aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2009-01-26 12:47:28 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-26 12:47:28 -0500
commit810ee58de26c9c1255d716b1db7344c4a1093fec (patch)
tree176531e4e4989ec7a8996a356b1a79ae7b647568
parent2927fceafc91afe744e0d1d33f8bbf98c42668fc (diff)
parente88a0faae5baaaa3bdc6f23a55ad6bc7a7b4aa77 (diff)
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (29 commits) xen: unitialised return value in xenbus_write_transaction x86: fix section mismatch warning x86: unmask CPUID levels on Intel CPUs, fix x86: work around PAGE_KERNEL_WC not getting WC in iomap_atomic_prot_pfn. x86: use standard PIT frequency xen: handle highmem pages correctly when shrinking a domain x86, mm: fix pte_free() xen: actually release memory when shrinking domain x86: unmask CPUID levels on Intel CPUs x86: add MSR_IA32_MISC_ENABLE bits to <asm/msr-index.h> x86: fix PTE corruption issue while mapping RAM using /dev/mem x86: mtrr fix debug boot parameter x86: fix page attribute corruption with cpa() Revert "x86: signal: change type of paramter for sys_rt_sigreturn()" x86: use early clobbers in usercopy*.c x86: remove kernel_physical_mapping_init() from init section fix: crash: IP: __bitmap_intersects+0x48/0x73 cpufreq: use work_on_cpu in acpi-cpufreq.c for drv_read and drv_write work_on_cpu: Use our own workqueue. work_on_cpu: don't try to get_online_cpus() in work_on_cpu. ...
-rw-r--r--arch/x86/include/asm/bitops.h14
-rw-r--r--arch/x86/include/asm/io.h1
-rw-r--r--arch/x86/include/asm/msr-index.h29
-rw-r--r--arch/x86/include/asm/pgalloc.h1
-rw-r--r--arch/x86/include/asm/syscalls.h2
-rw-r--r--arch/x86/include/asm/timex.h13
-rw-r--r--arch/x86/kernel/apic.c9
-rw-r--r--arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c35
-rw-r--r--arch/x86/kernel/cpu/intel.c13
-rw-r--r--arch/x86/kernel/cpu/mtrr/generic.c12
-rw-r--r--arch/x86/kernel/setup_percpu.c2
-rw-r--r--arch/x86/kernel/signal.c11
-rw-r--r--arch/x86/kernel/tlb_uv.c1
-rw-r--r--arch/x86/kernel/vmi_32.c2
-rw-r--r--arch/x86/lib/usercopy_32.c4
-rw-r--r--arch/x86/lib/usercopy_64.c4
-rw-r--r--arch/x86/mm/init_32.c48
-rw-r--r--arch/x86/mm/init_64.c2
-rw-r--r--arch/x86/mm/iomap_32.c10
-rw-r--r--arch/x86/mm/ioremap.c25
-rw-r--r--arch/x86/mm/pageattr.c49
-rw-r--r--arch/x86/mm/pat.c43
-rw-r--r--drivers/xen/balloon.c8
-rw-r--r--drivers/xen/xenfs/xenbus.c11
-rw-r--r--include/asm-generic/bitops/__ffs.h2
-rw-r--r--include/asm-generic/bitops/__fls.h2
-rw-r--r--include/asm-generic/bitops/fls.h2
-rw-r--r--include/asm-generic/bitops/fls64.h4
-rw-r--r--kernel/workqueue.c20
-rw-r--r--lib/Kconfig.debug9
30 files changed, 260 insertions, 128 deletions
diff --git a/arch/x86/include/asm/bitops.h b/arch/x86/include/asm/bitops.h
index e02a359d2aa5..02b47a603fc8 100644
--- a/arch/x86/include/asm/bitops.h
+++ b/arch/x86/include/asm/bitops.h
@@ -3,6 +3,9 @@
3 3
4/* 4/*
5 * Copyright 1992, Linus Torvalds. 5 * Copyright 1992, Linus Torvalds.
6 *
7 * Note: inlines with more than a single statement should be marked
8 * __always_inline to avoid problems with older gcc's inlining heuristics.
6 */ 9 */
7 10
8#ifndef _LINUX_BITOPS_H 11#ifndef _LINUX_BITOPS_H
@@ -53,7 +56,8 @@
53 * Note that @nr may be almost arbitrarily large; this function is not 56 * Note that @nr may be almost arbitrarily large; this function is not
54 * restricted to acting on a single-word quantity. 57 * restricted to acting on a single-word quantity.
55 */ 58 */
56static inline void set_bit(unsigned int nr, volatile unsigned long *addr) 59static __always_inline void
60set_bit(unsigned int nr, volatile unsigned long *addr)
57{ 61{
58 if (IS_IMMEDIATE(nr)) { 62 if (IS_IMMEDIATE(nr)) {
59 asm volatile(LOCK_PREFIX "orb %1,%0" 63 asm volatile(LOCK_PREFIX "orb %1,%0"
@@ -90,7 +94,8 @@ static inline void __set_bit(int nr, volatile unsigned long *addr)
90 * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit() 94 * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
91 * in order to ensure changes are visible on other processors. 95 * in order to ensure changes are visible on other processors.
92 */ 96 */
93static inline void clear_bit(int nr, volatile unsigned long *addr) 97static __always_inline void
98clear_bit(int nr, volatile unsigned long *addr)
94{ 99{
95 if (IS_IMMEDIATE(nr)) { 100 if (IS_IMMEDIATE(nr)) {
96 asm volatile(LOCK_PREFIX "andb %1,%0" 101 asm volatile(LOCK_PREFIX "andb %1,%0"
@@ -204,7 +209,8 @@ static inline int test_and_set_bit(int nr, volatile unsigned long *addr)
204 * 209 *
205 * This is the same as test_and_set_bit on x86. 210 * This is the same as test_and_set_bit on x86.
206 */ 211 */
207static inline int test_and_set_bit_lock(int nr, volatile unsigned long *addr) 212static __always_inline int
213test_and_set_bit_lock(int nr, volatile unsigned long *addr)
208{ 214{
209 return test_and_set_bit(nr, addr); 215 return test_and_set_bit(nr, addr);
210} 216}
@@ -300,7 +306,7 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
300 return oldbit; 306 return oldbit;
301} 307}
302 308
303static inline int constant_test_bit(unsigned int nr, const volatile unsigned long *addr) 309static __always_inline int constant_test_bit(unsigned int nr, const volatile unsigned long *addr)
304{ 310{
305 return ((1UL << (nr % BITS_PER_LONG)) & 311 return ((1UL << (nr % BITS_PER_LONG)) &
306 (((unsigned long *)addr)[nr / BITS_PER_LONG])) != 0; 312 (((unsigned long *)addr)[nr / BITS_PER_LONG])) != 0;
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 05cfed4485fa..1dbbdf4be9b4 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -99,7 +99,6 @@ extern void __iomem *ioremap_wc(unsigned long offset, unsigned long size);
99 * A boot-time mapping is currently limited to at most 16 pages. 99 * A boot-time mapping is currently limited to at most 16 pages.
100 */ 100 */
101extern void early_ioremap_init(void); 101extern void early_ioremap_init(void);
102extern void early_ioremap_clear(void);
103extern void early_ioremap_reset(void); 102extern void early_ioremap_reset(void);
104extern void __iomem *early_ioremap(unsigned long offset, unsigned long size); 103extern void __iomem *early_ioremap(unsigned long offset, unsigned long size);
105extern void __iomem *early_memremap(unsigned long offset, unsigned long size); 104extern void __iomem *early_memremap(unsigned long offset, unsigned long size);
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index cb58643947b9..358acc59ae04 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -202,6 +202,35 @@
202#define MSR_IA32_THERM_STATUS 0x0000019c 202#define MSR_IA32_THERM_STATUS 0x0000019c
203#define MSR_IA32_MISC_ENABLE 0x000001a0 203#define MSR_IA32_MISC_ENABLE 0x000001a0
204 204
205/* MISC_ENABLE bits: architectural */
206#define MSR_IA32_MISC_ENABLE_FAST_STRING (1ULL << 0)
207#define MSR_IA32_MISC_ENABLE_TCC (1ULL << 1)
208#define MSR_IA32_MISC_ENABLE_EMON (1ULL << 7)
209#define MSR_IA32_MISC_ENABLE_BTS_UNAVAIL (1ULL << 11)
210#define MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL (1ULL << 12)
211#define MSR_IA32_MISC_ENABLE_ENHANCED_SPEEDSTEP (1ULL << 16)
212#define MSR_IA32_MISC_ENABLE_MWAIT (1ULL << 18)
213#define MSR_IA32_MISC_ENABLE_LIMIT_CPUID (1ULL << 22)
214#define MSR_IA32_MISC_ENABLE_XTPR_DISABLE (1ULL << 23)
215#define MSR_IA32_MISC_ENABLE_XD_DISABLE (1ULL << 34)
216
217/* MISC_ENABLE bits: model-specific, meaning may vary from core to core */
218#define MSR_IA32_MISC_ENABLE_X87_COMPAT (1ULL << 2)
219#define MSR_IA32_MISC_ENABLE_TM1 (1ULL << 3)
220#define MSR_IA32_MISC_ENABLE_SPLIT_LOCK_DISABLE (1ULL << 4)
221#define MSR_IA32_MISC_ENABLE_L3CACHE_DISABLE (1ULL << 6)
222#define MSR_IA32_MISC_ENABLE_SUPPRESS_LOCK (1ULL << 8)
223#define MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE (1ULL << 9)
224#define MSR_IA32_MISC_ENABLE_FERR (1ULL << 10)
225#define MSR_IA32_MISC_ENABLE_FERR_MULTIPLEX (1ULL << 10)
226#define MSR_IA32_MISC_ENABLE_TM2 (1ULL << 13)
227#define MSR_IA32_MISC_ENABLE_ADJ_PREF_DISABLE (1ULL << 19)
228#define MSR_IA32_MISC_ENABLE_SPEEDSTEP_LOCK (1ULL << 20)
229#define MSR_IA32_MISC_ENABLE_L1D_CONTEXT (1ULL << 24)
230#define MSR_IA32_MISC_ENABLE_DCU_PREF_DISABLE (1ULL << 37)
231#define MSR_IA32_MISC_ENABLE_TURBO_DISABLE (1ULL << 38)
232#define MSR_IA32_MISC_ENABLE_IP_PREF_DISABLE (1ULL << 39)
233
205/* Intel Model 6 */ 234/* Intel Model 6 */
206#define MSR_P6_EVNTSEL0 0x00000186 235#define MSR_P6_EVNTSEL0 0x00000186
207#define MSR_P6_EVNTSEL1 0x00000187 236#define MSR_P6_EVNTSEL1 0x00000187
diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h
index cb7c151a8bff..dd14c54ac718 100644
--- a/arch/x86/include/asm/pgalloc.h
+++ b/arch/x86/include/asm/pgalloc.h
@@ -42,6 +42,7 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
42 42
43static inline void pte_free(struct mm_struct *mm, struct page *pte) 43static inline void pte_free(struct mm_struct *mm, struct page *pte)
44{ 44{
45 pgtable_page_dtor(pte);
45 __free_page(pte); 46 __free_page(pte);
46} 47}
47 48
diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h
index 9c6797c3e56c..c0b0bda754ee 100644
--- a/arch/x86/include/asm/syscalls.h
+++ b/arch/x86/include/asm/syscalls.h
@@ -40,7 +40,7 @@ asmlinkage int sys_sigaction(int, const struct old_sigaction __user *,
40 struct old_sigaction __user *); 40 struct old_sigaction __user *);
41asmlinkage int sys_sigaltstack(unsigned long); 41asmlinkage int sys_sigaltstack(unsigned long);
42asmlinkage unsigned long sys_sigreturn(unsigned long); 42asmlinkage unsigned long sys_sigreturn(unsigned long);
43asmlinkage int sys_rt_sigreturn(struct pt_regs); 43asmlinkage int sys_rt_sigreturn(unsigned long);
44 44
45/* kernel/ioport.c */ 45/* kernel/ioport.c */
46asmlinkage long sys_iopl(unsigned long); 46asmlinkage long sys_iopl(unsigned long);
diff --git a/arch/x86/include/asm/timex.h b/arch/x86/include/asm/timex.h
index 1287dc1347d6..b5c9d45c981f 100644
--- a/arch/x86/include/asm/timex.h
+++ b/arch/x86/include/asm/timex.h
@@ -1,18 +1,13 @@
1/* x86 architecture timex specifications */
2#ifndef _ASM_X86_TIMEX_H 1#ifndef _ASM_X86_TIMEX_H
3#define _ASM_X86_TIMEX_H 2#define _ASM_X86_TIMEX_H
4 3
5#include <asm/processor.h> 4#include <asm/processor.h>
6#include <asm/tsc.h> 5#include <asm/tsc.h>
7 6
8#ifdef CONFIG_X86_ELAN 7/* The PIT ticks at this frequency (in HZ): */
9# define PIT_TICK_RATE 1189200 /* AMD Elan has different frequency! */ 8#define PIT_TICK_RATE 1193182
10#elif defined(CONFIG_X86_RDC321X) 9
11# define PIT_TICK_RATE 1041667 /* Underlying HZ for R8610 */ 10#define CLOCK_TICK_RATE PIT_TICK_RATE
12#else
13# define PIT_TICK_RATE 1193182 /* Underlying HZ */
14#endif
15#define CLOCK_TICK_RATE PIT_TICK_RATE
16 11
17#define ARCH_HAS_READ_CURRENT_TIMER 12#define ARCH_HAS_READ_CURRENT_TIMER
18 13
diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index 0f830e4f5675..4b6df2469fe3 100644
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -895,6 +895,10 @@ void disable_local_APIC(void)
895{ 895{
896 unsigned int value; 896 unsigned int value;
897 897
898 /* APIC hasn't been mapped yet */
899 if (!apic_phys)
900 return;
901
898 clear_local_APIC(); 902 clear_local_APIC();
899 903
900 /* 904 /*
@@ -1833,6 +1837,11 @@ void __cpuinit generic_processor_info(int apicid, int version)
1833 num_processors++; 1837 num_processors++;
1834 cpu = cpumask_next_zero(-1, cpu_present_mask); 1838 cpu = cpumask_next_zero(-1, cpu_present_mask);
1835 1839
1840 if (version != apic_version[boot_cpu_physical_apicid])
1841 WARN_ONCE(1,
1842 "ACPI: apic version mismatch, bootcpu: %x cpu %d: %x\n",
1843 apic_version[boot_cpu_physical_apicid], cpu, version);
1844
1836 physid_set(apicid, phys_cpu_present_map); 1845 physid_set(apicid, phys_cpu_present_map);
1837 if (apicid == boot_cpu_physical_apicid) { 1846 if (apicid == boot_cpu_physical_apicid) {
1838 /* 1847 /*
diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index 6f11e029e8c5..4b1c319d30c3 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -145,13 +145,14 @@ typedef union {
145 145
146struct drv_cmd { 146struct drv_cmd {
147 unsigned int type; 147 unsigned int type;
148 cpumask_var_t mask; 148 const struct cpumask *mask;
149 drv_addr_union addr; 149 drv_addr_union addr;
150 u32 val; 150 u32 val;
151}; 151};
152 152
153static void do_drv_read(struct drv_cmd *cmd) 153static long do_drv_read(void *_cmd)
154{ 154{
155 struct drv_cmd *cmd = _cmd;
155 u32 h; 156 u32 h;
156 157
157 switch (cmd->type) { 158 switch (cmd->type) {
@@ -166,10 +167,12 @@ static void do_drv_read(struct drv_cmd *cmd)
166 default: 167 default:
167 break; 168 break;
168 } 169 }
170 return 0;
169} 171}
170 172
171static void do_drv_write(struct drv_cmd *cmd) 173static long do_drv_write(void *_cmd)
172{ 174{
175 struct drv_cmd *cmd = _cmd;
173 u32 lo, hi; 176 u32 lo, hi;
174 177
175 switch (cmd->type) { 178 switch (cmd->type) {
@@ -186,30 +189,23 @@ static void do_drv_write(struct drv_cmd *cmd)
186 default: 189 default:
187 break; 190 break;
188 } 191 }
192 return 0;
189} 193}
190 194
191static void drv_read(struct drv_cmd *cmd) 195static void drv_read(struct drv_cmd *cmd)
192{ 196{
193 cpumask_t saved_mask = current->cpus_allowed;
194 cmd->val = 0; 197 cmd->val = 0;
195 198
196 set_cpus_allowed_ptr(current, cmd->mask); 199 work_on_cpu(cpumask_any(cmd->mask), do_drv_read, cmd);
197 do_drv_read(cmd);
198 set_cpus_allowed_ptr(current, &saved_mask);
199} 200}
200 201
201static void drv_write(struct drv_cmd *cmd) 202static void drv_write(struct drv_cmd *cmd)
202{ 203{
203 cpumask_t saved_mask = current->cpus_allowed;
204 unsigned int i; 204 unsigned int i;
205 205
206 for_each_cpu(i, cmd->mask) { 206 for_each_cpu(i, cmd->mask) {
207 set_cpus_allowed_ptr(current, cpumask_of(i)); 207 work_on_cpu(i, do_drv_write, cmd);
208 do_drv_write(cmd);
209 } 208 }
210
211 set_cpus_allowed_ptr(current, &saved_mask);
212 return;
213} 209}
214 210
215static u32 get_cur_val(const struct cpumask *mask) 211static u32 get_cur_val(const struct cpumask *mask)
@@ -235,8 +231,7 @@ static u32 get_cur_val(const struct cpumask *mask)
235 return 0; 231 return 0;
236 } 232 }
237 233
238 cpumask_copy(cmd.mask, mask); 234 cmd.mask = mask;
239
240 drv_read(&cmd); 235 drv_read(&cmd);
241 236
242 dprintk("get_cur_val = %u\n", cmd.val); 237 dprintk("get_cur_val = %u\n", cmd.val);
@@ -368,7 +363,7 @@ static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
368 return freq; 363 return freq;
369} 364}
370 365
371static unsigned int check_freqs(const cpumask_t *mask, unsigned int freq, 366static unsigned int check_freqs(const struct cpumask *mask, unsigned int freq,
372 struct acpi_cpufreq_data *data) 367 struct acpi_cpufreq_data *data)
373{ 368{
374 unsigned int cur_freq; 369 unsigned int cur_freq;
@@ -403,9 +398,6 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
403 return -ENODEV; 398 return -ENODEV;
404 } 399 }
405 400
406 if (unlikely(!alloc_cpumask_var(&cmd.mask, GFP_KERNEL)))
407 return -ENOMEM;
408
409 perf = data->acpi_data; 401 perf = data->acpi_data;
410 result = cpufreq_frequency_table_target(policy, 402 result = cpufreq_frequency_table_target(policy,
411 data->freq_table, 403 data->freq_table,
@@ -450,9 +442,9 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
450 442
451 /* cpufreq holds the hotplug lock, so we are safe from here on */ 443 /* cpufreq holds the hotplug lock, so we are safe from here on */
452 if (policy->shared_type != CPUFREQ_SHARED_TYPE_ANY) 444 if (policy->shared_type != CPUFREQ_SHARED_TYPE_ANY)
453 cpumask_and(cmd.mask, cpu_online_mask, policy->cpus); 445 cmd.mask = policy->cpus;
454 else 446 else
455 cpumask_copy(cmd.mask, cpumask_of(policy->cpu)); 447 cmd.mask = cpumask_of(policy->cpu);
456 448
457 freqs.old = perf->states[perf->state].core_frequency * 1000; 449 freqs.old = perf->states[perf->state].core_frequency * 1000;
458 freqs.new = data->freq_table[next_state].frequency; 450 freqs.new = data->freq_table[next_state].frequency;
@@ -479,7 +471,6 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
479 perf->state = next_perf_state; 471 perf->state = next_perf_state;
480 472
481out: 473out:
482 free_cpumask_var(cmd.mask);
483 return result; 474 return result;
484} 475}
485 476
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 8ea6929e974c..549f2ada55f5 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -29,6 +29,19 @@
29 29
30static void __cpuinit early_init_intel(struct cpuinfo_x86 *c) 30static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
31{ 31{
32 /* Unmask CPUID levels if masked: */
33 if (c->x86 == 6 && c->x86_model >= 15) {
34 u64 misc_enable;
35
36 rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
37
38 if (misc_enable & MSR_IA32_MISC_ENABLE_LIMIT_CPUID) {
39 misc_enable &= ~MSR_IA32_MISC_ENABLE_LIMIT_CPUID;
40 wrmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
41 c->cpuid_level = cpuid_eax(0);
42 }
43 }
44
32 if ((c->x86 == 0xf && c->x86_model >= 0x03) || 45 if ((c->x86 == 0xf && c->x86_model >= 0x03) ||
33 (c->x86 == 0x6 && c->x86_model >= 0x0e)) 46 (c->x86 == 0x6 && c->x86_model >= 0x0e))
34 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); 47 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c
index b59ddcc88cd8..0c0a455fe95c 100644
--- a/arch/x86/kernel/cpu/mtrr/generic.c
+++ b/arch/x86/kernel/cpu/mtrr/generic.c
@@ -33,11 +33,13 @@ u64 mtrr_tom2;
33struct mtrr_state_type mtrr_state = {}; 33struct mtrr_state_type mtrr_state = {};
34EXPORT_SYMBOL_GPL(mtrr_state); 34EXPORT_SYMBOL_GPL(mtrr_state);
35 35
36#undef MODULE_PARAM_PREFIX 36static int __initdata mtrr_show;
37#define MODULE_PARAM_PREFIX "mtrr." 37static int __init mtrr_debug(char *opt)
38 38{
39static int mtrr_show; 39 mtrr_show = 1;
40module_param_named(show, mtrr_show, bool, 0); 40 return 0;
41}
42early_param("mtrr.show", mtrr_debug);
41 43
42/* 44/*
43 * Returns the effective MTRR type for the region 45 * Returns the effective MTRR type for the region
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 55c46074eba0..01161077a49c 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -136,7 +136,7 @@ static void __init setup_cpu_pda_map(void)
136#ifdef CONFIG_X86_64 136#ifdef CONFIG_X86_64
137 137
138/* correctly size the local cpu masks */ 138/* correctly size the local cpu masks */
139static void setup_cpu_local_masks(void) 139static void __init setup_cpu_local_masks(void)
140{ 140{
141 alloc_bootmem_cpumask_var(&cpu_initialized_mask); 141 alloc_bootmem_cpumask_var(&cpu_initialized_mask);
142 alloc_bootmem_cpumask_var(&cpu_callin_mask); 142 alloc_bootmem_cpumask_var(&cpu_callin_mask);
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index 89bb7668041d..df0587f24c54 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -632,9 +632,16 @@ badframe:
632} 632}
633 633
634#ifdef CONFIG_X86_32 634#ifdef CONFIG_X86_32
635asmlinkage int sys_rt_sigreturn(struct pt_regs regs) 635/*
636 * Note: do not pass in pt_regs directly as with tail-call optimization
637 * GCC will incorrectly stomp on the caller's frame and corrupt user-space
638 * register state:
639 */
640asmlinkage int sys_rt_sigreturn(unsigned long __unused)
636{ 641{
637 return do_rt_sigreturn(&regs); 642 struct pt_regs *regs = (struct pt_regs *)&__unused;
643
644 return do_rt_sigreturn(regs);
638} 645}
639#else /* !CONFIG_X86_32 */ 646#else /* !CONFIG_X86_32 */
640asmlinkage long sys_rt_sigreturn(struct pt_regs *regs) 647asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
diff --git a/arch/x86/kernel/tlb_uv.c b/arch/x86/kernel/tlb_uv.c
index f885023167e0..6812b829ed83 100644
--- a/arch/x86/kernel/tlb_uv.c
+++ b/arch/x86/kernel/tlb_uv.c
@@ -200,6 +200,7 @@ static int uv_wait_completion(struct bau_desc *bau_desc,
200 destination_timeouts = 0; 200 destination_timeouts = 0;
201 } 201 }
202 } 202 }
203 cpu_relax();
203 } 204 }
204 return FLUSH_COMPLETE; 205 return FLUSH_COMPLETE;
205} 206}
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 23206ba16874..1d3302cc2ddf 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -858,7 +858,7 @@ void __init vmi_init(void)
858#endif 858#endif
859} 859}
860 860
861void vmi_activate(void) 861void __init vmi_activate(void)
862{ 862{
863 unsigned long flags; 863 unsigned long flags;
864 864
diff --git a/arch/x86/lib/usercopy_32.c b/arch/x86/lib/usercopy_32.c
index 4a20b2f9a381..7c8ca91bb9ec 100644
--- a/arch/x86/lib/usercopy_32.c
+++ b/arch/x86/lib/usercopy_32.c
@@ -56,7 +56,7 @@ do { \
56 " jmp 2b\n" \ 56 " jmp 2b\n" \
57 ".previous\n" \ 57 ".previous\n" \
58 _ASM_EXTABLE(0b,3b) \ 58 _ASM_EXTABLE(0b,3b) \
59 : "=d"(res), "=c"(count), "=&a" (__d0), "=&S" (__d1), \ 59 : "=&d"(res), "=&c"(count), "=&a" (__d0), "=&S" (__d1), \
60 "=&D" (__d2) \ 60 "=&D" (__d2) \
61 : "i"(-EFAULT), "0"(count), "1"(count), "3"(src), "4"(dst) \ 61 : "i"(-EFAULT), "0"(count), "1"(count), "3"(src), "4"(dst) \
62 : "memory"); \ 62 : "memory"); \
@@ -218,7 +218,7 @@ long strnlen_user(const char __user *s, long n)
218 " .align 4\n" 218 " .align 4\n"
219 " .long 0b,2b\n" 219 " .long 0b,2b\n"
220 ".previous" 220 ".previous"
221 :"=r" (n), "=D" (s), "=a" (res), "=c" (tmp) 221 :"=&r" (n), "=&D" (s), "=&a" (res), "=&c" (tmp)
222 :"0" (n), "1" (s), "2" (0), "3" (mask) 222 :"0" (n), "1" (s), "2" (0), "3" (mask)
223 :"cc"); 223 :"cc");
224 return res & mask; 224 return res & mask;
diff --git a/arch/x86/lib/usercopy_64.c b/arch/x86/lib/usercopy_64.c
index 64d6c84e6353..ec13cb5f17ed 100644
--- a/arch/x86/lib/usercopy_64.c
+++ b/arch/x86/lib/usercopy_64.c
@@ -32,7 +32,7 @@ do { \
32 " jmp 2b\n" \ 32 " jmp 2b\n" \
33 ".previous\n" \ 33 ".previous\n" \
34 _ASM_EXTABLE(0b,3b) \ 34 _ASM_EXTABLE(0b,3b) \
35 : "=r"(res), "=c"(count), "=&a" (__d0), "=&S" (__d1), \ 35 : "=&r"(res), "=&c"(count), "=&a" (__d0), "=&S" (__d1), \
36 "=&D" (__d2) \ 36 "=&D" (__d2) \
37 : "i"(-EFAULT), "0"(count), "1"(count), "3"(src), "4"(dst) \ 37 : "i"(-EFAULT), "0"(count), "1"(count), "3"(src), "4"(dst) \
38 : "memory"); \ 38 : "memory"); \
@@ -86,7 +86,7 @@ unsigned long __clear_user(void __user *addr, unsigned long size)
86 ".previous\n" 86 ".previous\n"
87 _ASM_EXTABLE(0b,3b) 87 _ASM_EXTABLE(0b,3b)
88 _ASM_EXTABLE(1b,2b) 88 _ASM_EXTABLE(1b,2b)
89 : [size8] "=c"(size), [dst] "=&D" (__d0) 89 : [size8] "=&c"(size), [dst] "=&D" (__d0)
90 : [size1] "r"(size & 7), "[size8]" (size / 8), "[dst]"(addr), 90 : [size1] "r"(size & 7), "[size8]" (size / 8), "[dst]"(addr),
91 [zero] "r" (0UL), [eight] "r" (8UL)); 91 [zero] "r" (0UL), [eight] "r" (8UL));
92 return size; 92 return size;
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 88f1b10de3be..2cef05074413 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -138,6 +138,47 @@ static pte_t * __init one_page_table_init(pmd_t *pmd)
138 return pte_offset_kernel(pmd, 0); 138 return pte_offset_kernel(pmd, 0);
139} 139}
140 140
141static pte_t *__init page_table_kmap_check(pte_t *pte, pmd_t *pmd,
142 unsigned long vaddr, pte_t *lastpte)
143{
144#ifdef CONFIG_HIGHMEM
145 /*
146 * Something (early fixmap) may already have put a pte
147 * page here, which causes the page table allocation
148 * to become nonlinear. Attempt to fix it, and if it
149 * is still nonlinear then we have to bug.
150 */
151 int pmd_idx_kmap_begin = fix_to_virt(FIX_KMAP_END) >> PMD_SHIFT;
152 int pmd_idx_kmap_end = fix_to_virt(FIX_KMAP_BEGIN) >> PMD_SHIFT;
153
154 if (pmd_idx_kmap_begin != pmd_idx_kmap_end
155 && (vaddr >> PMD_SHIFT) >= pmd_idx_kmap_begin
156 && (vaddr >> PMD_SHIFT) <= pmd_idx_kmap_end
157 && ((__pa(pte) >> PAGE_SHIFT) < table_start
158 || (__pa(pte) >> PAGE_SHIFT) >= table_end)) {
159 pte_t *newpte;
160 int i;
161
162 BUG_ON(after_init_bootmem);
163 newpte = alloc_low_page();
164 for (i = 0; i < PTRS_PER_PTE; i++)
165 set_pte(newpte + i, pte[i]);
166
167 paravirt_alloc_pte(&init_mm, __pa(newpte) >> PAGE_SHIFT);
168 set_pmd(pmd, __pmd(__pa(newpte)|_PAGE_TABLE));
169 BUG_ON(newpte != pte_offset_kernel(pmd, 0));
170 __flush_tlb_all();
171
172 paravirt_release_pte(__pa(pte) >> PAGE_SHIFT);
173 pte = newpte;
174 }
175 BUG_ON(vaddr < fix_to_virt(FIX_KMAP_BEGIN - 1)
176 && vaddr > fix_to_virt(FIX_KMAP_END)
177 && lastpte && lastpte + PTRS_PER_PTE != pte);
178#endif
179 return pte;
180}
181
141/* 182/*
142 * This function initializes a certain range of kernel virtual memory 183 * This function initializes a certain range of kernel virtual memory
143 * with new bootmem page tables, everywhere page tables are missing in 184 * with new bootmem page tables, everywhere page tables are missing in
@@ -154,6 +195,7 @@ page_table_range_init(unsigned long start, unsigned long end, pgd_t *pgd_base)
154 unsigned long vaddr; 195 unsigned long vaddr;
155 pgd_t *pgd; 196 pgd_t *pgd;
156 pmd_t *pmd; 197 pmd_t *pmd;
198 pte_t *pte = NULL;
157 199
158 vaddr = start; 200 vaddr = start;
159 pgd_idx = pgd_index(vaddr); 201 pgd_idx = pgd_index(vaddr);
@@ -165,7 +207,8 @@ page_table_range_init(unsigned long start, unsigned long end, pgd_t *pgd_base)
165 pmd = pmd + pmd_index(vaddr); 207 pmd = pmd + pmd_index(vaddr);
166 for (; (pmd_idx < PTRS_PER_PMD) && (vaddr != end); 208 for (; (pmd_idx < PTRS_PER_PMD) && (vaddr != end);
167 pmd++, pmd_idx++) { 209 pmd++, pmd_idx++) {
168 one_page_table_init(pmd); 210 pte = page_table_kmap_check(one_page_table_init(pmd),
211 pmd, vaddr, pte);
169 212
170 vaddr += PMD_SIZE; 213 vaddr += PMD_SIZE;
171 } 214 }
@@ -508,7 +551,6 @@ static void __init early_ioremap_page_table_range_init(pgd_t *pgd_base)
508 * Fixed mappings, only the page table structure has to be 551 * Fixed mappings, only the page table structure has to be
509 * created - mappings will be set by set_fixmap(): 552 * created - mappings will be set by set_fixmap():
510 */ 553 */
511 early_ioremap_clear();
512 vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; 554 vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
513 end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK; 555 end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
514 page_table_range_init(vaddr, end, pgd_base); 556 page_table_range_init(vaddr, end, pgd_base);
@@ -801,7 +843,7 @@ static void __init find_early_table_space(unsigned long end, int use_pse)
801 tables += PAGE_ALIGN(ptes * sizeof(pte_t)); 843 tables += PAGE_ALIGN(ptes * sizeof(pte_t));
802 844
803 /* for fixmap */ 845 /* for fixmap */
804 tables += PAGE_SIZE * 2; 846 tables += PAGE_ALIGN(__end_of_fixed_addresses * sizeof(pte_t));
805 847
806 /* 848 /*
807 * RED-PEN putting page tables only on node 0 could 849 * RED-PEN putting page tables only on node 0 could
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 23f68e77ad1f..e6d36b490250 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -596,7 +596,7 @@ static void __init init_gbpages(void)
596 direct_gbpages = 0; 596 direct_gbpages = 0;
597} 597}
598 598
599static unsigned long __init kernel_physical_mapping_init(unsigned long start, 599static unsigned long __meminit kernel_physical_mapping_init(unsigned long start,
600 unsigned long end, 600 unsigned long end,
601 unsigned long page_size_mask) 601 unsigned long page_size_mask)
602{ 602{
diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c
index d0151d8ce452..ca53224fc56c 100644
--- a/arch/x86/mm/iomap_32.c
+++ b/arch/x86/mm/iomap_32.c
@@ -17,6 +17,7 @@
17 */ 17 */
18 18
19#include <asm/iomap.h> 19#include <asm/iomap.h>
20#include <asm/pat.h>
20#include <linux/module.h> 21#include <linux/module.h>
21 22
22/* Map 'pfn' using fixed map 'type' and protections 'prot' 23/* Map 'pfn' using fixed map 'type' and protections 'prot'
@@ -29,6 +30,15 @@ iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot)
29 30
30 pagefault_disable(); 31 pagefault_disable();
31 32
33 /*
34 * For non-PAT systems, promote PAGE_KERNEL_WC to PAGE_KERNEL_UC_MINUS.
35 * PAGE_KERNEL_WC maps to PWT, which translates to uncached if the
36 * MTRR is UC or WC. UC_MINUS gets the real intention, of the
37 * user, which is "WC if the MTRR is WC, UC if you can't do that."
38 */
39 if (!pat_enabled && pgprot_val(prot) == pgprot_val(PAGE_KERNEL_WC))
40 prot = PAGE_KERNEL_UC_MINUS;
41
32 idx = type + KM_TYPE_NR*smp_processor_id(); 42 idx = type + KM_TYPE_NR*smp_processor_id();
33 vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); 43 vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
34 set_pte(kmap_pte-idx, pfn_pte(pfn, prot)); 44 set_pte(kmap_pte-idx, pfn_pte(pfn, prot));
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index bd85d42819e1..af750ab973b6 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -557,34 +557,9 @@ void __init early_ioremap_init(void)
557 } 557 }
558} 558}
559 559
560void __init early_ioremap_clear(void)
561{
562 pmd_t *pmd;
563
564 if (early_ioremap_debug)
565 printk(KERN_INFO "early_ioremap_clear()\n");
566
567 pmd = early_ioremap_pmd(fix_to_virt(FIX_BTMAP_BEGIN));
568 pmd_clear(pmd);
569 paravirt_release_pte(__pa(bm_pte) >> PAGE_SHIFT);
570 __flush_tlb_all();
571}
572
573void __init early_ioremap_reset(void) 560void __init early_ioremap_reset(void)
574{ 561{
575 enum fixed_addresses idx;
576 unsigned long addr, phys;
577 pte_t *pte;
578
579 after_paging_init = 1; 562 after_paging_init = 1;
580 for (idx = FIX_BTMAP_BEGIN; idx >= FIX_BTMAP_END; idx--) {
581 addr = fix_to_virt(idx);
582 pte = early_ioremap_pte(addr);
583 if (pte_present(*pte)) {
584 phys = pte_val(*pte) & PAGE_MASK;
585 set_fixmap(idx, phys);
586 }
587 }
588} 563}
589 564
590static void __init __early_set_fixmap(enum fixed_addresses idx, 565static void __init __early_set_fixmap(enum fixed_addresses idx,
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index e89d24815f26..84ba74820ad6 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -534,6 +534,36 @@ out_unlock:
534 return 0; 534 return 0;
535} 535}
536 536
537static int __cpa_process_fault(struct cpa_data *cpa, unsigned long vaddr,
538 int primary)
539{
540 /*
541 * Ignore all non primary paths.
542 */
543 if (!primary)
544 return 0;
545
546 /*
547 * Ignore the NULL PTE for kernel identity mapping, as it is expected
548 * to have holes.
549 * Also set numpages to '1' indicating that we processed cpa req for
550 * one virtual address page and its pfn. TBD: numpages can be set based
551 * on the initial value and the level returned by lookup_address().
552 */
553 if (within(vaddr, PAGE_OFFSET,
554 PAGE_OFFSET + (max_pfn_mapped << PAGE_SHIFT))) {
555 cpa->numpages = 1;
556 cpa->pfn = __pa(vaddr) >> PAGE_SHIFT;
557 return 0;
558 } else {
559 WARN(1, KERN_WARNING "CPA: called for zero pte. "
560 "vaddr = %lx cpa->vaddr = %lx\n", vaddr,
561 *cpa->vaddr);
562
563 return -EFAULT;
564 }
565}
566
537static int __change_page_attr(struct cpa_data *cpa, int primary) 567static int __change_page_attr(struct cpa_data *cpa, int primary)
538{ 568{
539 unsigned long address; 569 unsigned long address;
@@ -549,17 +579,11 @@ static int __change_page_attr(struct cpa_data *cpa, int primary)
549repeat: 579repeat:
550 kpte = lookup_address(address, &level); 580 kpte = lookup_address(address, &level);
551 if (!kpte) 581 if (!kpte)
552 return 0; 582 return __cpa_process_fault(cpa, address, primary);
553 583
554 old_pte = *kpte; 584 old_pte = *kpte;
555 if (!pte_val(old_pte)) { 585 if (!pte_val(old_pte))
556 if (!primary) 586 return __cpa_process_fault(cpa, address, primary);
557 return 0;
558 WARN(1, KERN_WARNING "CPA: called for zero pte. "
559 "vaddr = %lx cpa->vaddr = %lx\n", address,
560 *cpa->vaddr);
561 return -EINVAL;
562 }
563 587
564 if (level == PG_LEVEL_4K) { 588 if (level == PG_LEVEL_4K) {
565 pte_t new_pte; 589 pte_t new_pte;
@@ -657,12 +681,7 @@ static int cpa_process_alias(struct cpa_data *cpa)
657 vaddr = *cpa->vaddr; 681 vaddr = *cpa->vaddr;
658 682
659 if (!(within(vaddr, PAGE_OFFSET, 683 if (!(within(vaddr, PAGE_OFFSET,
660 PAGE_OFFSET + (max_low_pfn_mapped << PAGE_SHIFT)) 684 PAGE_OFFSET + (max_pfn_mapped << PAGE_SHIFT)))) {
661#ifdef CONFIG_X86_64
662 || within(vaddr, PAGE_OFFSET + (1UL<<32),
663 PAGE_OFFSET + (max_pfn_mapped << PAGE_SHIFT))
664#endif
665 )) {
666 685
667 alias_cpa = *cpa; 686 alias_cpa = *cpa;
668 temp_cpa_vaddr = (unsigned long) __va(cpa->pfn << PAGE_SHIFT); 687 temp_cpa_vaddr = (unsigned long) __va(cpa->pfn << PAGE_SHIFT);
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 8b08fb955274..7b61036427df 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -333,11 +333,23 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
333 req_type & _PAGE_CACHE_MASK); 333 req_type & _PAGE_CACHE_MASK);
334 } 334 }
335 335
336 is_range_ram = pagerange_is_ram(start, end); 336 if (new_type)
337 if (is_range_ram == 1) 337 *new_type = actual_type;
338 return reserve_ram_pages_type(start, end, req_type, new_type); 338
339 else if (is_range_ram < 0) 339 /*
340 return -EINVAL; 340 * For legacy reasons, some parts of the physical address range in the
341 * legacy 1MB region is treated as non-RAM (even when listed as RAM in
342 * the e820 tables). So we will track the memory attributes of this
343 * legacy 1MB region using the linear memtype_list always.
344 */
345 if (end >= ISA_END_ADDRESS) {
346 is_range_ram = pagerange_is_ram(start, end);
347 if (is_range_ram == 1)
348 return reserve_ram_pages_type(start, end, req_type,
349 new_type);
350 else if (is_range_ram < 0)
351 return -EINVAL;
352 }
341 353
342 new = kmalloc(sizeof(struct memtype), GFP_KERNEL); 354 new = kmalloc(sizeof(struct memtype), GFP_KERNEL);
343 if (!new) 355 if (!new)
@@ -347,9 +359,6 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
347 new->end = end; 359 new->end = end;
348 new->type = actual_type; 360 new->type = actual_type;
349 361
350 if (new_type)
351 *new_type = actual_type;
352
353 spin_lock(&memtype_lock); 362 spin_lock(&memtype_lock);
354 363
355 if (cached_entry && start >= cached_start) 364 if (cached_entry && start >= cached_start)
@@ -437,11 +446,19 @@ int free_memtype(u64 start, u64 end)
437 if (is_ISA_range(start, end - 1)) 446 if (is_ISA_range(start, end - 1))
438 return 0; 447 return 0;
439 448
440 is_range_ram = pagerange_is_ram(start, end); 449 /*
441 if (is_range_ram == 1) 450 * For legacy reasons, some parts of the physical address range in the
442 return free_ram_pages_type(start, end); 451 * legacy 1MB region is treated as non-RAM (even when listed as RAM in
443 else if (is_range_ram < 0) 452 * the e820 tables). So we will track the memory attributes of this
444 return -EINVAL; 453 * legacy 1MB region using the linear memtype_list always.
454 */
455 if (end >= ISA_END_ADDRESS) {
456 is_range_ram = pagerange_is_ram(start, end);
457 if (is_range_ram == 1)
458 return free_ram_pages_type(start, end);
459 else if (is_range_ram < 0)
460 return -EINVAL;
461 }
445 462
446 spin_lock(&memtype_lock); 463 spin_lock(&memtype_lock);
447 list_for_each_entry(entry, &memtype_list, nd) { 464 list_for_each_entry(entry, &memtype_list, nd) {
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 8dc7109d61b7..2ba8f95516a0 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -298,6 +298,14 @@ static int decrease_reservation(unsigned long nr_pages)
298 frame_list[i] = pfn_to_mfn(pfn); 298 frame_list[i] = pfn_to_mfn(pfn);
299 299
300 scrub_page(page); 300 scrub_page(page);
301
302 if (!PageHighMem(page)) {
303 ret = HYPERVISOR_update_va_mapping(
304 (unsigned long)__va(pfn << PAGE_SHIFT),
305 __pte_ma(0), 0);
306 BUG_ON(ret);
307 }
308
301 } 309 }
302 310
303 /* Ensure that ballooned highmem pages don't have kmaps. */ 311 /* Ensure that ballooned highmem pages don't have kmaps. */
diff --git a/drivers/xen/xenfs/xenbus.c b/drivers/xen/xenfs/xenbus.c
index 875a4c59c594..a9592d981b10 100644
--- a/drivers/xen/xenfs/xenbus.c
+++ b/drivers/xen/xenfs/xenbus.c
@@ -291,7 +291,7 @@ static void watch_fired(struct xenbus_watch *watch,
291static int xenbus_write_transaction(unsigned msg_type, 291static int xenbus_write_transaction(unsigned msg_type,
292 struct xenbus_file_priv *u) 292 struct xenbus_file_priv *u)
293{ 293{
294 int rc, ret; 294 int rc;
295 void *reply; 295 void *reply;
296 struct xenbus_transaction_holder *trans = NULL; 296 struct xenbus_transaction_holder *trans = NULL;
297 LIST_HEAD(staging_q); 297 LIST_HEAD(staging_q);
@@ -326,15 +326,14 @@ static int xenbus_write_transaction(unsigned msg_type,
326 } 326 }
327 327
328 mutex_lock(&u->reply_mutex); 328 mutex_lock(&u->reply_mutex);
329 ret = queue_reply(&staging_q, &u->u.msg, sizeof(u->u.msg)); 329 rc = queue_reply(&staging_q, &u->u.msg, sizeof(u->u.msg));
330 if (!ret) 330 if (!rc)
331 ret = queue_reply(&staging_q, reply, u->u.msg.len); 331 rc = queue_reply(&staging_q, reply, u->u.msg.len);
332 if (!ret) { 332 if (!rc) {
333 list_splice_tail(&staging_q, &u->read_buffers); 333 list_splice_tail(&staging_q, &u->read_buffers);
334 wake_up(&u->read_waitq); 334 wake_up(&u->read_waitq);
335 } else { 335 } else {
336 queue_cleanup(&staging_q); 336 queue_cleanup(&staging_q);
337 rc = ret;
338 } 337 }
339 mutex_unlock(&u->reply_mutex); 338 mutex_unlock(&u->reply_mutex);
340 339
diff --git a/include/asm-generic/bitops/__ffs.h b/include/asm-generic/bitops/__ffs.h
index 9a3274aecf83..937d7c435575 100644
--- a/include/asm-generic/bitops/__ffs.h
+++ b/include/asm-generic/bitops/__ffs.h
@@ -9,7 +9,7 @@
9 * 9 *
10 * Undefined if no bit exists, so code should check against 0 first. 10 * Undefined if no bit exists, so code should check against 0 first.
11 */ 11 */
12static inline unsigned long __ffs(unsigned long word) 12static __always_inline unsigned long __ffs(unsigned long word)
13{ 13{
14 int num = 0; 14 int num = 0;
15 15
diff --git a/include/asm-generic/bitops/__fls.h b/include/asm-generic/bitops/__fls.h
index be24465403d6..a60a7ccb6782 100644
--- a/include/asm-generic/bitops/__fls.h
+++ b/include/asm-generic/bitops/__fls.h
@@ -9,7 +9,7 @@
9 * 9 *
10 * Undefined if no set bit exists, so code should check against 0 first. 10 * Undefined if no set bit exists, so code should check against 0 first.
11 */ 11 */
12static inline unsigned long __fls(unsigned long word) 12static __always_inline unsigned long __fls(unsigned long word)
13{ 13{
14 int num = BITS_PER_LONG - 1; 14 int num = BITS_PER_LONG - 1;
15 15
diff --git a/include/asm-generic/bitops/fls.h b/include/asm-generic/bitops/fls.h
index 850859bc5069..0576d1f42f43 100644
--- a/include/asm-generic/bitops/fls.h
+++ b/include/asm-generic/bitops/fls.h
@@ -9,7 +9,7 @@
9 * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32. 9 * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
10 */ 10 */
11 11
12static inline int fls(int x) 12static __always_inline int fls(int x)
13{ 13{
14 int r = 32; 14 int r = 32;
15 15
diff --git a/include/asm-generic/bitops/fls64.h b/include/asm-generic/bitops/fls64.h
index 86d403f8b256..b097cf8444e3 100644
--- a/include/asm-generic/bitops/fls64.h
+++ b/include/asm-generic/bitops/fls64.h
@@ -15,7 +15,7 @@
15 * at position 64. 15 * at position 64.
16 */ 16 */
17#if BITS_PER_LONG == 32 17#if BITS_PER_LONG == 32
18static inline int fls64(__u64 x) 18static __always_inline int fls64(__u64 x)
19{ 19{
20 __u32 h = x >> 32; 20 __u32 h = x >> 32;
21 if (h) 21 if (h)
@@ -23,7 +23,7 @@ static inline int fls64(__u64 x)
23 return fls(x); 23 return fls(x);
24} 24}
25#elif BITS_PER_LONG == 64 25#elif BITS_PER_LONG == 64
26static inline int fls64(__u64 x) 26static __always_inline int fls64(__u64 x)
27{ 27{
28 if (x == 0) 28 if (x == 0)
29 return 0; 29 return 0;
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 2f445833ae37..1f0c509b40d3 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -971,6 +971,8 @@ undo:
971} 971}
972 972
973#ifdef CONFIG_SMP 973#ifdef CONFIG_SMP
974static struct workqueue_struct *work_on_cpu_wq __read_mostly;
975
974struct work_for_cpu { 976struct work_for_cpu {
975 struct work_struct work; 977 struct work_struct work;
976 long (*fn)(void *); 978 long (*fn)(void *);
@@ -991,8 +993,8 @@ static void do_work_for_cpu(struct work_struct *w)
991 * @fn: the function to run 993 * @fn: the function to run
992 * @arg: the function arg 994 * @arg: the function arg
993 * 995 *
994 * This will return -EINVAL in the cpu is not online, or the return value 996 * This will return the value @fn returns.
995 * of @fn otherwise. 997 * It is up to the caller to ensure that the cpu doesn't go offline.
996 */ 998 */
997long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg) 999long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg)
998{ 1000{
@@ -1001,14 +1003,8 @@ long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg)
1001 INIT_WORK(&wfc.work, do_work_for_cpu); 1003 INIT_WORK(&wfc.work, do_work_for_cpu);
1002 wfc.fn = fn; 1004 wfc.fn = fn;
1003 wfc.arg = arg; 1005 wfc.arg = arg;
1004 get_online_cpus(); 1006 queue_work_on(cpu, work_on_cpu_wq, &wfc.work);
1005 if (unlikely(!cpu_online(cpu))) 1007 flush_work(&wfc.work);
1006 wfc.ret = -EINVAL;
1007 else {
1008 schedule_work_on(cpu, &wfc.work);
1009 flush_work(&wfc.work);
1010 }
1011 put_online_cpus();
1012 1008
1013 return wfc.ret; 1009 return wfc.ret;
1014} 1010}
@@ -1025,4 +1021,8 @@ void __init init_workqueues(void)
1025 hotcpu_notifier(workqueue_cpu_callback, 0); 1021 hotcpu_notifier(workqueue_cpu_callback, 0);
1026 keventd_wq = create_workqueue("events"); 1022 keventd_wq = create_workqueue("events");
1027 BUG_ON(!keventd_wq); 1023 BUG_ON(!keventd_wq);
1024#ifdef CONFIG_SMP
1025 work_on_cpu_wq = create_workqueue("work_on_cpu");
1026 BUG_ON(!work_on_cpu_wq);
1027#endif
1028} 1028}
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 4c9ae6085c75..d30561dda907 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -570,6 +570,15 @@ config DEBUG_NOTIFIERS
570 This is a relatively cheap check but if you care about maximum 570 This is a relatively cheap check but if you care about maximum
571 performance, say N. 571 performance, say N.
572 572
573#
574# Select this config option from the architecture Kconfig, if it
575# it is preferred to always offer frame pointers as a config
576# option on the architecture (regardless of KERNEL_DEBUG):
577#
578config ARCH_WANT_FRAME_POINTERS
579 bool
580 help
581
573config FRAME_POINTER 582config FRAME_POINTER
574 bool "Compile the kernel with frame pointers" 583 bool "Compile the kernel with frame pointers"
575 depends on DEBUG_KERNEL && \ 584 depends on DEBUG_KERNEL && \