
89 if (set)
90 *addr = old & ~mask;
85 _atomic_spin_unlock_irqrestore(addr, flags); 91 _atomic_spin_unlock_irqrestore(addr, flags);
86 92
87 return (oldbit & mask) ? 1 : 0; 93 return set;
88} 94}
89 95
90static __inline__ int test_and_change_bit(int nr, volatile unsigned long * addr) 96static __inline__ int test_and_change_bit(int nr, volatile unsigned long * addr)
@@ -130,7 +136,7 @@ static __inline__ unsigned long __ffs(unsigned long x)
130 unsigned long ret; 136 unsigned long ret;
131 137
132 __asm__( 138 __asm__(
133#ifdef __LP64__ 139#ifdef CONFIG_64BIT
134 " ldi 63,%1\n" 140 " ldi 63,%1\n"
135 " extrd,u,*<> %0,63,32,%%r0\n" 141 " extrd,u,*<> %0,63,32,%%r0\n"
136 " extrd,u,*TR %0,31,32,%0\n" /* move top 32-bits down */ 142 " extrd,u,*TR %0,31,32,%0\n" /* move top 32-bits down */