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authorLinus Torvalds <torvalds@linux-foundation.org>2011-01-07 20:02:58 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-07 20:02:58 -0500
commit72eb6a791459c87a0340318840bb3bd9252b627b (patch)
tree3bfb8ad99f9c7e511f37f72d57b56a2cea06d753
parent23d69b09b78c4876e134f104a3814c30747c53f1 (diff)
parent55ee4ef30241a62b700f79517e6d5ef2ddbefa67 (diff)
Merge branch 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
* 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (30 commits) gameport: use this_cpu_read instead of lookup x86: udelay: Use this_cpu_read to avoid address calculation x86: Use this_cpu_inc_return for nmi counter x86: Replace uses of current_cpu_data with this_cpu ops x86: Use this_cpu_ops to optimize code vmstat: User per cpu atomics to avoid interrupt disable / enable irq_work: Use per cpu atomics instead of regular atomics cpuops: Use cmpxchg for xchg to avoid lock semantics x86: this_cpu_cmpxchg and this_cpu_xchg operations percpu: Generic this_cpu_cmpxchg() and this_cpu_xchg support percpu,x86: relocate this_cpu_add_return() and friends connector: Use this_cpu operations xen: Use this_cpu_inc_return taskstats: Use this_cpu_ops random: Use this_cpu_inc_return fs: Use this_cpu_inc_return in buffer.c highmem: Use this_cpu_xx_return() operations vmstat: Use this_cpu_inc_return for vm statistics x86: Support for this_cpu_add, sub, dec, inc_return percpu: Generic support for this_cpu_add, sub, dec, inc_return ... Fixed up conflicts: in arch/x86/kernel/{apic/nmi.c, apic/x2apic_uv_x.c, process.c} as per Tejun.
Diffstat
-rw-r--r--MAINTAINERS10
-rw-r--r--arch/x86/Kconfig.cpu3
-rw-r--r--arch/x86/include/asm/debugreg.h2
-rw-r--r--arch/x86/include/asm/percpu.h158
-rw-r--r--arch/x86/include/asm/processor.h3
-rw-r--r--arch/x86/kernel/apic/apic.c2
-rw-r--r--arch/x86/kernel/apic/io_apic.c4
-rw-r--r--arch/x86/kernel/apic/x2apic_uv_x.c8
-rw-r--r--arch/x86/kernel/cpu/amd.c2
-rw-r--r--arch/x86/kernel/cpu/cpufreq/powernow-k8.c4
-rw-r--r--arch/x86/kernel/cpu/intel_cacheinfo.c4
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce.c20
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_intel.c2
-rw-r--r--arch/x86/kernel/cpu/perf_event.c27
-rw-r--r--arch/x86/kernel/cpu/perf_event_intel.c4
-rw-r--r--arch/x86/kernel/ftrace.c6
-rw-r--r--arch/x86/kernel/hw_breakpoint.c12
-rw-r--r--arch/x86/kernel/irq.c6
-rw-r--r--arch/x86/kernel/irq_32.c4
-rw-r--r--arch/x86/kernel/kprobes.c14
-rw-r--r--arch/x86/kernel/process.c4
-rw-r--r--arch/x86/kernel/smpboot.c14
-rw-r--r--arch/x86/kernel/tsc.c2
-rw-r--r--arch/x86/kvm/x86.c8
-rw-r--r--arch/x86/lib/delay.c2
-rw-r--r--arch/x86/oprofile/nmi_int.c2
-rw-r--r--arch/x86/oprofile/op_model_ppro.c8
-rw-r--r--arch/x86/xen/enlighten.c4
-rw-r--r--arch/x86/xen/multicalls.h2
-rw-r--r--arch/x86/xen/spinlock.c8
-rw-r--r--arch/x86/xen/time.c8
-rw-r--r--drivers/acpi/processor_idle.c6
-rw-r--r--drivers/char/random.c2
-rw-r--r--drivers/connector/cn_proc.c5
-rw-r--r--drivers/cpuidle/cpuidle.c2
-rw-r--r--drivers/input/gameport/gameport.c2
-rw-r--r--drivers/s390/cio/cio.c2
-rw-r--r--drivers/staging/lirc/lirc_serial.c4
-rw-r--r--drivers/staging/speakup/fakekey.c11
-rw-r--r--drivers/xen/events.c10
-rw-r--r--fs/buffer.c37
-rw-r--r--include/asm-generic/irq_regs.h8
-rw-r--r--include/linux/elevator.h12
-rw-r--r--include/linux/highmem.h13
-rw-r--r--include/linux/kernel_stat.h2
-rw-r--r--include/linux/kprobes.h4
-rw-r--r--include/linux/percpu.h205
-rw-r--r--kernel/exit.c2
-rw-r--r--kernel/fork.c2
-rw-r--r--kernel/hrtimer.c2
-rw-r--r--kernel/irq_work.c18
-rw-r--r--kernel/kprobes.c8
-rw-r--r--kernel/rcutree.c4
-rw-r--r--kernel/softirq.c42
-rw-r--r--kernel/taskstats.c5
-rw-r--r--kernel/time/tick-common.c2
-rw-r--r--kernel/time/tick-oneshot.c4
-rw-r--r--kernel/watchdog.c36
-rw-r--r--lib/percpu_counter.c8
-rw-r--r--mm/percpu.c8
-rw-r--r--mm/slab.c6
-rw-r--r--mm/vmstat.c149
62 files changed, 703 insertions, 275 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index 78d317c545b9..23d04363a195 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4653,6 +4653,16 @@ S: Maintained
4653F: crypto/pcrypt.c 4653F: crypto/pcrypt.c
4654F: include/crypto/pcrypt.h 4654F: include/crypto/pcrypt.h
4655 4655
4656PER-CPU MEMORY ALLOCATOR
4657M: Tejun Heo <tj@kernel.org>
4658M: Christoph Lameter <cl@linux-foundation.org>
4659L: linux-kernel@vger.kernel.org
4660T: git git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu.git
4661S: Maintained
4662F: include/linux/percpu*.h
4663F: mm/percpu*.c
4664F: arch/*/include/asm/percpu.h
4665
4656PER-TASK DELAY ACCOUNTING 4666PER-TASK DELAY ACCOUNTING
4657M: Balbir Singh <balbir@linux.vnet.ibm.com> 4667M: Balbir Singh <balbir@linux.vnet.ibm.com>
4658S: Maintained 4668S: Maintained
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 2ac9069890cd..15588a0ef466 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -310,6 +310,9 @@ config X86_INTERNODE_CACHE_SHIFT
310config X86_CMPXCHG 310config X86_CMPXCHG
311 def_bool X86_64 || (X86_32 && !M386) 311 def_bool X86_64 || (X86_32 && !M386)
312 312
313config CMPXCHG_LOCAL
314 def_bool X86_64 || (X86_32 && !M386)
315
313config X86_L1_CACHE_SHIFT 316config X86_L1_CACHE_SHIFT
314 int 317 int
315 default "7" if MPENTIUM4 || MPSC 318 default "7" if MPENTIUM4 || MPSC
diff --git a/arch/x86/include/asm/debugreg.h b/arch/x86/include/asm/debugreg.h
index b81002f23614..078ad0caefc6 100644
--- a/arch/x86/include/asm/debugreg.h
+++ b/arch/x86/include/asm/debugreg.h
@@ -94,7 +94,7 @@ static inline void hw_breakpoint_disable(void)
94 94
95static inline int hw_breakpoint_active(void) 95static inline int hw_breakpoint_active(void)
96{ 96{
97 return __get_cpu_var(cpu_dr7) & DR_GLOBAL_ENABLE_MASK; 97 return __this_cpu_read(cpu_dr7) & DR_GLOBAL_ENABLE_MASK;
98} 98}
99 99
100extern void aout_dump_debugregs(struct user *dump); 100extern void aout_dump_debugregs(struct user *dump);
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index f899e01a8ac9..8ee45167e817 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -230,6 +230,125 @@ do { \
230}) 230})
231 231
232/* 232/*
233 * Add return operation
234 */
235#define percpu_add_return_op(var, val) \
236({ \
237 typeof(var) paro_ret__ = val; \
238 switch (sizeof(var)) { \
239 case 1: \
240 asm("xaddb %0, "__percpu_arg(1) \
241 : "+q" (paro_ret__), "+m" (var) \
242 : : "memory"); \
243 break; \
244 case 2: \
245 asm("xaddw %0, "__percpu_arg(1) \
246 : "+r" (paro_ret__), "+m" (var) \
247 : : "memory"); \
248 break; \
249 case 4: \
250 asm("xaddl %0, "__percpu_arg(1) \
251 : "+r" (paro_ret__), "+m" (var) \
252 : : "memory"); \
253 break; \
254 case 8: \
255 asm("xaddq %0, "__percpu_arg(1) \
256 : "+re" (paro_ret__), "+m" (var) \
257 : : "memory"); \
258 break; \
259 default: __bad_percpu_size(); \
260 } \
261 paro_ret__ += val; \
262 paro_ret__; \
263})
264
265/*
266 * xchg is implemented using cmpxchg without a lock prefix. xchg is
267 * expensive due to the implied lock prefix. The processor cannot prefetch
268 * cachelines if xchg is used.
269 */
270#define percpu_xchg_op(var, nval) \
271({ \
272 typeof(var) pxo_ret__; \
273 typeof(var) pxo_new__ = (nval); \
274 switch (sizeof(var)) { \
275 case 1: \
276 asm("\n1:mov "__percpu_arg(1)",%%al" \
277 "\n\tcmpxchgb %2, "__percpu_arg(1) \
278 "\n\tjnz 1b" \
279 : "=a" (pxo_ret__), "+m" (var) \
280 : "q" (pxo_new__) \
281 : "memory"); \
282 break; \
283 case 2: \
284 asm("\n1:mov "__percpu_arg(1)",%%ax" \
285 "\n\tcmpxchgw %2, "__percpu_arg(1) \
286 "\n\tjnz 1b" \
287 : "=a" (pxo_ret__), "+m" (var) \
288 : "r" (pxo_new__) \
289 : "memory"); \
290 break; \
291 case 4: \
292 asm("\n1:mov "__percpu_arg(1)",%%eax" \
293 "\n\tcmpxchgl %2, "__percpu_arg(1) \
294 "\n\tjnz 1b" \
295 : "=a" (pxo_ret__), "+m" (var) \
296 : "r" (pxo_new__) \
297 : "memory"); \
298 break; \
299 case 8: \
300 asm("\n1:mov "__percpu_arg(1)",%%rax" \
301 "\n\tcmpxchgq %2, "__percpu_arg(1) \
302 "\n\tjnz 1b" \
303 : "=a" (pxo_ret__), "+m" (var) \
304 : "r" (pxo_new__) \
305 : "memory"); \
306 break; \
307 default: __bad_percpu_size(); \
308 } \
309 pxo_ret__; \
310})
311
312/*
313 * cmpxchg has no such implied lock semantics as a result it is much
314 * more efficient for cpu local operations.
315 */
316#define percpu_cmpxchg_op(var, oval, nval) \
317({ \
318 typeof(var) pco_ret__; \
319 typeof(var) pco_old__ = (oval); \
320 typeof(var) pco_new__ = (nval); \
321 switch (sizeof(var)) { \
322 case 1: \
323 asm("cmpxchgb %2, "__percpu_arg(1) \
324 : "=a" (pco_ret__), "+m" (var) \
325 : "q" (pco_new__), "0" (pco_old__) \
326 : "memory"); \
327 break; \
328 case 2: \
329 asm("cmpxchgw %2, "__percpu_arg(1) \
330 : "=a" (pco_ret__), "+m" (var) \
331 : "r" (pco_new__), "0" (pco_old__) \
332 : "memory"); \
333 break; \
334 case 4: \
335 asm("cmpxchgl %2, "__percpu_arg(1) \
336 : "=a" (pco_ret__), "+m" (var) \
337 : "r" (pco_new__), "0" (pco_old__) \
338 : "memory"); \
339 break; \
340 case 8: \
341 asm("cmpxchgq %2, "__percpu_arg(1) \
342 : "=a" (pco_ret__), "+m" (var) \
343 : "r" (pco_new__), "0" (pco_old__) \
344 : "memory"); \
345 break; \
346 default: __bad_percpu_size(); \
347 } \
348 pco_ret__; \
349})
350
351/*
233 * percpu_read() makes gcc load the percpu variable every time it is 352 * percpu_read() makes gcc load the percpu variable every time it is
234 * accessed while percpu_read_stable() allows the value to be cached. 353 * accessed while percpu_read_stable() allows the value to be cached.
235 * percpu_read_stable() is more efficient and can be used if its value 354 * percpu_read_stable() is more efficient and can be used if its value
@@ -267,6 +386,12 @@ do { \
267#define __this_cpu_xor_1(pcp, val) percpu_to_op("xor", (pcp), val) 386#define __this_cpu_xor_1(pcp, val) percpu_to_op("xor", (pcp), val)
268#define __this_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val) 387#define __this_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val)
269#define __this_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val) 388#define __this_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val)
389/*
390 * Generic fallback operations for __this_cpu_xchg_[1-4] are okay and much
391 * faster than an xchg with forced lock semantics.
392 */
393#define __this_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
394#define __this_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
270 395
271#define this_cpu_read_1(pcp) percpu_from_op("mov", (pcp), "m"(pcp)) 396#define this_cpu_read_1(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
272#define this_cpu_read_2(pcp) percpu_from_op("mov", (pcp), "m"(pcp)) 397#define this_cpu_read_2(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
@@ -286,6 +411,11 @@ do { \
286#define this_cpu_xor_1(pcp, val) percpu_to_op("xor", (pcp), val) 411#define this_cpu_xor_1(pcp, val) percpu_to_op("xor", (pcp), val)
287#define this_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val) 412#define this_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val)
288#define this_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val) 413#define this_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val)
414#define this_cpu_xchg_1(pcp, nval) percpu_xchg_op(pcp, nval)
415#define this_cpu_xchg_2(pcp, nval) percpu_xchg_op(pcp, nval)
416#define this_cpu_xchg_4(pcp, nval) percpu_xchg_op(pcp, nval)
417#define this_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
418#define this_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
289 419
290#define irqsafe_cpu_add_1(pcp, val) percpu_add_op((pcp), val) 420#define irqsafe_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
291#define irqsafe_cpu_add_2(pcp, val) percpu_add_op((pcp), val) 421#define irqsafe_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
@@ -299,6 +429,31 @@ do { \
299#define irqsafe_cpu_xor_1(pcp, val) percpu_to_op("xor", (pcp), val) 429#define irqsafe_cpu_xor_1(pcp, val) percpu_to_op("xor", (pcp), val)
300#define irqsafe_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val) 430#define irqsafe_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val)
301#define irqsafe_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val) 431#define irqsafe_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val)
432#define irqsafe_cpu_xchg_1(pcp, nval) percpu_xchg_op(pcp, nval)
433#define irqsafe_cpu_xchg_2(pcp, nval) percpu_xchg_op(pcp, nval)
434#define irqsafe_cpu_xchg_4(pcp, nval) percpu_xchg_op(pcp, nval)
435#define irqsafe_cpu_xchg_8(pcp, nval) percpu_xchg_op(pcp, nval)
436#define irqsafe_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
437
438#ifndef CONFIG_M386
439#define __this_cpu_add_return_1(pcp, val) percpu_add_return_op(pcp, val)
440#define __this_cpu_add_return_2(pcp, val) percpu_add_return_op(pcp, val)
441#define __this_cpu_add_return_4(pcp, val) percpu_add_return_op(pcp, val)
442#define __this_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
443#define __this_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
444#define __this_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
445
446#define this_cpu_add_return_1(pcp, val) percpu_add_return_op(pcp, val)
447#define this_cpu_add_return_2(pcp, val) percpu_add_return_op(pcp, val)
448#define this_cpu_add_return_4(pcp, val) percpu_add_return_op(pcp, val)
449#define this_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
450#define this_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
451#define this_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
452
453#define irqsafe_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
454#define irqsafe_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
455#define irqsafe_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(pcp, oval, nval)
456#endif /* !CONFIG_M386 */
302 457
303/* 458/*
304 * Per cpu atomic 64 bit operations are only available under 64 bit. 459 * Per cpu atomic 64 bit operations are only available under 64 bit.
@@ -311,6 +466,7 @@ do { \
311#define __this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val) 466#define __this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
312#define __this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val) 467#define __this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
313#define __this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val) 468#define __this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
469#define __this_cpu_add_return_8(pcp, val) percpu_add_return_op(pcp, val)
314 470
315#define this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp)) 471#define this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
316#define this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val) 472#define this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
@@ -318,12 +474,12 @@ do { \
318#define this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val) 474#define this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
319#define this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val) 475#define this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
320#define this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val) 476#define this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
477#define this_cpu_add_return_8(pcp, val) percpu_add_return_op(pcp, val)
321 478
322#define irqsafe_cpu_add_8(pcp, val) percpu_add_op((pcp), val) 479#define irqsafe_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
323#define irqsafe_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val) 480#define irqsafe_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
324#define irqsafe_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val) 481#define irqsafe_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
325#define irqsafe_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val) 482#define irqsafe_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
326
327#endif 483#endif
328 484
329/* This is not atomic against other CPUs -- CPU preemption needs to be off */ 485/* This is not atomic against other CPUs -- CPU preemption needs to be off */
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index cae9c3cb95cf..c6efecf85a6a 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -141,10 +141,9 @@ extern __u32 cpu_caps_set[NCAPINTS];
141#ifdef CONFIG_SMP 141#ifdef CONFIG_SMP
142DECLARE_PER_CPU_SHARED_ALIGNED(struct cpuinfo_x86, cpu_info); 142DECLARE_PER_CPU_SHARED_ALIGNED(struct cpuinfo_x86, cpu_info);
143#define cpu_data(cpu) per_cpu(cpu_info, cpu) 143#define cpu_data(cpu) per_cpu(cpu_info, cpu)
144#define current_cpu_data __get_cpu_var(cpu_info)
145#else 144#else
145#define cpu_info boot_cpu_data
146#define cpu_data(cpu) boot_cpu_data 146#define cpu_data(cpu) boot_cpu_data
147#define current_cpu_data boot_cpu_data
148#endif 147#endif
149 148
150extern const struct seq_operations cpuinfo_op; 149extern const struct seq_operations cpuinfo_op;
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index ce65d449b750..79e6baa8aa0a 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -516,7 +516,7 @@ static void __cpuinit setup_APIC_timer(void)
516{ 516{
517 struct clock_event_device *levt = &__get_cpu_var(lapic_events); 517 struct clock_event_device *levt = &__get_cpu_var(lapic_events);
518 518
519 if (cpu_has(&current_cpu_data, X86_FEATURE_ARAT)) { 519 if (cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_ARAT)) {
520 lapic_clockevent.features &= ~CLOCK_EVT_FEAT_C3STOP; 520 lapic_clockevent.features &= ~CLOCK_EVT_FEAT_C3STOP;
521 /* Make LAPIC timer preferrable over percpu HPET */ 521 /* Make LAPIC timer preferrable over percpu HPET */
522 lapic_clockevent.rating = 150; 522 lapic_clockevent.rating = 150;
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 52735a710c30..697dc34b7b87 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2329,7 +2329,7 @@ asmlinkage void smp_irq_move_cleanup_interrupt(void)
2329 unsigned int irr; 2329 unsigned int irr;
2330 struct irq_desc *desc; 2330 struct irq_desc *desc;
2331 struct irq_cfg *cfg; 2331 struct irq_cfg *cfg;
2332 irq = __get_cpu_var(vector_irq)[vector]; 2332 irq = __this_cpu_read(vector_irq[vector]);
2333 2333
2334 if (irq == -1) 2334 if (irq == -1)
2335 continue; 2335 continue;
@@ -2363,7 +2363,7 @@ asmlinkage void smp_irq_move_cleanup_interrupt(void)
2363 apic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR); 2363 apic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR);
2364 goto unlock; 2364 goto unlock;
2365 } 2365 }
2366 __get_cpu_var(vector_irq)[vector] = -1; 2366 __this_cpu_write(vector_irq[vector], -1);
2367unlock: 2367unlock:
2368 raw_spin_unlock(&desc->lock); 2368 raw_spin_unlock(&desc->lock);
2369 } 2369 }
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 2a3f2a7db243..ecca5f41ad2c 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -120,8 +120,8 @@ static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
120 else if (!strcmp(oem_table_id, "UVX")) 120 else if (!strcmp(oem_table_id, "UVX"))
121 uv_system_type = UV_X2APIC; 121 uv_system_type = UV_X2APIC;
122 else if (!strcmp(oem_table_id, "UVH")) { 122 else if (!strcmp(oem_table_id, "UVH")) {
123 __get_cpu_var(x2apic_extra_bits) = 123 __this_cpu_write(x2apic_extra_bits,
124 pnodeid << uvh_apicid.s.pnode_shift; 124 pnodeid << uvh_apicid.s.pnode_shift);
125 uv_system_type = UV_NON_UNIQUE_APIC; 125 uv_system_type = UV_NON_UNIQUE_APIC;
126 uv_set_apicid_hibit(); 126 uv_set_apicid_hibit();
127 return 1; 127 return 1;
@@ -286,7 +286,7 @@ static unsigned int x2apic_get_apic_id(unsigned long x)
286 unsigned int id; 286 unsigned int id;
287 287
288 WARN_ON(preemptible() && num_online_cpus() > 1); 288 WARN_ON(preemptible() && num_online_cpus() > 1);
289 id = x | __get_cpu_var(x2apic_extra_bits); 289 id = x | __this_cpu_read(x2apic_extra_bits);
290 290
291 return id; 291 return id;
292} 292}
@@ -378,7 +378,7 @@ struct apic __refdata apic_x2apic_uv_x = {
378 378
379static __cpuinit void set_x2apic_extra_bits(int pnode) 379static __cpuinit void set_x2apic_extra_bits(int pnode)
380{ 380{
381 __get_cpu_var(x2apic_extra_bits) = (pnode << 6); 381 __this_cpu_write(x2apic_extra_bits, (pnode << 6));
382} 382}
383 383
384/* 384/*
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 9e093f8fe78c..7c7bedb83c5a 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -668,7 +668,7 @@ EXPORT_SYMBOL_GPL(amd_erratum_383);
668 668
669bool cpu_has_amd_erratum(const int *erratum) 669bool cpu_has_amd_erratum(const int *erratum)
670{ 670{
671 struct cpuinfo_x86 *cpu = &current_cpu_data; 671 struct cpuinfo_x86 *cpu = __this_cpu_ptr(&cpu_info);
672 int osvw_id = *erratum++; 672 int osvw_id = *erratum++;
673 u32 range; 673 u32 range;
674 u32 ms; 674 u32 ms;
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 491977baf6c0..35c7e65e59be 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -521,7 +521,7 @@ static void check_supported_cpu(void *_rc)
521 521
522 *rc = -ENODEV; 522 *rc = -ENODEV;
523 523
524 if (current_cpu_data.x86_vendor != X86_VENDOR_AMD) 524 if (__this_cpu_read(cpu_info.x86_vendor) != X86_VENDOR_AMD)
525 return; 525 return;
526 526
527 eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE); 527 eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE);
@@ -1377,7 +1377,7 @@ static int __devexit powernowk8_cpu_exit(struct cpufreq_policy *pol)
1377static void query_values_on_cpu(void *_err) 1377static void query_values_on_cpu(void *_err)
1378{ 1378{
1379 int *err = _err; 1379 int *err = _err;
1380 struct powernow_k8_data *data = __get_cpu_var(powernow_data); 1380 struct powernow_k8_data *data = __this_cpu_read(powernow_data);
1381 1381
1382 *err = query_current_values_with_pending_wait(data); 1382 *err = query_current_values_with_pending_wait(data);
1383} 1383}
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 9ecf81f9b90f..7283e98deaae 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -265,7 +265,7 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
265 line_size = l2.line_size; 265 line_size = l2.line_size;
266 lines_per_tag = l2.lines_per_tag; 266 lines_per_tag = l2.lines_per_tag;
267 /* cpu_data has errata corrections for K7 applied */ 267 /* cpu_data has errata corrections for K7 applied */
268 size_in_kb = current_cpu_data.x86_cache_size; 268 size_in_kb = __this_cpu_read(cpu_info.x86_cache_size);
269 break; 269 break;
270 case 3: 270 case 3:
271 if (!l3.val) 271 if (!l3.val)
@@ -287,7 +287,7 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
287 eax->split.type = types[leaf]; 287 eax->split.type = types[leaf];
288 eax->split.level = levels[leaf]; 288 eax->split.level = levels[leaf];
289 eax->split.num_threads_sharing = 0; 289 eax->split.num_threads_sharing = 0;
290 eax->split.num_cores_on_die = current_cpu_data.x86_max_cores - 1; 290 eax->split.num_cores_on_die = __this_cpu_read(cpu_info.x86_max_cores) - 1;
291 291
292 292
293 if (assoc == 0xffff) 293 if (assoc == 0xffff)
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 7a35b72d7c03..d916183b7f9c 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -326,7 +326,7 @@ static void mce_panic(char *msg, struct mce *final, char *exp)
326 326
327static int msr_to_offset(u32 msr) 327static int msr_to_offset(u32 msr)
328{ 328{
329 unsigned bank = __get_cpu_var(injectm.bank); 329 unsigned bank = __this_cpu_read(injectm.bank);
330 330
331 if (msr == rip_msr) 331 if (msr == rip_msr)
332 return offsetof(struct mce, ip); 332 return offsetof(struct mce, ip);
@@ -346,7 +346,7 @@ static u64 mce_rdmsrl(u32 msr)
346{ 346{
347 u64 v; 347 u64 v;
348 348
349 if (__get_cpu_var(injectm).finished) { 349 if (__this_cpu_read(injectm.finished)) {
350 int offset = msr_to_offset(msr); 350 int offset = msr_to_offset(msr);
351 351
352 if (offset < 0) 352 if (offset < 0)
@@ -369,7 +369,7 @@ static u64 mce_rdmsrl(u32 msr)
369 369
370static void mce_wrmsrl(u32 msr, u64 v) 370static void mce_wrmsrl(u32 msr, u64 v)
371{ 371{
372 if (__get_cpu_var(injectm).finished) { 372 if (__this_cpu_read(injectm.finished)) {
373 int offset = msr_to_offset(msr); 373 int offset = msr_to_offset(msr);
374 374
375 if (offset >= 0) 375 if (offset >= 0)
@@ -1159,7 +1159,7 @@ static void mce_start_timer(unsigned long data)
1159 1159
1160 WARN_ON(smp_processor_id() != data); 1160 WARN_ON(smp_processor_id() != data);
1161 1161
1162 if (mce_available(&current_cpu_data)) { 1162 if (mce_available(__this_cpu_ptr(&cpu_info))) {
1163 machine_check_poll(MCP_TIMESTAMP, 1163 machine_check_poll(MCP_TIMESTAMP,
1164 &__get_cpu_var(mce_poll_banks)); 1164 &__get_cpu_var(mce_poll_banks));
1165 } 1165 }
@@ -1767,7 +1767,7 @@ static int mce_shutdown(struct sys_device *dev)
1767static int mce_resume(struct sys_device *dev) 1767static int mce_resume(struct sys_device *dev)
1768{ 1768{
1769 __mcheck_cpu_init_generic(); 1769 __mcheck_cpu_init_generic();
1770 __mcheck_cpu_init_vendor(&current_cpu_data); 1770 __mcheck_cpu_init_vendor(__this_cpu_ptr(&cpu_info));
1771 1771
1772 return 0; 1772 return 0;
1773} 1773}
@@ -1775,7 +1775,7 @@ static int mce_resume(struct sys_device *dev)
1775static void mce_cpu_restart(void *data) 1775static void mce_cpu_restart(void *data)
1776{ 1776{
1777 del_timer_sync(&__get_cpu_var(mce_timer)); 1777 del_timer_sync(&__get_cpu_var(mce_timer));
1778 if (!mce_available(&current_cpu_data)) 1778 if (!mce_available(__this_cpu_ptr(&cpu_info)))
1779 return; 1779 return;
1780 __mcheck_cpu_init_generic(); 1780 __mcheck_cpu_init_generic();
1781 __mcheck_cpu_init_timer(); 1781 __mcheck_cpu_init_timer();
@@ -1790,7 +1790,7 @@ static void mce_restart(void)
1790/* Toggle features for corrected errors */ 1790/* Toggle features for corrected errors */
1791static void mce_disable_ce(void *all) 1791static void mce_disable_ce(void *all)
1792{ 1792{
1793 if (!mce_available(&current_cpu_data)) 1793 if (!mce_available(__this_cpu_ptr(&cpu_info)))
1794 return; 1794 return;
1795 if (all) 1795 if (all)
1796 del_timer_sync(&__get_cpu_var(mce_timer)); 1796 del_timer_sync(&__get_cpu_var(mce_timer));
@@ -1799,7 +1799,7 @@ static void mce_disable_ce(void *all)
1799 1799
1800static void mce_enable_ce(void *all) 1800static void mce_enable_ce(void *all)
1801{ 1801{
1802 if (!mce_available(&current_cpu_data)) 1802 if (!mce_available(__this_cpu_ptr(&cpu_info)))
1803 return; 1803 return;
1804 cmci_reenable(); 1804 cmci_reenable();
1805 cmci_recheck(); 1805 cmci_recheck();
@@ -2022,7 +2022,7 @@ static void __cpuinit mce_disable_cpu(void *h)
2022 unsigned long action = *(unsigned long *)h; 2022 unsigned long action = *(unsigned long *)h;
2023 int i; 2023 int i;
2024 2024
2025 if (!mce_available(&current_cpu_data)) 2025 if (!mce_available(__this_cpu_ptr(&cpu_info)))
2026 return; 2026 return;
2027 2027
2028 if (!(action & CPU_TASKS_FROZEN)) 2028 if (!(action & CPU_TASKS_FROZEN))
@@ -2040,7 +2040,7 @@ static void __cpuinit mce_reenable_cpu(void *h)
2040 unsigned long action = *(unsigned long *)h; 2040 unsigned long action = *(unsigned long *)h;
2041 int i; 2041 int i;
2042 2042
2043 if (!mce_available(&current_cpu_data)) 2043 if (!mce_available(__this_cpu_ptr(&cpu_info)))
2044 return; 2044 return;
2045 2045
2046 if (!(action & CPU_TASKS_FROZEN)) 2046 if (!(action & CPU_TASKS_FROZEN))
diff --git a/arch/x86/kernel/cpu/mcheck/mce_intel.c b/arch/x86/kernel/cpu/mcheck/mce_intel.c
index 6fcd0936194f..8694ef56459d 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_intel.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_intel.c
@@ -130,7 +130,7 @@ void cmci_recheck(void)
130 unsigned long flags; 130 unsigned long flags;
131 int banks; 131 int banks;
132 132
133 if (!mce_available(&current_cpu_data) || !cmci_supported(&banks)) 133 if (!mce_available(__this_cpu_ptr(&cpu_info)) || !cmci_supported(&banks))
134 return; 134 return;
135 local_irq_save(flags); 135 local_irq_save(flags);
136 machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned)); 136 machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 0a360d146596..04921017abe0 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -997,8 +997,7 @@ x86_perf_event_set_period(struct perf_event *event)
997 997
998static void x86_pmu_enable_event(struct perf_event *event) 998static void x86_pmu_enable_event(struct perf_event *event)
999{ 999{
1000 struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events); 1000 if (__this_cpu_read(cpu_hw_events.enabled))
1001 if (cpuc->enabled)
1002 __x86_pmu_enable_event(&event->hw, 1001 __x86_pmu_enable_event(&event->hw,
1003 ARCH_PERFMON_EVENTSEL_ENABLE); 1002 ARCH_PERFMON_EVENTSEL_ENABLE);
1004} 1003}
@@ -1272,7 +1271,7 @@ perf_event_nmi_handler(struct notifier_block *self,
1272 break; 1271 break;
1273 case DIE_NMIUNKNOWN: 1272 case DIE_NMIUNKNOWN:
1274 this_nmi = percpu_read(irq_stat.__nmi_count); 1273 this_nmi = percpu_read(irq_stat.__nmi_count);
1275 if (this_nmi != __get_cpu_var(pmu_nmi).marked) 1274 if (this_nmi != __this_cpu_read(pmu_nmi.marked))
1276 /* let the kernel handle the unknown nmi */ 1275 /* let the kernel handle the unknown nmi */
1277 return NOTIFY_DONE; 1276 return NOTIFY_DONE;
1278 /* 1277 /*
@@ -1296,8 +1295,8 @@ perf_event_nmi_handler(struct notifier_block *self,
1296 this_nmi = percpu_read(irq_stat.__nmi_count); 1295 this_nmi = percpu_read(irq_stat.__nmi_count);
1297 if ((handled > 1) || 1296 if ((handled > 1) ||
1298 /* the next nmi could be a back-to-back nmi */ 1297 /* the next nmi could be a back-to-back nmi */
1299 ((__get_cpu_var(pmu_nmi).marked == this_nmi) && 1298 ((__this_cpu_read(pmu_nmi.marked) == this_nmi) &&
1300 (__get_cpu_var(pmu_nmi).handled > 1))) { 1299 (__this_cpu_read(pmu_nmi.handled) > 1))) {
1301 /* 1300 /*
1302 * We could have two subsequent back-to-back nmis: The 1301 * We could have two subsequent back-to-back nmis: The
1303 * first handles more than one counter, the 2nd 1302 * first handles more than one counter, the 2nd
@@ -1308,8 +1307,8 @@ perf_event_nmi_handler(struct notifier_block *self,
1308 * handling more than one counter. We will mark the 1307 * handling more than one counter. We will mark the
1309 * next (3rd) and then drop it if unhandled. 1308 * next (3rd) and then drop it if unhandled.
1310 */ 1309 */
1311 __get_cpu_var(pmu_nmi).marked = this_nmi + 1; 1310 __this_cpu_write(pmu_nmi.marked, this_nmi + 1);
1312 __get_cpu_var(pmu_nmi).handled = handled; 1311 __this_cpu_write(pmu_nmi.handled, handled);
1313 } 1312 }
1314 1313
1315 return NOTIFY_STOP; 1314 return NOTIFY_STOP;
@@ -1484,11 +1483,9 @@ static inline void x86_pmu_read(struct perf_event *event)
1484 */ 1483 */
1485static void x86_pmu_start_txn(struct pmu *pmu) 1484static void x86_pmu_start_txn(struct pmu *pmu)
1486{ 1485{
1487 struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
1488
1489 perf_pmu_disable(pmu); 1486 perf_pmu_disable(pmu);
1490 cpuc->group_flag |= PERF_EVENT_TXN; 1487 __this_cpu_or(cpu_hw_events.group_flag, PERF_EVENT_TXN);
1491 cpuc->n_txn = 0; 1488 __this_cpu_write(cpu_hw_events.n_txn, 0);
1492} 1489}
1493 1490
1494/* 1491/*
@@ -1498,14 +1495,12 @@ static void x86_pmu_start_txn(struct pmu *pmu)
1498 */ 1495 */
1499static void x86_pmu_cancel_txn(struct pmu *pmu) 1496static void x86_pmu_cancel_txn(struct pmu *pmu)
1500{ 1497{
1501 struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events); 1498 __this_cpu_and(cpu_hw_events.group_flag, ~PERF_EVENT_TXN);
1502
1503 cpuc->group_flag &= ~PERF_EVENT_TXN;
1504 /* 1499 /*
1505 * Truncate the collected events. 1500 * Truncate the collected events.
1506 */ 1501 */
1507 cpuc->n_added -= cpuc->n_txn; 1502 __this_cpu_sub(cpu_hw_events.n_added, __this_cpu_read(cpu_hw_events.n_txn));
1508 cpuc->n_events -= cpuc->n_txn; 1503 __this_cpu_sub(cpu_hw_events.n_events, __this_cpu_read(cpu_hw_events.n_txn));
1509 perf_pmu_enable(pmu); 1504 perf_pmu_enable(pmu);
1510} 1505}
1511 1506
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 24e390e40f2e..008835c1d79c 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -649,7 +649,7 @@ static void intel_pmu_enable_event(struct perf_event *event)
649 struct hw_perf_event *hwc = &event->hw; 649 struct hw_perf_event *hwc = &event->hw;
650 650
651 if (unlikely(hwc->idx == X86_PMC_IDX_FIXED_BTS)) { 651 if (unlikely(hwc->idx == X86_PMC_IDX_FIXED_BTS)) {
652 if (!__get_cpu_var(cpu_hw_events).enabled) 652 if (!__this_cpu_read(cpu_hw_events.enabled))
653 return; 653 return;
654 654
655 intel_pmu_enable_bts(hwc->config); 655 intel_pmu_enable_bts(hwc->config);
@@ -679,7 +679,7 @@ static int intel_pmu_save_and_restart(struct perf_event *event)
679 679
680static void intel_pmu_reset(void) 680static void intel_pmu_reset(void)
681{ 681{
682 struct debug_store *ds = __get_cpu_var(cpu_hw_events).ds; 682 struct debug_store *ds = __this_cpu_read(cpu_hw_events.ds);
683 unsigned long flags; 683 unsigned long flags;
684 int idx; 684 int idx;
685 685
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 298448656b60..382eb2936d4d 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -170,9 +170,9 @@ static void ftrace_mod_code(void)
170 170
171void ftrace_nmi_enter(void) 171void ftrace_nmi_enter(void)
172{ 172{
173 __get_cpu_var(save_modifying_code) = modifying_code; 173 __this_cpu_write(save_modifying_code, modifying_code);
174 174
175 if (!__get_cpu_var(save_modifying_code)) 175 if (!__this_cpu_read(save_modifying_code))
176 return; 176 return;
177 177
178 if (atomic_inc_return(&nmi_running) & MOD_CODE_WRITE_FLAG) { 178 if (atomic_inc_return(&nmi_running) & MOD_CODE_WRITE_FLAG) {
@@ -186,7 +186,7 @@ void ftrace_nmi_enter(void)
186 186
187void ftrace_nmi_exit(void) 187void ftrace_nmi_exit(void)
188{ 188{
189 if (!__get_cpu_var(save_modifying_code)) 189 if (!__this_cpu_read(save_modifying_code))
190 return; 190 return;
191 191
192 /* Finish all executions before clearing nmi_running */ 192 /* Finish all executions before clearing nmi_running */
diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c
index 42c594254507..02f07634d265 100644
--- a/arch/x86/kernel/hw_breakpoint.c
+++ b/arch/x86/kernel/hw_breakpoint.c
@@ -122,7 +122,7 @@ int arch_install_hw_breakpoint(struct perf_event *bp)
122 return -EBUSY; 122 return -EBUSY;
123 123
124 set_debugreg(info->address, i); 124 set_debugreg(info->address, i);
125 __get_cpu_var(cpu_debugreg[i]) = info->address; 125 __this_cpu_write(cpu_debugreg[i], info->address);
126 126
127 dr7 = &__get_cpu_var(cpu_dr7); 127 dr7 = &__get_cpu_var(cpu_dr7);
128 *dr7 |= encode_dr7(i, info->len, info->type); 128 *dr7 |= encode_dr7(i, info->len, info->type);
@@ -397,12 +397,12 @@ void flush_ptrace_hw_breakpoint(struct task_struct *tsk)
397 397
398void hw_breakpoint_restore(void) 398void hw_breakpoint_restore(void)
399{ 399{
400 set_debugreg(__get_cpu_var(cpu_debugreg[0]), 0); 400 set_debugreg(__this_cpu_read(cpu_debugreg[0]), 0);
401 set_debugreg(__get_cpu_var(cpu_debugreg[1]), 1); 401 set_debugreg(__this_cpu_read(cpu_debugreg[1]), 1);
402 set_debugreg(__get_cpu_var(cpu_debugreg[2]), 2); 402 set_debugreg(__this_cpu_read(cpu_debugreg[2]), 2);
403 set_debugreg(__get_cpu_var(cpu_debugreg[3]), 3); 403 set_debugreg(__this_cpu_read(cpu_debugreg[3]), 3);
404 set_debugreg(current->thread.debugreg6, 6); 404 set_debugreg(current->thread.debugreg6, 6);
405 set_debugreg(__get_cpu_var(cpu_dr7), 7); 405 set_debugreg(__this_cpu_read(cpu_dr7), 7);
406} 406}
407EXPORT_SYMBOL_GPL(hw_breakpoint_restore); 407EXPORT_SYMBOL_GPL(hw_breakpoint_restore);
408 408
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 83ec0175f986..3a43caa3beb7 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -234,7 +234,7 @@ unsigned int __irq_entry do_IRQ(struct pt_regs *regs)
234 exit_idle(); 234 exit_idle();
235 irq_enter(); 235 irq_enter();
236 236
237 irq = __get_cpu_var(vector_irq)[vector]; 237 irq = __this_cpu_read(vector_irq[vector]);
238 238
239 if (!handle_irq(irq, regs)) { 239 if (!handle_irq(irq, regs)) {
240 ack_APIC_irq(); 240 ack_APIC_irq();
@@ -350,12 +350,12 @@ void fixup_irqs(void)
350 for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) { 350 for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) {
351 unsigned int irr; 351 unsigned int irr;
352 352
353 if (__get_cpu_var(vector_irq)[vector] < 0) 353 if (__this_cpu_read(vector_irq[vector]) < 0)
354 continue; 354 continue;
355 355
356 irr = apic_read(APIC_IRR + (vector / 32 * 0x10)); 356 irr = apic_read(APIC_IRR + (vector / 32 * 0x10));
357 if (irr & (1 << (vector % 32))) { 357 if (irr & (1 << (vector % 32))) {
358 irq = __get_cpu_var(vector_irq)[vector]; 358 irq = __this_cpu_read(vector_irq[vector]);
359 359
360 data = irq_get_irq_data(irq); 360 data = irq_get_irq_data(irq);
361 raw_spin_lock(&desc->lock); 361 raw_spin_lock(&desc->lock);
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c
index 96656f207751..48ff6dcffa02 100644
--- a/arch/x86/kernel/irq_32.c
+++ b/arch/x86/kernel/irq_32.c
@@ -79,7 +79,7 @@ execute_on_irq_stack(int overflow, struct irq_desc *desc, int irq)
79 u32 *isp, arg1, arg2; 79 u32 *isp, arg1, arg2;
80 80
81 curctx = (union irq_ctx *) current_thread_info(); 81 curctx = (union irq_ctx *) current_thread_info();
82 irqctx = __get_cpu_var(hardirq_ctx); 82 irqctx = __this_cpu_read(hardirq_ctx);
83 83
84 /* 84 /*
85 * this is where we switch to the IRQ stack. However, if we are 85 * this is where we switch to the IRQ stack. However, if we are
@@ -166,7 +166,7 @@ asmlinkage void do_softirq(void)
166 166
167 if (local_softirq_pending()) { 167 if (local_softirq_pending()) {
168 curctx = current_thread_info(); 168 curctx = current_thread_info();
169 irqctx = __get_cpu_var(softirq_ctx); 169 irqctx = __this_cpu_read(softirq_ctx);
170 irqctx->tinfo.task = curctx->task; 170 irqctx->tinfo.task = curctx->task;
171 irqctx->tinfo.previous_esp = current_stack_pointer; 171 irqctx->tinfo.previous_esp = current_stack_pointer;
172 172
diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c
index 5940282bd2f9..d91c477b3f62 100644
--- a/arch/x86/kernel/kprobes.c
+++ b/arch/x86/kernel/kprobes.c
@@ -403,7 +403,7 @@ static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb)
403 403
404static void __kprobes restore_previous_kprobe(struct kprobe_ctlblk *kcb) 404static void __kprobes restore_previous_kprobe(struct kprobe_ctlblk *kcb)
405{ 405{
406 __get_cpu_var(current_kprobe) = kcb->prev_kprobe.kp; 406 __this_cpu_write(current_kprobe, kcb->prev_kprobe.kp);
407 kcb->kprobe_status = kcb->prev_kprobe.status; 407 kcb->kprobe_status = kcb->prev_kprobe.status;
408 kcb->kprobe_old_flags = kcb->prev_kprobe.old_flags; 408 kcb->kprobe_old_flags = kcb->prev_kprobe.old_flags;
409 kcb->kprobe_saved_flags = kcb->prev_kprobe.saved_flags; 409 kcb->kprobe_saved_flags = kcb->prev_kprobe.saved_flags;
@@ -412,7 +412,7 @@ static void __kprobes restore_previous_kprobe(struct kprobe_ctlblk *kcb)
412static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs, 412static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
413 struct kprobe_ctlblk *kcb) 413 struct kprobe_ctlblk *kcb)
414{ 414{
415 __get_cpu_var(current_kprobe) = p; 415 __this_cpu_write(current_kprobe, p);
416 kcb->kprobe_saved_flags = kcb->kprobe_old_flags 416 kcb->kprobe_saved_flags = kcb->kprobe_old_flags
417 = (regs->flags & (X86_EFLAGS_TF | X86_EFLAGS_IF)); 417 = (regs->flags & (X86_EFLAGS_TF | X86_EFLAGS_IF));
418 if (is_IF_modifier(p->ainsn.insn)) 418 if (is_IF_modifier(p->ainsn.insn))
@@ -586,7 +586,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
586 preempt_enable_no_resched(); 586 preempt_enable_no_resched();
587 return 1; 587 return 1;
588 } else if (kprobe_running()) { 588 } else if (kprobe_running()) {
589 p = __get_cpu_var(current_kprobe); 589 p = __this_cpu_read(current_kprobe);
590 if (p->break_handler && p->break_handler(p, regs)) { 590 if (p->break_handler && p->break_handler(p, regs)) {
591 setup_singlestep(p, regs, kcb, 0); 591 setup_singlestep(p, regs, kcb, 0);
592 return 1; 592 return 1;
@@ -759,11 +759,11 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
759 759
760 orig_ret_address = (unsigned long)ri->ret_addr; 760 orig_ret_address = (unsigned long)ri->ret_addr;
761 if (ri->rp && ri->rp->handler) { 761 if (ri->rp && ri->rp->handler) {
762 __get_cpu_var(current_kprobe) = &ri->rp->kp; 762 __this_cpu_write(current_kprobe, &ri->rp->kp);
763 get_kprobe_ctlblk()->kprobe_status = KPROBE_HIT_ACTIVE; 763 get_kprobe_ctlblk()->kprobe_status = KPROBE_HIT_ACTIVE;
764 ri->ret_addr = correct_ret_addr; 764 ri->ret_addr = correct_ret_addr;
765 ri->rp->handler(ri, regs); 765 ri->rp->handler(ri, regs);
766 __get_cpu_var(current_kprobe) = NULL; 766 __this_cpu_write(current_kprobe, NULL);
767 } 767 }
768 768
769 recycle_rp_inst(ri, &empty_rp); 769 recycle_rp_inst(ri, &empty_rp);
@@ -1202,10 +1202,10 @@ static void __kprobes optimized_callback(struct optimized_kprobe *op,
1202 regs->ip = (unsigned long)op->kp.addr + INT3_SIZE; 1202 regs->ip = (unsigned long)op->kp.addr + INT3_SIZE;
1203 regs->orig_ax = ~0UL; 1203 regs->orig_ax = ~0UL;
1204 1204
1205 __get_cpu_var(current_kprobe) = &op->kp; 1205 __this_cpu_write(current_kprobe, &op->kp);
1206 kcb->kprobe_status = KPROBE_HIT_ACTIVE; 1206 kcb->kprobe_status = KPROBE_HIT_ACTIVE;
1207 opt_pre_handler(&op->kp, regs); 1207 opt_pre_handler(&op->kp, regs);
1208 __get_cpu_var(current_kprobe) = NULL; 1208 __this_cpu_write(current_kprobe, NULL);
1209 } 1209 }
1210 preempt_enable_no_resched(); 1210 preempt_enable_no_resched();
1211} 1211}
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index c852041bfc3d..09c08a1c706f 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -446,7 +446,7 @@ void mwait_idle_with_hints(unsigned long ax, unsigned long cx)
446 trace_power_start(POWER_CSTATE, (ax>>4)+1, smp_processor_id()); 446 trace_power_start(POWER_CSTATE, (ax>>4)+1, smp_processor_id());
447 trace_cpu_idle((ax>>4)+1, smp_processor_id()); 447 trace_cpu_idle((ax>>4)+1, smp_processor_id());
448 if (!need_resched()) { 448 if (!need_resched()) {
449 if (cpu_has(&current_cpu_data, X86_FEATURE_CLFLUSH_MONITOR)) 449 if (cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_CLFLUSH_MONITOR))
450 clflush((void *)&current_thread_info()->flags); 450 clflush((void *)&current_thread_info()->flags);
451 451
452 __monitor((void *)&current_thread_info()->flags, 0, 0); 452 __monitor((void *)&current_thread_info()->flags, 0, 0);
@@ -462,7 +462,7 @@ static void mwait_idle(void)
462 if (!need_resched()) { 462 if (!need_resched()) {
463 trace_power_start(POWER_CSTATE, 1, smp_processor_id()); 463 trace_power_start(POWER_CSTATE, 1, smp_processor_id());
464 trace_cpu_idle(1, smp_processor_id()); 464 trace_cpu_idle(1, smp_processor_id());
465 if (cpu_has(&current_cpu_data, X86_FEATURE_CLFLUSH_MONITOR)) 465 if (cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_CLFLUSH_MONITOR))
466 clflush((void *)&current_thread_info()->flags); 466 clflush((void *)&current_thread_info()->flags);
467 467
468 __monitor((void *)&current_thread_info()->flags, 0, 0); 468 __monitor((void *)&current_thread_info()->flags, 0, 0);
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index ee886fe10ef4..c7149c96d079 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -427,7 +427,7 @@ void __cpuinit set_cpu_sibling_map(int cpu)
427 427
428 cpumask_set_cpu(cpu, c->llc_shared_map); 428 cpumask_set_cpu(cpu, c->llc_shared_map);
429 429
430 if (current_cpu_data.x86_max_cores == 1) { 430 if (__this_cpu_read(cpu_info.x86_max_cores) == 1) {
431 cpumask_copy(cpu_core_mask(cpu), cpu_sibling_mask(cpu)); 431 cpumask_copy(cpu_core_mask(cpu), cpu_sibling_mask(cpu));
432 c->booted_cores = 1; 432 c->booted_cores = 1;
433 return; 433 return;
@@ -1089,7 +1089,7 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
1089 1089
1090 preempt_disable(); 1090 preempt_disable();
1091 smp_cpu_index_default(); 1091 smp_cpu_index_default();
1092 current_cpu_data = boot_cpu_data; 1092 memcpy(__this_cpu_ptr(&cpu_info), &boot_cpu_data, sizeof(cpu_info));
1093 cpumask_copy(cpu_callin_mask, cpumask_of(0)); 1093 cpumask_copy(cpu_callin_mask, cpumask_of(0));
1094 mb(); 1094 mb();
1095 /* 1095 /*
@@ -1383,7 +1383,7 @@ void play_dead_common(void)
1383 1383
1384 mb(); 1384 mb();
1385 /* Ack it */ 1385 /* Ack it */
1386 __get_cpu_var(cpu_state) = CPU_DEAD; 1386 __this_cpu_write(cpu_state, CPU_DEAD);
1387 1387
1388 /* 1388 /*
1389 * With physical CPU hotplug, we should halt the cpu 1389 * With physical CPU hotplug, we should halt the cpu
@@ -1403,11 +1403,11 @@ static inline void mwait_play_dead(void)
1403 int i; 1403 int i;
1404 void *mwait_ptr; 1404 void *mwait_ptr;
1405 1405
1406 if (!cpu_has(&current_cpu_data, X86_FEATURE_MWAIT)) 1406 if (!cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_MWAIT))
1407 return; 1407 return;
1408 if (!cpu_has(&current_cpu_data, X86_FEATURE_CLFLSH)) 1408 if (!cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_CLFLSH))
1409 return; 1409 return;
1410 if (current_cpu_data.cpuid_level < CPUID_MWAIT_LEAF) 1410 if (__this_cpu_read(cpu_info.cpuid_level) < CPUID_MWAIT_LEAF)
1411 return; 1411 return;
1412 1412
1413 eax = CPUID_MWAIT_LEAF; 1413 eax = CPUID_MWAIT_LEAF;
@@ -1458,7 +1458,7 @@ static inline void mwait_play_dead(void)
1458 1458
1459static inline void hlt_play_dead(void) 1459static inline void hlt_play_dead(void)
1460{ 1460{
1461 if (current_cpu_data.x86 >= 4) 1461 if (__this_cpu_read(cpu_info.x86) >= 4)
1462 wbinvd(); 1462 wbinvd();
1463 1463
1464 while (1) { 1464 while (1) {
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 356a0d455cf9..03d2ea82f35a 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -659,7 +659,7 @@ void restore_sched_clock_state(void)
659 659
660 local_irq_save(flags); 660 local_irq_save(flags);
661 661
662 __get_cpu_var(cyc2ns_offset) = 0; 662 __this_cpu_write(cyc2ns_offset, 0);
663 offset = cyc2ns_suspend - sched_clock(); 663 offset = cyc2ns_suspend - sched_clock();
664 664
665 for_each_possible_cpu(cpu) 665 for_each_possible_cpu(cpu)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b989e1f1e5d3..46a368cb651e 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -976,7 +976,7 @@ static inline u64 nsec_to_cycles(u64 nsec)
976 if (kvm_tsc_changes_freq()) 976 if (kvm_tsc_changes_freq())
977 printk_once(KERN_WARNING 977 printk_once(KERN_WARNING
978 "kvm: unreliable cycle conversion on adjustable rate TSC\n"); 978 "kvm: unreliable cycle conversion on adjustable rate TSC\n");
979 ret = nsec * __get_cpu_var(cpu_tsc_khz); 979 ret = nsec * __this_cpu_read(cpu_tsc_khz);
980 do_div(ret, USEC_PER_SEC); 980 do_div(ret, USEC_PER_SEC);
981 return ret; 981 return ret;
982} 982}
@@ -1061,7 +1061,7 @@ static int kvm_guest_time_update(struct kvm_vcpu *v)
1061 local_irq_save(flags); 1061 local_irq_save(flags);
1062 kvm_get_msr(v, MSR_IA32_TSC, &tsc_timestamp); 1062 kvm_get_msr(v, MSR_IA32_TSC, &tsc_timestamp);
1063 kernel_ns = get_kernel_ns(); 1063 kernel_ns = get_kernel_ns();
1064 this_tsc_khz = __get_cpu_var(cpu_tsc_khz); 1064 this_tsc_khz = __this_cpu_read(cpu_tsc_khz);
1065 1065
1066 if (unlikely(this_tsc_khz == 0)) { 1066 if (unlikely(this_tsc_khz == 0)) {
1067 local_irq_restore(flags); 1067 local_irq_restore(flags);
@@ -4427,7 +4427,7 @@ EXPORT_SYMBOL_GPL(kvm_fast_pio_out);
4427 4427
4428static void tsc_bad(void *info) 4428static void tsc_bad(void *info)
4429{ 4429{
4430 __get_cpu_var(cpu_tsc_khz) = 0; 4430 __this_cpu_write(cpu_tsc_khz, 0);
4431} 4431}
4432 4432
4433static void tsc_khz_changed(void *data) 4433static void tsc_khz_changed(void *data)
@@ -4441,7 +4441,7 @@ static void tsc_khz_changed(void *data)
4441 khz = cpufreq_quick_get(raw_smp_processor_id()); 4441 khz = cpufreq_quick_get(raw_smp_processor_id());
4442 if (!khz) 4442 if (!khz)
4443 khz = tsc_khz; 4443 khz = tsc_khz;
4444 __get_cpu_var(cpu_tsc_khz) = khz; 4444 __this_cpu_write(cpu_tsc_khz, khz);
4445} 4445}
4446 4446
4447static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, 4447static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
diff --git a/arch/x86/lib/delay.c b/arch/x86/lib/delay.c
index ff485d361182..fc45ba887d05 100644
--- a/arch/x86/lib/delay.c
+++ b/arch/x86/lib/delay.c
@@ -121,7 +121,7 @@ inline void __const_udelay(unsigned long xloops)
121 asm("mull %%edx" 121 asm("mull %%edx"
122 :"=d" (xloops), "=&a" (d0) 122 :"=d" (xloops), "=&a" (d0)
123 :"1" (xloops), "0" 123 :"1" (xloops), "0"
124 (cpu_data(raw_smp_processor_id()).loops_per_jiffy * (HZ/4))); 124 (this_cpu_read(cpu_info.loops_per_jiffy) * (HZ/4)));
125 125
126 __delay(++xloops); 126 __delay(++xloops);
127} 127}
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index 358c8b9c96a7..f24a8533bcdf 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -143,7 +143,7 @@ static inline int has_mux(void)
143 143
144inline int op_x86_phys_to_virt(int phys) 144inline int op_x86_phys_to_virt(int phys)
145{ 145{
146 return __get_cpu_var(switch_index) + phys; 146 return __this_cpu_read(switch_index) + phys;
147} 147}
148 148
149inline int op_x86_virt_to_phys(int virt) 149inline int op_x86_virt_to_phys(int virt)
diff --git a/arch/x86/oprofile/op_model_ppro.c b/arch/x86/oprofile/op_model_ppro.c
index d769cda54082..94b745045e45 100644
--- a/arch/x86/oprofile/op_model_ppro.c
+++ b/arch/x86/oprofile/op_model_ppro.c
@@ -95,8 +95,8 @@ static void ppro_setup_ctrs(struct op_x86_model_spec const *model,
95 * counter width: 95 * counter width:
96 */ 96 */
97 if (!(eax.split.version_id == 0 && 97 if (!(eax.split.version_id == 0 &&
98 current_cpu_data.x86 == 6 && 98 __this_cpu_read(cpu_info.x86) == 6 &&
99 current_cpu_data.x86_model == 15)) { 99 __this_cpu_read(cpu_info.x86_model) == 15)) {
100 100
101 if (counter_width < eax.split.bit_width) 101 if (counter_width < eax.split.bit_width)
102 counter_width = eax.split.bit_width; 102 counter_width = eax.split.bit_width;
@@ -235,8 +235,8 @@ static void arch_perfmon_setup_counters(void)
235 eax.full = cpuid_eax(0xa); 235 eax.full = cpuid_eax(0xa);
236 236
237 /* Workaround for BIOS bugs in 6/15. Taken from perfmon2 */ 237 /* Workaround for BIOS bugs in 6/15. Taken from perfmon2 */
238 if (eax.split.version_id == 0 && current_cpu_data.x86 == 6 && 238 if (eax.split.version_id == 0 && __this_cpu_read(cpu_info.x86) == 6 &&
239 current_cpu_data.x86_model == 15) { 239 __this_cpu_read(cpu_info.x86_model) == 15) {
240 eax.split.version_id = 2; 240 eax.split.version_id = 2;
241 eax.split.num_counters = 2; 241 eax.split.num_counters = 2;
242 eax.split.bit_width = 40; 242 eax.split.bit_width = 40;
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 44dcad43989d..aa8c89ae54cf 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -574,8 +574,8 @@ static void xen_write_idt_entry(gate_desc *dt, int entrynum, const gate_desc *g)
574 574
575 preempt_disable(); 575 preempt_disable();
576 576
577 start = __get_cpu_var(idt_desc).address; 577 start = __this_cpu_read(idt_desc.address);
578 end = start + __get_cpu_var(idt_desc).size + 1; 578 end = start + __this_cpu_read(idt_desc.size) + 1;
579 579
580 xen_mc_flush(); 580 xen_mc_flush();
581 581
diff --git a/arch/x86/xen/multicalls.h b/arch/x86/xen/multicalls.h
index 9e565da5d1f7..4ec8035e3216 100644
--- a/arch/x86/xen/multicalls.h
+++ b/arch/x86/xen/multicalls.h
@@ -22,7 +22,7 @@ static inline void xen_mc_batch(void)
22 unsigned long flags; 22 unsigned long flags;
23 /* need to disable interrupts until this entry is complete */ 23 /* need to disable interrupts until this entry is complete */
24 local_irq_save(flags); 24 local_irq_save(flags);
25 __get_cpu_var(xen_mc_irq_flags) = flags; 25 __this_cpu_write(xen_mc_irq_flags, flags);
26} 26}
27 27
28static inline struct multicall_space xen_mc_entry(size_t args) 28static inline struct multicall_space xen_mc_entry(size_t args)
diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c
index 23e061b9327b..cc9b1e182fcf 100644
--- a/arch/x86/xen/spinlock.c
+++ b/arch/x86/xen/spinlock.c
@@ -159,8 +159,8 @@ static inline struct xen_spinlock *spinning_lock(struct xen_spinlock *xl)
159{ 159{
160 struct xen_spinlock *prev; 160 struct xen_spinlock *prev;
161 161
162 prev = __get_cpu_var(lock_spinners); 162 prev = __this_cpu_read(lock_spinners);
163 __get_cpu_var(lock_spinners) = xl; 163 __this_cpu_write(lock_spinners, xl);
164 164
165 wmb(); /* set lock of interest before count */ 165 wmb(); /* set lock of interest before count */
166 166
@@ -179,14 +179,14 @@ static inline void unspinning_lock(struct xen_spinlock *xl, struct xen_spinlock
179 asm(LOCK_PREFIX " decw %0" 179 asm(LOCK_PREFIX " decw %0"
180 : "+m" (xl->spinners) : : "memory"); 180 : "+m" (xl->spinners) : : "memory");
181 wmb(); /* decrement count before restoring lock */ 181 wmb(); /* decrement count before restoring lock */
182 __get_cpu_var(lock_spinners) = prev; 182 __this_cpu_write(lock_spinners, prev);
183} 183}
184 184
185static noinline int xen_spin_lock_slow(struct arch_spinlock *lock, bool irq_enable) 185static noinline int xen_spin_lock_slow(struct arch_spinlock *lock, bool irq_enable)
186{ 186{
187 struct xen_spinlock *xl = (struct xen_spinlock *)lock; 187 struct xen_spinlock *xl = (struct xen_spinlock *)lock;
188 struct xen_spinlock *prev; 188 struct xen_spinlock *prev;
189 int irq = __get_cpu_var(lock_kicker_irq); 189 int irq = __this_cpu_read(lock_kicker_irq);
190 int ret; 190 int ret;
191 u64 start; 191 u64 start;
192 192
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index 5da5e53fb94c..067759e3d6a5 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -135,24 +135,24 @@ static void do_stolen_accounting(void)
135 135
136 /* Add the appropriate number of ticks of stolen time, 136 /* Add the appropriate number of ticks of stolen time,
137 including any left-overs from last time. */ 137 including any left-overs from last time. */
138 stolen = runnable + offline + __get_cpu_var(xen_residual_stolen); 138 stolen = runnable + offline + __this_cpu_read(xen_residual_stolen);
139 139
140 if (stolen < 0) 140 if (stolen < 0)
141 stolen = 0; 141 stolen = 0;
142 142
143 ticks = iter_div_u64_rem(stolen, NS_PER_TICK, &stolen); 143 ticks = iter_div_u64_rem(stolen, NS_PER_TICK, &stolen);
144 __get_cpu_var(xen_residual_stolen) = stolen; 144 __this_cpu_write(xen_residual_stolen, stolen);
145 account_steal_ticks(ticks); 145 account_steal_ticks(ticks);
146 146
147 /* Add the appropriate number of ticks of blocked time, 147 /* Add the appropriate number of ticks of blocked time,
148 including any left-overs from last time. */ 148 including any left-overs from last time. */
149 blocked += __get_cpu_var(xen_residual_blocked); 149 blocked += __this_cpu_read(xen_residual_blocked);
150 150
151 if (blocked < 0) 151 if (blocked < 0)
152 blocked = 0; 152 blocked = 0;
153 153
154 ticks = iter_div_u64_rem(blocked, NS_PER_TICK, &blocked); 154 ticks = iter_div_u64_rem(blocked, NS_PER_TICK, &blocked);
155 __get_cpu_var(xen_residual_blocked) = blocked; 155 __this_cpu_write(xen_residual_blocked, blocked);
156 account_idle_ticks(ticks); 156 account_idle_ticks(ticks);
157} 157}
158 158
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index dcb38f8ddfda..a765b823aa9e 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -746,7 +746,7 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
746 struct acpi_processor *pr; 746 struct acpi_processor *pr;
747 struct acpi_processor_cx *cx = cpuidle_get_statedata(state); 747 struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
748 748
749 pr = __get_cpu_var(processors); 749 pr = __this_cpu_read(processors);
750 750
751 if (unlikely(!pr)) 751 if (unlikely(!pr))
752 return 0; 752 return 0;
@@ -787,7 +787,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
787 s64 idle_time_ns; 787 s64 idle_time_ns;
788 s64 idle_time; 788 s64 idle_time;
789 789
790 pr = __get_cpu_var(processors); 790 pr = __this_cpu_read(processors);
791 791
792 if (unlikely(!pr)) 792 if (unlikely(!pr))
793 return 0; 793 return 0;
@@ -864,7 +864,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
864 s64 idle_time; 864 s64 idle_time;
865 865
866 866
867 pr = __get_cpu_var(processors); 867 pr = __this_cpu_read(processors);
868 868
869 if (unlikely(!pr)) 869 if (unlikely(!pr))
870 return 0; 870 return 0;
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 5a1aa64f4e76..72a4fcb17745 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -626,7 +626,7 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num)
626 preempt_disable(); 626 preempt_disable();
627 /* if over the trickle threshold, use only 1 in 4096 samples */ 627 /* if over the trickle threshold, use only 1 in 4096 samples */
628 if (input_pool.entropy_count > trickle_thresh && 628 if (input_pool.entropy_count > trickle_thresh &&
629 (__get_cpu_var(trickle_count)++ & 0xfff)) 629 ((__this_cpu_inc_return(trickle_count) - 1) & 0xfff))
630 goto out; 630 goto out;
631 631
632 sample.jiffies = jiffies; 632 sample.jiffies = jiffies;
diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c
index a7f046b0096c..2b46a7efa0ac 100644
--- a/drivers/connector/cn_proc.c
+++ b/drivers/connector/cn_proc.c
@@ -43,9 +43,10 @@ static DEFINE_PER_CPU(__u32, proc_event_counts) = { 0 };
43 43
44static inline void get_seq(__u32 *ts, int *cpu) 44static inline void get_seq(__u32 *ts, int *cpu)
45{ 45{
46 *ts = get_cpu_var(proc_event_counts)++; 46 preempt_disable();
47 *ts = __this_cpu_inc_return(proc_event_counts) -1;
47 *cpu = smp_processor_id(); 48 *cpu = smp_processor_id();
48 put_cpu_var(proc_event_counts); 49 preempt_enable();
49} 50}
50 51
51void proc_fork_connector(struct task_struct *task) 52void proc_fork_connector(struct task_struct *task)
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 08d5f05378d9..386888f10df0 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -49,7 +49,7 @@ static int __cpuidle_register_device(struct cpuidle_device *dev);
49 */ 49 */
50static void cpuidle_idle_call(void) 50static void cpuidle_idle_call(void)
51{ 51{
52 struct cpuidle_device *dev = __get_cpu_var(cpuidle_devices); 52 struct cpuidle_device *dev = __this_cpu_read(cpuidle_devices);
53 struct cpuidle_state *target_state; 53 struct cpuidle_state *target_state;
54 int next_state; 54 int next_state;
55 55
diff --git a/drivers/input/gameport/gameport.c b/drivers/input/gameport/gameport.c
index dbf741c95835..23cf8fc933ec 100644
--- a/drivers/input/gameport/gameport.c
+++ b/drivers/input/gameport/gameport.c
@@ -121,7 +121,7 @@ static int gameport_measure_speed(struct gameport *gameport)
121 } 121 }
122 122
123 gameport_close(gameport); 123 gameport_close(gameport);
124 return (cpu_data(raw_smp_processor_id()).loops_per_jiffy * 124 return (this_cpu_read(cpu_info.loops_per_jiffy) *
125 (unsigned long)HZ / (1000 / 50)) / (tx < 1 ? 1 : tx); 125 (unsigned long)HZ / (1000 / 50)) / (tx < 1 ? 1 : tx);
126 126
127#else 127#else
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index f4e6cf3aceb8..430f875006f2 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -619,7 +619,7 @@ void __irq_entry do_IRQ(struct pt_regs *regs)
619 s390_idle_check(regs, S390_lowcore.int_clock, 619 s390_idle_check(regs, S390_lowcore.int_clock,
620 S390_lowcore.async_enter_timer); 620 S390_lowcore.async_enter_timer);
621 irq_enter(); 621 irq_enter();
622 __get_cpu_var(s390_idle).nohz_delay = 1; 622 __this_cpu_write(s390_idle.nohz_delay, 1);
623 if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator) 623 if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
624 /* Serve timer interrupts first. */ 624 /* Serve timer interrupts first. */
625 clock_comparator_work(); 625 clock_comparator_work();
diff --git a/drivers/staging/lirc/lirc_serial.c b/drivers/staging/lirc/lirc_serial.c
index 971844bbee28..9bcf149c4260 100644
--- a/drivers/staging/lirc/lirc_serial.c
+++ b/drivers/staging/lirc/lirc_serial.c
@@ -377,7 +377,7 @@ static int init_timing_params(unsigned int new_duty_cycle,
377 duty_cycle = new_duty_cycle; 377 duty_cycle = new_duty_cycle;
378 freq = new_freq; 378 freq = new_freq;
379 379
380 loops_per_sec = current_cpu_data.loops_per_jiffy; 380 loops_per_sec = __this_cpu_read(cpu.info.loops_per_jiffy);
381 loops_per_sec *= HZ; 381 loops_per_sec *= HZ;
382 382
383 /* How many clocks in a microsecond?, avoiding long long divide */ 383 /* How many clocks in a microsecond?, avoiding long long divide */
@@ -398,7 +398,7 @@ static int init_timing_params(unsigned int new_duty_cycle,
398 dprintk("in init_timing_params, freq=%d, duty_cycle=%d, " 398 dprintk("in init_timing_params, freq=%d, duty_cycle=%d, "
399 "clk/jiffy=%ld, pulse=%ld, space=%ld, " 399 "clk/jiffy=%ld, pulse=%ld, space=%ld, "
400 "conv_us_to_clocks=%ld\n", 400 "conv_us_to_clocks=%ld\n",
401 freq, duty_cycle, current_cpu_data.loops_per_jiffy, 401 freq, duty_cycle, __this_cpu_read(cpu_info.loops_per_jiffy),
402 pulse_width, space_width, conv_us_to_clocks); 402 pulse_width, space_width, conv_us_to_clocks);
403 return 0; 403 return 0;
404} 404}
diff --git a/drivers/staging/speakup/fakekey.c b/drivers/staging/speakup/fakekey.c
index 65b231178f05..1b34a8771641 100644
--- a/drivers/staging/speakup/fakekey.c
+++ b/drivers/staging/speakup/fakekey.c
@@ -78,10 +78,10 @@ void speakup_fake_down_arrow(void)
78 /* don't change CPU */ 78 /* don't change CPU */
79 preempt_disable(); 79 preempt_disable();
80 80
81 __get_cpu_var(reporting_keystroke) = true; 81 __this_cpu_write(reporting_keystroke, true);
82 input_report_key(virt_keyboard, KEY_DOWN, PRESSED); 82 input_report_key(virt_keyboard, KEY_DOWN, PRESSED);
83 input_report_key(virt_keyboard, KEY_DOWN, RELEASED); 83 input_report_key(virt_keyboard, KEY_DOWN, RELEASED);
84 __get_cpu_var(reporting_keystroke) = false; 84 __this_cpu_write(reporting_keystroke, false);
85 85
86 /* reenable preemption */ 86 /* reenable preemption */
87 preempt_enable(); 87 preempt_enable();
@@ -95,10 +95,5 @@ void speakup_fake_down_arrow(void)
95 */ 95 */
96bool speakup_fake_key_pressed(void) 96bool speakup_fake_key_pressed(void)
97{ 97{
98 bool is_pressed; 98 return this_cpu_read(reporting_keystroke);
99
100 is_pressed = get_cpu_var(reporting_keystroke);
101 put_cpu_var(reporting_keystroke);
102
103 return is_pressed;
104} 99}
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 31af0ac31a98..65f8637d13cf 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -355,7 +355,7 @@ static void unmask_evtchn(int port)
355 struct evtchn_unmask unmask = { .port = port }; 355 struct evtchn_unmask unmask = { .port = port };
356 (void)HYPERVISOR_event_channel_op(EVTCHNOP_unmask, &unmask); 356 (void)HYPERVISOR_event_channel_op(EVTCHNOP_unmask, &unmask);
357 } else { 357 } else {
358 struct vcpu_info *vcpu_info = __get_cpu_var(xen_vcpu); 358 struct vcpu_info *vcpu_info = __this_cpu_read(xen_vcpu);
359 359
360 sync_clear_bit(port, &s->evtchn_mask[0]); 360 sync_clear_bit(port, &s->evtchn_mask[0]);
361 361
@@ -1101,7 +1101,7 @@ static void __xen_evtchn_do_upcall(void)
1101{ 1101{
1102 int cpu = get_cpu(); 1102 int cpu = get_cpu();
1103 struct shared_info *s = HYPERVISOR_shared_info; 1103 struct shared_info *s = HYPERVISOR_shared_info;
1104 struct vcpu_info *vcpu_info = __get_cpu_var(xen_vcpu); 1104 struct vcpu_info *vcpu_info = __this_cpu_read(xen_vcpu);
1105 unsigned count; 1105 unsigned count;
1106 1106
1107 do { 1107 do {
@@ -1109,7 +1109,7 @@ static void __xen_evtchn_do_upcall(void)
1109 1109
1110 vcpu_info->evtchn_upcall_pending = 0; 1110 vcpu_info->evtchn_upcall_pending = 0;
1111 1111
1112 if (__get_cpu_var(xed_nesting_count)++) 1112 if (__this_cpu_inc_return(xed_nesting_count) - 1)
1113 goto out; 1113 goto out;
1114 1114
1115#ifndef CONFIG_X86 /* No need for a barrier -- XCHG is a barrier on x86. */ 1115#ifndef CONFIG_X86 /* No need for a barrier -- XCHG is a barrier on x86. */
@@ -1141,8 +1141,8 @@ static void __xen_evtchn_do_upcall(void)
1141 1141
1142 BUG_ON(!irqs_disabled()); 1142 BUG_ON(!irqs_disabled());
1143 1143
1144 count = __get_cpu_var(xed_nesting_count); 1144 count = __this_cpu_read(xed_nesting_count);
1145 __get_cpu_var(xed_nesting_count) = 0; 1145 __this_cpu_write(xed_nesting_count, 0);
1146 } while (count != 1 || vcpu_info->evtchn_upcall_pending); 1146 } while (count != 1 || vcpu_info->evtchn_upcall_pending);
1147 1147
1148out: 1148out:
diff --git a/fs/buffer.c b/fs/buffer.c
index 5930e382959b..2219a76e2caf 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1270,12 +1270,10 @@ static inline void check_irqs_on(void)
1270static void bh_lru_install(struct buffer_head *bh) 1270static void bh_lru_install(struct buffer_head *bh)
1271{ 1271{
1272 struct buffer_head *evictee = NULL; 1272 struct buffer_head *evictee = NULL;
1273 struct bh_lru *lru;
1274 1273
1275 check_irqs_on(); 1274 check_irqs_on();
1276 bh_lru_lock(); 1275 bh_lru_lock();
1277 lru = &__get_cpu_var(bh_lrus); 1276 if (__this_cpu_read(bh_lrus.bhs[0]) != bh) {
1278 if (lru->bhs[0] != bh) {
1279 struct buffer_head *bhs[BH_LRU_SIZE]; 1277 struct buffer_head *bhs[BH_LRU_SIZE];
1280 int in; 1278 int in;
1281 int out = 0; 1279 int out = 0;
@@ -1283,7 +1281,8 @@ static void bh_lru_install(struct buffer_head *bh)
1283 get_bh(bh); 1281 get_bh(bh);
1284 bhs[out++] = bh; 1282 bhs[out++] = bh;
1285 for (in = 0; in < BH_LRU_SIZE; in++) { 1283 for (in = 0; in < BH_LRU_SIZE; in++) {
1286 struct buffer_head *bh2 = lru->bhs[in]; 1284 struct buffer_head *bh2 =
1285 __this_cpu_read(bh_lrus.bhs[in]);
1287 1286
1288 if (bh2 == bh) { 1287 if (bh2 == bh) {
1289 __brelse(bh2); 1288 __brelse(bh2);
@@ -1298,7 +1297,7 @@ static void bh_lru_install(struct buffer_head *bh)
1298 } 1297 }
1299 while (out < BH_LRU_SIZE) 1298 while (out < BH_LRU_SIZE)
1300 bhs[out++] = NULL; 1299 bhs[out++] = NULL;
1301 memcpy(lru->bhs, bhs, sizeof(bhs)); 1300 memcpy(__this_cpu_ptr(&bh_lrus.bhs), bhs, sizeof(bhs));
1302 } 1301 }
1303 bh_lru_unlock(); 1302 bh_lru_unlock();
1304 1303
@@ -1313,23 +1312,22 @@ static struct buffer_head *
1313lookup_bh_lru(struct block_device *bdev, sector_t block, unsigned size) 1312lookup_bh_lru(struct block_device *bdev, sector_t block, unsigned size)
1314{ 1313{
1315 struct buffer_head *ret = NULL; 1314 struct buffer_head *ret = NULL;
1316 struct bh_lru *lru;
1317 unsigned int i; 1315 unsigned int i;
1318 1316
1319 check_irqs_on(); 1317 check_irqs_on();
1320 bh_lru_lock(); 1318 bh_lru_lock();
1321 lru = &__get_cpu_var(bh_lrus);
1322 for (i = 0; i < BH_LRU_SIZE; i++) { 1319 for (i = 0; i < BH_LRU_SIZE; i++) {
1323 struct buffer_head *bh = lru->bhs[i]; 1320 struct buffer_head *bh = __this_cpu_read(bh_lrus.bhs[i]);
1324 1321
1325 if (bh && bh->b_bdev == bdev && 1322 if (bh && bh->b_bdev == bdev &&
1326 bh->b_blocknr == block && bh->b_size == size) { 1323 bh->b_blocknr == block && bh->b_size == size) {
1327 if (i) { 1324 if (i) {
1328 while (i) { 1325 while (i) {
1329 lru->bhs[i] = lru->bhs[i - 1]; 1326 __this_cpu_write(bh_lrus.bhs[i],
1327 __this_cpu_read(bh_lrus.bhs[i - 1]));
1330 i--; 1328 i--;
1331 } 1329 }
1332 lru->bhs[0] = bh; 1330 __this_cpu_write(bh_lrus.bhs[0], bh);
1333 } 1331 }
1334 get_bh(bh); 1332 get_bh(bh);
1335 ret = bh; 1333 ret = bh;
@@ -3203,22 +3201,23 @@ static void recalc_bh_state(void)
3203 int i; 3201 int i;
3204 int tot = 0; 3202 int tot = 0;
3205 3203
3206 if (__get_cpu_var(bh_accounting).ratelimit++ < 4096) 3204 if (__this_cpu_inc_return(bh_accounting.ratelimit) - 1 < 4096)
3207 return; 3205 return;
3208 __get_cpu_var(bh_accounting).ratelimit = 0; 3206 __this_cpu_write(bh_accounting.ratelimit, 0);
3209 for_each_online_cpu(i) 3207 for_each_online_cpu(i)
3210 tot += per_cpu(bh_accounting, i).nr; 3208 tot += per_cpu(bh_accounting, i).nr;
3211 buffer_heads_over_limit = (tot > max_buffer_heads); 3209 buffer_heads_over_limit = (tot > max_buffer_heads);
3212} 3210}
3213 3211
3214struct buffer_head *alloc_buffer_head(gfp_t gfp_flags) 3212struct buffer_head *alloc_buffer_head(gfp_t gfp_flags)
3215{ 3213{
3216 struct buffer_head *ret = kmem_cache_zalloc(bh_cachep, gfp_flags); 3214 struct buffer_head *ret = kmem_cache_zalloc(bh_cachep, gfp_flags);
3217 if (ret) { 3215 if (ret) {
3218 INIT_LIST_HEAD(&ret->b_assoc_buffers); 3216 INIT_LIST_HEAD(&ret->b_assoc_buffers);
3219 get_cpu_var(bh_accounting).nr++; 3217 preempt_disable();
3218 __this_cpu_inc(bh_accounting.nr);
3220 recalc_bh_state(); 3219 recalc_bh_state();
3221 put_cpu_var(bh_accounting); 3220 preempt_enable();
3222 } 3221 }
3223 return ret; 3222 return ret;
3224} 3223}
@@ -3228,9 +3227,10 @@ void free_buffer_head(struct buffer_head *bh)
3228{ 3227{
3229 BUG_ON(!list_empty(&bh->b_assoc_buffers)); 3228 BUG_ON(!list_empty(&bh->b_assoc_buffers));
3230 kmem_cache_free(bh_cachep, bh); 3229 kmem_cache_free(bh_cachep, bh);
3231 get_cpu_var(bh_accounting).nr--; 3230 preempt_disable();
3231 __this_cpu_dec(bh_accounting.nr);
3232 recalc_bh_state(); 3232 recalc_bh_state();
3233 put_cpu_var(bh_accounting); 3233 preempt_enable();
3234} 3234}
3235EXPORT_SYMBOL(free_buffer_head); 3235EXPORT_SYMBOL(free_buffer_head);
3236 3236
@@ -3243,9 +3243,8 @@ static void buffer_exit_cpu(int cpu)
3243 brelse(b->bhs[i]); 3243 brelse(b->bhs[i]);
3244 b->bhs[i] = NULL; 3244 b->bhs[i] = NULL;
3245 } 3245 }
3246 get_cpu_var(bh_accounting).nr += per_cpu(bh_accounting, cpu).nr; 3246 this_cpu_add(bh_accounting.nr, per_cpu(bh_accounting, cpu).nr);
3247 per_cpu(bh_accounting, cpu).nr = 0; 3247 per_cpu(bh_accounting, cpu).nr = 0;
3248 put_cpu_var(bh_accounting);
3249} 3248}
3250 3249
3251static int buffer_cpu_notify(struct notifier_block *self, 3250static int buffer_cpu_notify(struct notifier_block *self,
diff --git a/include/asm-generic/irq_regs.h b/include/asm-generic/irq_regs.h
index 5ae1d07d4a12..6bf9355fa7eb 100644
--- a/include/asm-generic/irq_regs.h
+++ b/include/asm-generic/irq_regs.h
@@ -22,15 +22,15 @@ DECLARE_PER_CPU(struct pt_regs *, __irq_regs);
22 22
23static inline struct pt_regs *get_irq_regs(void) 23static inline struct pt_regs *get_irq_regs(void)
24{ 24{
25 return __get_cpu_var(__irq_regs); 25 return __this_cpu_read(__irq_regs);
26} 26}
27 27
28static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs) 28static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs)
29{ 29{
30 struct pt_regs *old_regs, **pp_regs = &__get_cpu_var(__irq_regs); 30 struct pt_regs *old_regs;
31 31
32 old_regs = *pp_regs; 32 old_regs = __this_cpu_read(__irq_regs);
33 *pp_regs = new_regs; 33 __this_cpu_write(__irq_regs, new_regs);
34 return old_regs; 34 return old_regs;
35} 35}
36 36
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index 4fd978e7eb83..4d857973d2c9 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -195,15 +195,9 @@ enum {
195/* 195/*
196 * io context count accounting 196 * io context count accounting
197 */ 197 */
198#define elv_ioc_count_mod(name, __val) \ 198#define elv_ioc_count_mod(name, __val) this_cpu_add(name, __val)
199 do { \ 199#define elv_ioc_count_inc(name) this_cpu_inc(name)
200 preempt_disable(); \ 200#define elv_ioc_count_dec(name) this_cpu_dec(name)
201 __get_cpu_var(name) += (__val); \
202 preempt_enable(); \
203 } while (0)
204
205#define elv_ioc_count_inc(name) elv_ioc_count_mod(name, 1)
206#define elv_ioc_count_dec(name) elv_ioc_count_mod(name, -1)
207 201
208#define elv_ioc_count_read(name) \ 202#define elv_ioc_count_read(name) \
209({ \ 203({ \
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index b676c585574e..3a93f73a8acc 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -81,7 +81,8 @@ DECLARE_PER_CPU(int, __kmap_atomic_idx);
81 81
82static inline int kmap_atomic_idx_push(void) 82static inline int kmap_atomic_idx_push(void)
83{ 83{
84 int idx = __get_cpu_var(__kmap_atomic_idx)++; 84 int idx = __this_cpu_inc_return(__kmap_atomic_idx) - 1;
85
85#ifdef CONFIG_DEBUG_HIGHMEM 86#ifdef CONFIG_DEBUG_HIGHMEM
86 WARN_ON_ONCE(in_irq() && !irqs_disabled()); 87 WARN_ON_ONCE(in_irq() && !irqs_disabled());
87 BUG_ON(idx > KM_TYPE_NR); 88 BUG_ON(idx > KM_TYPE_NR);
@@ -91,16 +92,18 @@ static inline int kmap_atomic_idx_push(void)
91 92
92static inline int kmap_atomic_idx(void) 93static inline int kmap_atomic_idx(void)
93{ 94{
94 return __get_cpu_var(__kmap_atomic_idx) - 1; 95 return __this_cpu_read(__kmap_atomic_idx) - 1;
95} 96}
96 97
97static inline int kmap_atomic_idx_pop(void) 98static inline void kmap_atomic_idx_pop(void)
98{ 99{
99 int idx = --__get_cpu_var(__kmap_atomic_idx);
100#ifdef CONFIG_DEBUG_HIGHMEM 100#ifdef CONFIG_DEBUG_HIGHMEM
101 int idx = __this_cpu_dec_return(__kmap_atomic_idx);
102
101 BUG_ON(idx < 0); 103 BUG_ON(idx < 0);
104#else
105 __this_cpu_dec(__kmap_atomic_idx);
102#endif 106#endif
103 return idx;
104} 107}
105 108
106#endif 109#endif
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index ad54c846911b..44e83ba12b5b 100644
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -47,7 +47,7 @@ extern unsigned long long nr_context_switches(void);
47 47
48#ifndef CONFIG_GENERIC_HARDIRQS 48#ifndef CONFIG_GENERIC_HARDIRQS
49#define kstat_irqs_this_cpu(irq) \ 49#define kstat_irqs_this_cpu(irq) \
50 (kstat_this_cpu.irqs[irq]) 50 (this_cpu_read(kstat.irqs[irq])
51 51
52struct irq_desc; 52struct irq_desc;
53 53
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index b78edb58ee66..dd7c12e875bc 100644
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -305,12 +305,12 @@ struct hlist_head * kretprobe_inst_table_head(struct task_struct *tsk);
305/* kprobe_running() will just return the current_kprobe on this CPU */ 305/* kprobe_running() will just return the current_kprobe on this CPU */
306static inline struct kprobe *kprobe_running(void) 306static inline struct kprobe *kprobe_running(void)
307{ 307{
308 return (__get_cpu_var(current_kprobe)); 308 return (__this_cpu_read(current_kprobe));
309} 309}
310 310
311static inline void reset_current_kprobe(void) 311static inline void reset_current_kprobe(void)
312{ 312{
313 __get_cpu_var(current_kprobe) = NULL; 313 __this_cpu_write(current_kprobe, NULL);
314} 314}
315 315
316static inline struct kprobe_ctlblk *get_kprobe_ctlblk(void) 316static inline struct kprobe_ctlblk *get_kprobe_ctlblk(void)
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 5095b834a6fb..27c3c6fcfad3 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -240,6 +240,21 @@ extern void __bad_size_call_parameter(void);
240 pscr_ret__; \ 240 pscr_ret__; \
241}) 241})
242 242
243#define __pcpu_size_call_return2(stem, variable, ...) \
244({ \
245 typeof(variable) pscr2_ret__; \
246 __verify_pcpu_ptr(&(variable)); \
247 switch(sizeof(variable)) { \
248 case 1: pscr2_ret__ = stem##1(variable, __VA_ARGS__); break; \
249 case 2: pscr2_ret__ = stem##2(variable, __VA_ARGS__); break; \
250 case 4: pscr2_ret__ = stem##4(variable, __VA_ARGS__); break; \
251 case 8: pscr2_ret__ = stem##8(variable, __VA_ARGS__); break; \
252 default: \
253 __bad_size_call_parameter(); break; \
254 } \
255 pscr2_ret__; \
256})
257
243#define __pcpu_size_call(stem, variable, ...) \ 258#define __pcpu_size_call(stem, variable, ...) \
244do { \ 259do { \
245 __verify_pcpu_ptr(&(variable)); \ 260 __verify_pcpu_ptr(&(variable)); \
@@ -402,6 +417,89 @@ do { \
402# define this_cpu_xor(pcp, val) __pcpu_size_call(this_cpu_or_, (pcp), (val)) 417# define this_cpu_xor(pcp, val) __pcpu_size_call(this_cpu_or_, (pcp), (val))
403#endif 418#endif
404 419
420#define _this_cpu_generic_add_return(pcp, val) \
421({ \
422 typeof(pcp) ret__; \
423 preempt_disable(); \
424 __this_cpu_add(pcp, val); \
425 ret__ = __this_cpu_read(pcp); \
426 preempt_enable(); \
427 ret__; \
428})
429
430#ifndef this_cpu_add_return
431# ifndef this_cpu_add_return_1
432# define this_cpu_add_return_1(pcp, val) _this_cpu_generic_add_return(pcp, val)
433# endif
434# ifndef this_cpu_add_return_2
435# define this_cpu_add_return_2(pcp, val) _this_cpu_generic_add_return(pcp, val)
436# endif
437# ifndef this_cpu_add_return_4
438# define this_cpu_add_return_4(pcp, val) _this_cpu_generic_add_return(pcp, val)
439# endif
440# ifndef this_cpu_add_return_8
441# define this_cpu_add_return_8(pcp, val) _this_cpu_generic_add_return(pcp, val)
442# endif
443# define this_cpu_add_return(pcp, val) __pcpu_size_call_return2(this_cpu_add_return_, pcp, val)
444#endif
445
446#define this_cpu_sub_return(pcp, val) this_cpu_add_return(pcp, -(val))
447#define this_cpu_inc_return(pcp) this_cpu_add_return(pcp, 1)
448#define this_cpu_dec_return(pcp) this_cpu_add_return(pcp, -1)
449
450#define _this_cpu_generic_xchg(pcp, nval) \
451({ typeof(pcp) ret__; \
452 preempt_disable(); \
453 ret__ = __this_cpu_read(pcp); \
454 __this_cpu_write(pcp, nval); \
455 preempt_enable(); \
456 ret__; \
457})
458
459#ifndef this_cpu_xchg
460# ifndef this_cpu_xchg_1
461# define this_cpu_xchg_1(pcp, nval) _this_cpu_generic_xchg(pcp, nval)
462# endif
463# ifndef this_cpu_xchg_2
464# define this_cpu_xchg_2(pcp, nval) _this_cpu_generic_xchg(pcp, nval)
465# endif
466# ifndef this_cpu_xchg_4
467# define this_cpu_xchg_4(pcp, nval) _this_cpu_generic_xchg(pcp, nval)
468# endif
469# ifndef this_cpu_xchg_8
470# define this_cpu_xchg_8(pcp, nval) _this_cpu_generic_xchg(pcp, nval)
471# endif
472# define this_cpu_xchg(pcp, nval) \
473 __pcpu_size_call_return2(this_cpu_xchg_, (pcp), nval)
474#endif
475
476#define _this_cpu_generic_cmpxchg(pcp, oval, nval) \
477({ typeof(pcp) ret__; \
478 preempt_disable(); \
479 ret__ = __this_cpu_read(pcp); \
480 if (ret__ == (oval)) \
481 __this_cpu_write(pcp, nval); \
482 preempt_enable(); \
483 ret__; \
484})
485
486#ifndef this_cpu_cmpxchg
487# ifndef this_cpu_cmpxchg_1
488# define this_cpu_cmpxchg_1(pcp, oval, nval) _this_cpu_generic_cmpxchg(pcp, oval, nval)
489# endif
490# ifndef this_cpu_cmpxchg_2
491# define this_cpu_cmpxchg_2(pcp, oval, nval) _this_cpu_generic_cmpxchg(pcp, oval, nval)
492# endif
493# ifndef this_cpu_cmpxchg_4
494# define this_cpu_cmpxchg_4(pcp, oval, nval) _this_cpu_generic_cmpxchg(pcp, oval, nval)
495# endif
496# ifndef this_cpu_cmpxchg_8
497# define this_cpu_cmpxchg_8(pcp, oval, nval) _this_cpu_generic_cmpxchg(pcp, oval, nval)
498# endif
499# define this_cpu_cmpxchg(pcp, oval, nval) \
500 __pcpu_size_call_return2(this_cpu_cmpxchg_, pcp, oval, nval)
501#endif
502
405/* 503/*
406 * Generic percpu operations that do not require preemption handling. 504 * Generic percpu operations that do not require preemption handling.
407 * Either we do not care about races or the caller has the 505 * Either we do not care about races or the caller has the
@@ -529,11 +627,87 @@ do { \
529# define __this_cpu_xor(pcp, val) __pcpu_size_call(__this_cpu_xor_, (pcp), (val)) 627# define __this_cpu_xor(pcp, val) __pcpu_size_call(__this_cpu_xor_, (pcp), (val))
530#endif 628#endif
531 629
630#define __this_cpu_generic_add_return(pcp, val) \
631({ \
632 __this_cpu_add(pcp, val); \
633 __this_cpu_read(pcp); \
634})
635
636#ifndef __this_cpu_add_return
637# ifndef __this_cpu_add_return_1
638# define __this_cpu_add_return_1(pcp, val) __this_cpu_generic_add_return(pcp, val)
639# endif
640# ifndef __this_cpu_add_return_2
641# define __this_cpu_add_return_2(pcp, val) __this_cpu_generic_add_return(pcp, val)
642# endif
643# ifndef __this_cpu_add_return_4
644# define __this_cpu_add_return_4(pcp, val) __this_cpu_generic_add_return(pcp, val)
645# endif
646# ifndef __this_cpu_add_return_8
647# define __this_cpu_add_return_8(pcp, val) __this_cpu_generic_add_return(pcp, val)
648# endif
649# define __this_cpu_add_return(pcp, val) __pcpu_size_call_return2(this_cpu_add_return_, pcp, val)
650#endif
651
652#define __this_cpu_sub_return(pcp, val) this_cpu_add_return(pcp, -(val))
653#define __this_cpu_inc_return(pcp) this_cpu_add_return(pcp, 1)
654#define __this_cpu_dec_return(pcp) this_cpu_add_return(pcp, -1)
655
656#define __this_cpu_generic_xchg(pcp, nval) \
657({ typeof(pcp) ret__; \
658 ret__ = __this_cpu_read(pcp); \
659 __this_cpu_write(pcp, nval); \
660 ret__; \
661})
662
663#ifndef __this_cpu_xchg
664# ifndef __this_cpu_xchg_1
665# define __this_cpu_xchg_1(pcp, nval) __this_cpu_generic_xchg(pcp, nval)
666# endif
667# ifndef __this_cpu_xchg_2
668# define __this_cpu_xchg_2(pcp, nval) __this_cpu_generic_xchg(pcp, nval)
669# endif
670# ifndef __this_cpu_xchg_4
671# define __this_cpu_xchg_4(pcp, nval) __this_cpu_generic_xchg(pcp, nval)
672# endif
673# ifndef __this_cpu_xchg_8
674# define __this_cpu_xchg_8(pcp, nval) __this_cpu_generic_xchg(pcp, nval)
675# endif
676# define __this_cpu_xchg(pcp, nval) \
677 __pcpu_size_call_return2(__this_cpu_xchg_, (pcp), nval)
678#endif
679
680#define __this_cpu_generic_cmpxchg(pcp, oval, nval) \
681({ \
682 typeof(pcp) ret__; \
683 ret__ = __this_cpu_read(pcp); \
684 if (ret__ == (oval)) \
685 __this_cpu_write(pcp, nval); \
686 ret__; \
687})
688
689#ifndef __this_cpu_cmpxchg
690# ifndef __this_cpu_cmpxchg_1
691# define __this_cpu_cmpxchg_1(pcp, oval, nval) __this_cpu_generic_cmpxchg(pcp, oval, nval)
692# endif
693# ifndef __this_cpu_cmpxchg_2
694# define __this_cpu_cmpxchg_2(pcp, oval, nval) __this_cpu_generic_cmpxchg(pcp, oval, nval)
695# endif
696# ifndef __this_cpu_cmpxchg_4
697# define __this_cpu_cmpxchg_4(pcp, oval, nval) __this_cpu_generic_cmpxchg(pcp, oval, nval)
698# endif
699# ifndef __this_cpu_cmpxchg_8
700# define __this_cpu_cmpxchg_8(pcp, oval, nval) __this_cpu_generic_cmpxchg(pcp, oval, nval)
701# endif
702# define __this_cpu_cmpxchg(pcp, oval, nval) \
703 __pcpu_size_call_return2(__this_cpu_cmpxchg_, pcp, oval, nval)
704#endif
705
532/* 706/*
533 * IRQ safe versions of the per cpu RMW operations. Note that these operations 707 * IRQ safe versions of the per cpu RMW operations. Note that these operations
534 * are *not* safe against modification of the same variable from another 708 * are *not* safe against modification of the same variable from another
535 * processors (which one gets when using regular atomic operations) 709 * processors (which one gets when using regular atomic operations)
536 . They are guaranteed to be atomic vs. local interrupts and 710 * They are guaranteed to be atomic vs. local interrupts and
537 * preemption only. 711 * preemption only.
538 */ 712 */
539#define irqsafe_cpu_generic_to_op(pcp, val, op) \ 713#define irqsafe_cpu_generic_to_op(pcp, val, op) \
@@ -620,4 +794,33 @@ do { \
620# define irqsafe_cpu_xor(pcp, val) __pcpu_size_call(irqsafe_cpu_xor_, (val)) 794# define irqsafe_cpu_xor(pcp, val) __pcpu_size_call(irqsafe_cpu_xor_, (val))
621#endif 795#endif
622 796
797#define irqsafe_cpu_generic_cmpxchg(pcp, oval, nval) \
798({ \
799 typeof(pcp) ret__; \
800 unsigned long flags; \
801 local_irq_save(flags); \
802 ret__ = __this_cpu_read(pcp); \
803 if (ret__ == (oval)) \
804 __this_cpu_write(pcp, nval); \
805 local_irq_restore(flags); \
806 ret__; \
807})
808
809#ifndef irqsafe_cpu_cmpxchg
810# ifndef irqsafe_cpu_cmpxchg_1
811# define irqsafe_cpu_cmpxchg_1(pcp, oval, nval) irqsafe_cpu_generic_cmpxchg(pcp, oval, nval)
812# endif
813# ifndef irqsafe_cpu_cmpxchg_2
814# define irqsafe_cpu_cmpxchg_2(pcp, oval, nval) irqsafe_cpu_generic_cmpxchg(pcp, oval, nval)
815# endif
816# ifndef irqsafe_cpu_cmpxchg_4
817# define irqsafe_cpu_cmpxchg_4(pcp, oval, nval) irqsafe_cpu_generic_cmpxchg(pcp, oval, nval)
818# endif
819# ifndef irqsafe_cpu_cmpxchg_8
820# define irqsafe_cpu_cmpxchg_8(pcp, oval, nval) irqsafe_cpu_generic_cmpxchg(pcp, oval, nval)
821# endif
822# define irqsafe_cpu_cmpxchg(pcp, oval, nval) \
823 __pcpu_size_call_return2(irqsafe_cpu_cmpxchg_, (pcp), oval, nval)
824#endif
825
623#endif /* __LINUX_PERCPU_H */ 826#endif /* __LINUX_PERCPU_H */
diff --git a/kernel/exit.c b/kernel/exit.c
index 676149a4ac5f..89c74861a3da 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -69,7 +69,7 @@ static void __unhash_process(struct task_struct *p, bool group_dead)
69 69
70 list_del_rcu(&p->tasks); 70 list_del_rcu(&p->tasks);
71 list_del_init(&p->sibling); 71 list_del_init(&p->sibling);
72 __get_cpu_var(process_counts)--; 72 __this_cpu_dec(process_counts);
73 } 73 }
74 list_del_rcu(&p->thread_group); 74 list_del_rcu(&p->thread_group);
75} 75}
diff --git a/kernel/fork.c b/kernel/fork.c
index dc1a8bbcea7b..d9b44f20b6b0 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1285,7 +1285,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
1285 attach_pid(p, PIDTYPE_SID, task_session(current)); 1285 attach_pid(p, PIDTYPE_SID, task_session(current));
1286 list_add_tail(&p->sibling, &p->real_parent->children); 1286 list_add_tail(&p->sibling, &p->real_parent->children);
1287 list_add_tail_rcu(&p->tasks, &init_task.tasks); 1287 list_add_tail_rcu(&p->tasks, &init_task.tasks);
1288 __get_cpu_var(process_counts)++; 1288 __this_cpu_inc(process_counts);
1289 } 1289 }
1290 attach_pid(p, PIDTYPE_PID, pid); 1290 attach_pid(p, PIDTYPE_PID, pid);
1291 nr_threads++; 1291 nr_threads++;
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index f2429fc3438c..45da2b6920ab 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -497,7 +497,7 @@ static inline int hrtimer_is_hres_enabled(void)
497 */ 497 */
498static inline int hrtimer_hres_active(void) 498static inline int hrtimer_hres_active(void)
499{ 499{
500 return __get_cpu_var(hrtimer_bases).hres_active; 500 return __this_cpu_read(hrtimer_bases.hres_active);
501} 501}
502 502
503/* 503/*
diff --git a/kernel/irq_work.c b/kernel/irq_work.c
index 90f881904bb1..c58fa7da8aef 100644
--- a/kernel/irq_work.c
+++ b/kernel/irq_work.c
@@ -77,21 +77,21 @@ void __weak arch_irq_work_raise(void)
77 */ 77 */
78static void __irq_work_queue(struct irq_work *entry) 78static void __irq_work_queue(struct irq_work *entry)
79{ 79{
80 struct irq_work **head, *next; 80 struct irq_work *next;
81 81
82 head = &get_cpu_var(irq_work_list); 82 preempt_disable();
83 83
84 do { 84 do {
85 next = *head; 85 next = __this_cpu_read(irq_work_list);
86 /* Can assign non-atomic because we keep the flags set. */ 86 /* Can assign non-atomic because we keep the flags set. */
87 entry->next = next_flags(next, IRQ_WORK_FLAGS); 87 entry->next = next_flags(next, IRQ_WORK_FLAGS);
88 } while (cmpxchg(head, next, entry) != next); 88 } while (this_cpu_cmpxchg(irq_work_list, next, entry) != next);
89 89
90 /* The list was empty, raise self-interrupt to start processing. */ 90 /* The list was empty, raise self-interrupt to start processing. */
91 if (!irq_work_next(entry)) 91 if (!irq_work_next(entry))
92 arch_irq_work_raise(); 92 arch_irq_work_raise();
93 93
94 put_cpu_var(irq_work_list); 94 preempt_enable();
95} 95}
96 96
97/* 97/*
@@ -120,16 +120,16 @@ EXPORT_SYMBOL_GPL(irq_work_queue);
120 */ 120 */
121void irq_work_run(void) 121void irq_work_run(void)
122{ 122{
123 struct irq_work *list, **head; 123 struct irq_work *list;
124 124
125 head = &__get_cpu_var(irq_work_list); 125 if (this_cpu_read(irq_work_list) == NULL)
126 if (*head == NULL)
127 return; 126 return;
128 127
129 BUG_ON(!in_irq()); 128 BUG_ON(!in_irq());
130 BUG_ON(!irqs_disabled()); 129 BUG_ON(!irqs_disabled());
131 130
132 list = xchg(head, NULL); 131 list = this_cpu_xchg(irq_work_list, NULL);
132
133 while (list != NULL) { 133 while (list != NULL) {
134 struct irq_work *entry = list; 134 struct irq_work *entry = list;
135 135
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 7663e5df0e6f..77981813a1e7 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -317,12 +317,12 @@ void __kprobes free_optinsn_slot(kprobe_opcode_t * slot, int dirty)
317/* We have preemption disabled.. so it is safe to use __ versions */ 317/* We have preemption disabled.. so it is safe to use __ versions */
318static inline void set_kprobe_instance(struct kprobe *kp) 318static inline void set_kprobe_instance(struct kprobe *kp)
319{ 319{
320 __get_cpu_var(kprobe_instance) = kp; 320 __this_cpu_write(kprobe_instance, kp);
321} 321}
322 322
323static inline void reset_kprobe_instance(void) 323static inline void reset_kprobe_instance(void)
324{ 324{
325 __get_cpu_var(kprobe_instance) = NULL; 325 __this_cpu_write(kprobe_instance, NULL);
326} 326}
327 327
328/* 328/*
@@ -965,7 +965,7 @@ static void __kprobes aggr_post_handler(struct kprobe *p, struct pt_regs *regs,
965static int __kprobes aggr_fault_handler(struct kprobe *p, struct pt_regs *regs, 965static int __kprobes aggr_fault_handler(struct kprobe *p, struct pt_regs *regs,
966 int trapnr) 966 int trapnr)
967{ 967{
968 struct kprobe *cur = __get_cpu_var(kprobe_instance); 968 struct kprobe *cur = __this_cpu_read(kprobe_instance);
969 969
970 /* 970 /*
971 * if we faulted "during" the execution of a user specified 971 * if we faulted "during" the execution of a user specified
@@ -980,7 +980,7 @@ static int __kprobes aggr_fault_handler(struct kprobe *p, struct pt_regs *regs,
980 980
981static int __kprobes aggr_break_handler(struct kprobe *p, struct pt_regs *regs) 981static int __kprobes aggr_break_handler(struct kprobe *p, struct pt_regs *regs)
982{ 982{
983 struct kprobe *cur = __get_cpu_var(kprobe_instance); 983 struct kprobe *cur = __this_cpu_read(kprobe_instance);
984 int ret = 0; 984 int ret = 0;
985 985
986 if (cur && cur->break_handler) { 986 if (cur && cur->break_handler) {
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index d0ddfea6579d..dd4aea806f8e 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -364,8 +364,8 @@ void rcu_irq_exit(void)
364 WARN_ON_ONCE(rdtp->dynticks & 0x1); 364 WARN_ON_ONCE(rdtp->dynticks & 0x1);
365 365
366 /* If the interrupt queued a callback, get out of dyntick mode. */ 366 /* If the interrupt queued a callback, get out of dyntick mode. */
367 if (__get_cpu_var(rcu_sched_data).nxtlist || 367 if (__this_cpu_read(rcu_sched_data.nxtlist) ||
368 __get_cpu_var(rcu_bh_data).nxtlist) 368 __this_cpu_read(rcu_bh_data.nxtlist))
369 set_need_resched(); 369 set_need_resched();
370} 370}
371 371
diff --git a/kernel/softirq.c b/kernel/softirq.c
index c10150cb456b..0823778f87fc 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -70,7 +70,7 @@ char *softirq_to_name[NR_SOFTIRQS] = {
70static void wakeup_softirqd(void) 70static void wakeup_softirqd(void)
71{ 71{
72 /* Interrupts are disabled: no need to stop preemption */ 72 /* Interrupts are disabled: no need to stop preemption */
73 struct task_struct *tsk = __get_cpu_var(ksoftirqd); 73 struct task_struct *tsk = __this_cpu_read(ksoftirqd);
74 74
75 if (tsk && tsk->state != TASK_RUNNING) 75 if (tsk && tsk->state != TASK_RUNNING)
76 wake_up_process(tsk); 76 wake_up_process(tsk);
@@ -388,8 +388,8 @@ void __tasklet_schedule(struct tasklet_struct *t)
388 388
389 local_irq_save(flags); 389 local_irq_save(flags);
390 t->next = NULL; 390 t->next = NULL;
391 *__get_cpu_var(tasklet_vec).tail = t; 391 *__this_cpu_read(tasklet_vec.tail) = t;
392 __get_cpu_var(tasklet_vec).tail = &(t->next); 392 __this_cpu_write(tasklet_vec.tail, &(t->next));
393 raise_softirq_irqoff(TASKLET_SOFTIRQ); 393 raise_softirq_irqoff(TASKLET_SOFTIRQ);
394 local_irq_restore(flags); 394 local_irq_restore(flags);
395} 395}
@@ -402,8 +402,8 @@ void __tasklet_hi_schedule(struct tasklet_struct *t)
402 402
403 local_irq_save(flags); 403 local_irq_save(flags);
404 t->next = NULL; 404 t->next = NULL;
405 *__get_cpu_var(tasklet_hi_vec).tail = t; 405 *__this_cpu_read(tasklet_hi_vec.tail) = t;
406 __get_cpu_var(tasklet_hi_vec).tail = &(t->next); 406 __this_cpu_write(tasklet_hi_vec.tail, &(t->next));
407 raise_softirq_irqoff(HI_SOFTIRQ); 407 raise_softirq_irqoff(HI_SOFTIRQ);
408 local_irq_restore(flags); 408 local_irq_restore(flags);
409} 409}
@@ -414,8 +414,8 @@ void __tasklet_hi_schedule_first(struct tasklet_struct *t)
414{ 414{
415 BUG_ON(!irqs_disabled()); 415 BUG_ON(!irqs_disabled());
416 416
417 t->next = __get_cpu_var(tasklet_hi_vec).head; 417 t->next = __this_cpu_read(tasklet_hi_vec.head);
418 __get_cpu_var(tasklet_hi_vec).head = t; 418 __this_cpu_write(tasklet_hi_vec.head, t);
419 __raise_softirq_irqoff(HI_SOFTIRQ); 419 __raise_softirq_irqoff(HI_SOFTIRQ);
420} 420}
421 421
@@ -426,9 +426,9 @@ static void tasklet_action(struct softirq_action *a)
426 struct tasklet_struct *list; 426 struct tasklet_struct *list;
427 427
428 local_irq_disable(); 428 local_irq_disable();
429 list = __get_cpu_var(tasklet_vec).head; 429 list = __this_cpu_read(tasklet_vec.head);
430 __get_cpu_var(tasklet_vec).head = NULL; 430 __this_cpu_write(tasklet_vec.head, NULL);
431 __get_cpu_var(tasklet_vec).tail = &__get_cpu_var(tasklet_vec).head; 431 __this_cpu_write(tasklet_vec.tail, &__get_cpu_var(tasklet_vec).head);
432 local_irq_enable(); 432 local_irq_enable();
433 433
434 while (list) { 434 while (list) {
@@ -449,8 +449,8 @@ static void tasklet_action(struct softirq_action *a)
449 449
450 local_irq_disable(); 450 local_irq_disable();
451 t->next = NULL; 451 t->next = NULL;
452 *__get_cpu_var(tasklet_vec).tail = t; 452 *__this_cpu_read(tasklet_vec.tail) = t;
453 __get_cpu_var(tasklet_vec).tail = &(t->next); 453 __this_cpu_write(tasklet_vec.tail, &(t->next));
454 __raise_softirq_irqoff(TASKLET_SOFTIRQ); 454 __raise_softirq_irqoff(TASKLET_SOFTIRQ);
455 local_irq_enable(); 455 local_irq_enable();
456 } 456 }
@@ -461,9 +461,9 @@ static void tasklet_hi_action(struct softirq_action *a)
461 struct tasklet_struct *list; 461 struct tasklet_struct *list;
462 462
463 local_irq_disable(); 463 local_irq_disable();
464 list = __get_cpu_var(tasklet_hi_vec).head; 464 list = __this_cpu_read(tasklet_hi_vec.head);
465 __get_cpu_var(tasklet_hi_vec).head = NULL; 465 __this_cpu_write(tasklet_hi_vec.head, NULL);
466 __get_cpu_var(tasklet_hi_vec).tail = &__get_cpu_var(tasklet_hi_vec).head; 466 __this_cpu_write(tasklet_hi_vec.tail, &__get_cpu_var(tasklet_hi_vec).head);
467 local_irq_enable(); 467 local_irq_enable();
468 468
469 while (list) { 469 while (list) {
@@ -484,8 +484,8 @@ static void tasklet_hi_action(struct softirq_action *a)
484 484
485 local_irq_disable(); 485 local_irq_disable();
486 t->next = NULL; 486 t->next = NULL;
487 *__get_cpu_var(tasklet_hi_vec).tail = t; 487 *__this_cpu_read(tasklet_hi_vec.tail) = t;
488 __get_cpu_var(tasklet_hi_vec).tail = &(t->next); 488 __this_cpu_write(tasklet_hi_vec.tail, &(t->next));
489 __raise_softirq_irqoff(HI_SOFTIRQ); 489 __raise_softirq_irqoff(HI_SOFTIRQ);
490 local_irq_enable(); 490 local_irq_enable();
491 } 491 }
@@ -802,16 +802,16 @@ static void takeover_tasklets(unsigned int cpu)
802 802
803 /* Find end, append list for that CPU. */ 803 /* Find end, append list for that CPU. */
804 if (&per_cpu(tasklet_vec, cpu).head != per_cpu(tasklet_vec, cpu).tail) { 804 if (&per_cpu(tasklet_vec, cpu).head != per_cpu(tasklet_vec, cpu).tail) {
805 *(__get_cpu_var(tasklet_vec).tail) = per_cpu(tasklet_vec, cpu).head; 805 *__this_cpu_read(tasklet_vec.tail) = per_cpu(tasklet_vec, cpu).head;
806 __get_cpu_var(tasklet_vec).tail = per_cpu(tasklet_vec, cpu).tail; 806 this_cpu_write(tasklet_vec.tail, per_cpu(tasklet_vec, cpu).tail);
807 per_cpu(tasklet_vec, cpu).head = NULL; 807 per_cpu(tasklet_vec, cpu).head = NULL;
808 per_cpu(tasklet_vec, cpu).tail = &per_cpu(tasklet_vec, cpu).head; 808 per_cpu(tasklet_vec, cpu).tail = &per_cpu(tasklet_vec, cpu).head;
809 } 809 }
810 raise_softirq_irqoff(TASKLET_SOFTIRQ); 810 raise_softirq_irqoff(TASKLET_SOFTIRQ);
811 811
812 if (&per_cpu(tasklet_hi_vec, cpu).head != per_cpu(tasklet_hi_vec, cpu).tail) { 812 if (&per_cpu(tasklet_hi_vec, cpu).head != per_cpu(tasklet_hi_vec, cpu).tail) {
813 *__get_cpu_var(tasklet_hi_vec).tail = per_cpu(tasklet_hi_vec, cpu).head; 813 *__this_cpu_read(tasklet_hi_vec.tail) = per_cpu(tasklet_hi_vec, cpu).head;
814 __get_cpu_var(tasklet_hi_vec).tail = per_cpu(tasklet_hi_vec, cpu).tail; 814 __this_cpu_write(tasklet_hi_vec.tail, per_cpu(tasklet_hi_vec, cpu).tail);
815 per_cpu(tasklet_hi_vec, cpu).head = NULL; 815 per_cpu(tasklet_hi_vec, cpu).head = NULL;
816 per_cpu(tasklet_hi_vec, cpu).tail = &per_cpu(tasklet_hi_vec, cpu).head; 816 per_cpu(tasklet_hi_vec, cpu).tail = &per_cpu(tasklet_hi_vec, cpu).head;
817 } 817 }
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index 3308fd7f1b52..69691eb4b715 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -89,8 +89,7 @@ static int prepare_reply(struct genl_info *info, u8 cmd, struct sk_buff **skbp,
89 return -ENOMEM; 89 return -ENOMEM;
90 90
91 if (!info) { 91 if (!info) {
92 int seq = get_cpu_var(taskstats_seqnum)++; 92 int seq = this_cpu_inc_return(taskstats_seqnum) - 1;
93 put_cpu_var(taskstats_seqnum);
94 93
95 reply = genlmsg_put(skb, 0, seq, &family, 0, cmd); 94 reply = genlmsg_put(skb, 0, seq, &family, 0, cmd);
96 } else 95 } else
@@ -612,7 +611,7 @@ void taskstats_exit(struct task_struct *tsk, int group_dead)
612 fill_tgid_exit(tsk); 611 fill_tgid_exit(tsk);
613 } 612 }
614 613
615 listeners = &__raw_get_cpu_var(listener_array); 614 listeners = __this_cpu_ptr(&listener_array);
616 if (list_empty(&listeners->list)) 615 if (list_empty(&listeners->list))
617 return; 616 return;
618 617
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index b6b898d2eeef..051bc80a0c43 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -49,7 +49,7 @@ struct tick_device *tick_get_device(int cpu)
49 */ 49 */
50int tick_is_oneshot_available(void) 50int tick_is_oneshot_available(void)
51{ 51{
52 struct clock_event_device *dev = __get_cpu_var(tick_cpu_device).evtdev; 52 struct clock_event_device *dev = __this_cpu_read(tick_cpu_device.evtdev);
53 53
54 return dev && (dev->features & CLOCK_EVT_FEAT_ONESHOT); 54 return dev && (dev->features & CLOCK_EVT_FEAT_ONESHOT);
55} 55}
diff --git a/kernel/time/tick-oneshot.c b/kernel/time/tick-oneshot.c
index aada0e52680a..5cbc101f908b 100644
--- a/kernel/time/tick-oneshot.c
+++ b/kernel/time/tick-oneshot.c
@@ -95,7 +95,7 @@ int tick_dev_program_event(struct clock_event_device *dev, ktime_t expires,
95 */ 95 */
96int tick_program_event(ktime_t expires, int force) 96int tick_program_event(ktime_t expires, int force)
97{ 97{
98 struct clock_event_device *dev = __get_cpu_var(tick_cpu_device).evtdev; 98 struct clock_event_device *dev = __this_cpu_read(tick_cpu_device.evtdev);
99 99
100 return tick_dev_program_event(dev, expires, force); 100 return tick_dev_program_event(dev, expires, force);
101} 101}
@@ -167,7 +167,7 @@ int tick_oneshot_mode_active(void)
167 int ret; 167 int ret;
168 168
169 local_irq_save(flags); 169 local_irq_save(flags);
170 ret = __get_cpu_var(tick_cpu_device).mode == TICKDEV_MODE_ONESHOT; 170 ret = __this_cpu_read(tick_cpu_device.mode) == TICKDEV_MODE_ONESHOT;
171 local_irq_restore(flags); 171 local_irq_restore(flags);
172 172
173 return ret; 173 return ret;
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 6e7b575ac33c..d7ebdf4cea98 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -118,12 +118,12 @@ static void __touch_watchdog(void)
118{ 118{
119 int this_cpu = smp_processor_id(); 119 int this_cpu = smp_processor_id();
120 120
121 __get_cpu_var(watchdog_touch_ts) = get_timestamp(this_cpu); 121 __this_cpu_write(watchdog_touch_ts, get_timestamp(this_cpu));
122} 122}
123 123
124void touch_softlockup_watchdog(void) 124void touch_softlockup_watchdog(void)
125{ 125{
126 __raw_get_cpu_var(watchdog_touch_ts) = 0; 126 __this_cpu_write(watchdog_touch_ts, 0);
127} 127}
128EXPORT_SYMBOL(touch_softlockup_watchdog); 128EXPORT_SYMBOL(touch_softlockup_watchdog);
129 129
@@ -167,12 +167,12 @@ void touch_softlockup_watchdog_sync(void)
167/* watchdog detector functions */ 167/* watchdog detector functions */
168static int is_hardlockup(void) 168static int is_hardlockup(void)
169{ 169{
170 unsigned long hrint = __get_cpu_var(hrtimer_interrupts); 170 unsigned long hrint = __this_cpu_read(hrtimer_interrupts);
171 171
172 if (__get_cpu_var(hrtimer_interrupts_saved) == hrint) 172 if (__this_cpu_read(hrtimer_interrupts_saved) == hrint)
173 return 1; 173 return 1;
174 174
175 __get_cpu_var(hrtimer_interrupts_saved) = hrint; 175 __this_cpu_write(hrtimer_interrupts_saved, hrint);
176 return 0; 176 return 0;
177} 177}
178#endif 178#endif
@@ -205,8 +205,8 @@ static void watchdog_overflow_callback(struct perf_event *event, int nmi,
205 /* Ensure the watchdog never gets throttled */ 205 /* Ensure the watchdog never gets throttled */
206 event->hw.interrupts = 0; 206 event->hw.interrupts = 0;
207 207
208 if (__get_cpu_var(watchdog_nmi_touch) == true) { 208 if (__this_cpu_read(watchdog_nmi_touch) == true) {
209 __get_cpu_var(watchdog_nmi_touch) = false; 209 __this_cpu_write(watchdog_nmi_touch, false);
210 return; 210 return;
211 } 211 }
212 212
@@ -220,7 +220,7 @@ static void watchdog_overflow_callback(struct perf_event *event, int nmi,
220 int this_cpu = smp_processor_id(); 220 int this_cpu = smp_processor_id();
221 221
222 /* only print hardlockups once */ 222 /* only print hardlockups once */
223 if (__get_cpu_var(hard_watchdog_warn) == true) 223 if (__this_cpu_read(hard_watchdog_warn) == true)
224 return; 224 return;
225 225
226 if (hardlockup_panic) 226 if (hardlockup_panic)
@@ -228,16 +228,16 @@ static void watchdog_overflow_callback(struct perf_event *event, int nmi,
228 else 228 else
229 WARN(1, "Watchdog detected hard LOCKUP on cpu %d", this_cpu); 229 WARN(1, "Watchdog detected hard LOCKUP on cpu %d", this_cpu);
230 230
231 __get_cpu_var(hard_watchdog_warn) = true; 231 __this_cpu_write(hard_watchdog_warn, true);
232 return; 232 return;
233 } 233 }
234 234
235 __get_cpu_var(hard_watchdog_warn) = false; 235 __this_cpu_write(hard_watchdog_warn, false);
236 return; 236 return;
237} 237}
238static void watchdog_interrupt_count(void) 238static void watchdog_interrupt_count(void)
239{ 239{
240 __get_cpu_var(hrtimer_interrupts)++; 240 __this_cpu_inc(hrtimer_interrupts);
241} 241}
242#else 242#else
243static inline void watchdog_interrupt_count(void) { return; } 243static inline void watchdog_interrupt_count(void) { return; }
@@ -246,7 +246,7 @@ static inline void watchdog_interrupt_count(void) { return; }
246/* watchdog kicker functions */ 246/* watchdog kicker functions */
247static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer) 247static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
248{ 248{
249 unsigned long touch_ts = __get_cpu_var(watchdog_touch_ts); 249 unsigned long touch_ts = __this_cpu_read(watchdog_touch_ts);
250 struct pt_regs *regs = get_irq_regs(); 250 struct pt_regs *regs = get_irq_regs();
251 int duration; 251 int duration;
252 252
@@ -254,18 +254,18 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
254 watchdog_interrupt_count(); 254 watchdog_interrupt_count();
255 255
256 /* kick the softlockup detector */ 256 /* kick the softlockup detector */
257 wake_up_process(__get_cpu_var(softlockup_watchdog)); 257 wake_up_process(__this_cpu_read(softlockup_watchdog));
258 258
259 /* .. and repeat */ 259 /* .. and repeat */
260 hrtimer_forward_now(hrtimer, ns_to_ktime(get_sample_period())); 260 hrtimer_forward_now(hrtimer, ns_to_ktime(get_sample_period()));
261 261
262 if (touch_ts == 0) { 262 if (touch_ts == 0) {
263 if (unlikely(__get_cpu_var(softlockup_touch_sync))) { 263 if (unlikely(__this_cpu_read(softlockup_touch_sync))) {
264 /* 264 /*
265 * If the time stamp was touched atomically 265 * If the time stamp was touched atomically
266 * make sure the scheduler tick is up to date. 266 * make sure the scheduler tick is up to date.
267 */ 267 */
268 __get_cpu_var(softlockup_touch_sync) = false; 268 __this_cpu_write(softlockup_touch_sync, false);
269 sched_clock_tick(); 269 sched_clock_tick();
270 } 270 }
271 __touch_watchdog(); 271 __touch_watchdog();
@@ -281,7 +281,7 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
281 duration = is_softlockup(touch_ts); 281 duration = is_softlockup(touch_ts);
282 if (unlikely(duration)) { 282 if (unlikely(duration)) {
283 /* only warn once */ 283 /* only warn once */
284 if (__get_cpu_var(soft_watchdog_warn) == true) 284 if (__this_cpu_read(soft_watchdog_warn) == true)
285 return HRTIMER_RESTART; 285 return HRTIMER_RESTART;
286 286
287 printk(KERN_ERR "BUG: soft lockup - CPU#%d stuck for %us! [%s:%d]\n", 287 printk(KERN_ERR "BUG: soft lockup - CPU#%d stuck for %us! [%s:%d]\n",
@@ -296,9 +296,9 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
296 296
297 if (softlockup_panic) 297 if (softlockup_panic)
298 panic("softlockup: hung tasks"); 298 panic("softlockup: hung tasks");
299 __get_cpu_var(soft_watchdog_warn) = true; 299 __this_cpu_write(soft_watchdog_warn, true);
300 } else 300 } else
301 __get_cpu_var(soft_watchdog_warn) = false; 301 __this_cpu_write(soft_watchdog_warn, false);
302 302
303 return HRTIMER_RESTART; 303 return HRTIMER_RESTART;
304} 304}
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index 604678d7d06d..28f2c33c6b53 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -72,18 +72,16 @@ EXPORT_SYMBOL(percpu_counter_set);
72void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch) 72void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch)
73{ 73{
74 s64 count; 74 s64 count;
75 s32 *pcount;
76 75
77 preempt_disable(); 76 preempt_disable();
78 pcount = this_cpu_ptr(fbc->counters); 77 count = __this_cpu_read(*fbc->counters) + amount;
79 count = *pcount + amount;
80 if (count >= batch || count <= -batch) { 78 if (count >= batch || count <= -batch) {
81 spin_lock(&fbc->lock); 79 spin_lock(&fbc->lock);
82 fbc->count += count; 80 fbc->count += count;
83 *pcount = 0; 81 __this_cpu_write(*fbc->counters, 0);
84 spin_unlock(&fbc->lock); 82 spin_unlock(&fbc->lock);
85 } else { 83 } else {
86 *pcount = count; 84 __this_cpu_write(*fbc->counters, count);
87 } 85 }
88 preempt_enable(); 86 preempt_enable();
89} 87}
diff --git a/mm/percpu.c b/mm/percpu.c
index 02ba91230b99..3dd4984bdef8 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -293,12 +293,8 @@ static void *pcpu_mem_alloc(size_t size)
293 293
294 if (size <= PAGE_SIZE) 294 if (size <= PAGE_SIZE)
295 return kzalloc(size, GFP_KERNEL); 295 return kzalloc(size, GFP_KERNEL);
296 else { 296 else
297 void *ptr = vmalloc(size); 297 return vzalloc(size);
298 if (ptr)
299 memset(ptr, 0, size);
300 return ptr;
301 }
302} 298}
303 299
304/** 300/**
diff --git a/mm/slab.c b/mm/slab.c
index 39e92c0e6273..e9f92987954a 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -829,12 +829,12 @@ static void init_reap_node(int cpu)
829 829
830static void next_reap_node(void) 830static void next_reap_node(void)
831{ 831{
832 int node = __get_cpu_var(slab_reap_node); 832 int node = __this_cpu_read(slab_reap_node);
833 833
834 node = next_node(node, node_online_map); 834 node = next_node(node, node_online_map);
835 if (unlikely(node >= MAX_NUMNODES)) 835 if (unlikely(node >= MAX_NUMNODES))
836 node = first_node(node_online_map); 836 node = first_node(node_online_map);
837 __get_cpu_var(slab_reap_node) = node; 837 __this_cpu_write(slab_reap_node, node);
838} 838}
839 839
840#else 840#else
@@ -1012,7 +1012,7 @@ static void __drain_alien_cache(struct kmem_cache *cachep,
1012 */ 1012 */
1013static void reap_alien(struct kmem_cache *cachep, struct kmem_list3 *l3) 1013static void reap_alien(struct kmem_cache *cachep, struct kmem_list3 *l3)
1014{ 1014{
1015 int node = __get_cpu_var(slab_reap_node); 1015 int node = __this_cpu_read(slab_reap_node);
1016 1016
1017 if (l3->alien) { 1017 if (l3->alien) {
1018 struct array_cache *ac = l3->alien[node]; 1018 struct array_cache *ac = l3->alien[node];
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 33c33e7a0f9b..312d728976f1 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -167,36 +167,24 @@ static void refresh_zone_stat_thresholds(void)
167void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item, 167void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
168 int delta) 168 int delta)
169{ 169{
170 struct per_cpu_pageset *pcp = this_cpu_ptr(zone->pageset); 170 struct per_cpu_pageset __percpu *pcp = zone->pageset;
171 171 s8 __percpu *p = pcp->vm_stat_diff + item;
172 s8 *p = pcp->vm_stat_diff + item;
173 long x; 172 long x;
173 long t;
174
175 x = delta + __this_cpu_read(*p);
174 176
175 x = delta + *p; 177 t = __this_cpu_read(pcp->stat_threshold);
176 178
177 if (unlikely(x > pcp->stat_threshold || x < -pcp->stat_threshold)) { 179 if (unlikely(x > t || x < -t)) {
178 zone_page_state_add(x, zone, item); 180 zone_page_state_add(x, zone, item);
179 x = 0; 181 x = 0;
180 } 182 }
181 *p = x; 183 __this_cpu_write(*p, x);
182} 184}
183EXPORT_SYMBOL(__mod_zone_page_state); 185EXPORT_SYMBOL(__mod_zone_page_state);
184 186
185/* 187/*
186 * For an unknown interrupt state
187 */
188void mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
189 int delta)
190{
191 unsigned long flags;
192
193 local_irq_save(flags);
194 __mod_zone_page_state(zone, item, delta);
195 local_irq_restore(flags);
196}
197EXPORT_SYMBOL(mod_zone_page_state);
198
199/*
200 * Optimized increment and decrement functions. 188 * Optimized increment and decrement functions.
201 * 189 *
202 * These are only for a single page and therefore can take a struct page * 190 * These are only for a single page and therefore can take a struct page *
@@ -221,16 +209,17 @@ EXPORT_SYMBOL(mod_zone_page_state);
221 */ 209 */
222void __inc_zone_state(struct zone *zone, enum zone_stat_item item) 210void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
223{ 211{
224 struct per_cpu_pageset *pcp = this_cpu_ptr(zone->pageset); 212 struct per_cpu_pageset __percpu *pcp = zone->pageset;
225 s8 *p = pcp->vm_stat_diff + item; 213 s8 __percpu *p = pcp->vm_stat_diff + item;
214 s8 v, t;
226 215
227 (*p)++; 216 v = __this_cpu_inc_return(*p);
217 t = __this_cpu_read(pcp->stat_threshold);
218 if (unlikely(v > t)) {
219 s8 overstep = t >> 1;
228 220
229 if (unlikely(*p > pcp->stat_threshold)) { 221 zone_page_state_add(v + overstep, zone, item);
230 int overstep = pcp->stat_threshold / 2; 222 __this_cpu_write(*p, -overstep);
231
232 zone_page_state_add(*p + overstep, zone, item);
233 *p = -overstep;
234 } 223 }
235} 224}
236 225
@@ -242,16 +231,17 @@ EXPORT_SYMBOL(__inc_zone_page_state);
242 231
243void __dec_zone_state(struct zone *zone, enum zone_stat_item item) 232void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
244{ 233{
245 struct per_cpu_pageset *pcp = this_cpu_ptr(zone->pageset); 234 struct per_cpu_pageset __percpu *pcp = zone->pageset;
246 s8 *p = pcp->vm_stat_diff + item; 235 s8 __percpu *p = pcp->vm_stat_diff + item;
247 236 s8 v, t;
248 (*p)--;
249 237
250 if (unlikely(*p < - pcp->stat_threshold)) { 238 v = __this_cpu_dec_return(*p);
251 int overstep = pcp->stat_threshold / 2; 239 t = __this_cpu_read(pcp->stat_threshold);
240 if (unlikely(v < - t)) {
241 s8 overstep = t >> 1;
252 242
253 zone_page_state_add(*p - overstep, zone, item); 243 zone_page_state_add(v - overstep, zone, item);
254 *p = overstep; 244 __this_cpu_write(*p, overstep);
255 } 245 }
256} 246}
257 247
@@ -261,6 +251,92 @@ void __dec_zone_page_state(struct page *page, enum zone_stat_item item)
261} 251}
262EXPORT_SYMBOL(__dec_zone_page_state); 252EXPORT_SYMBOL(__dec_zone_page_state);
263 253
254#ifdef CONFIG_CMPXCHG_LOCAL
255/*
256 * If we have cmpxchg_local support then we do not need to incur the overhead
257 * that comes with local_irq_save/restore if we use this_cpu_cmpxchg.
258 *
259 * mod_state() modifies the zone counter state through atomic per cpu
260 * operations.
261 *
262 * Overstep mode specifies how overstep should handled:
263 * 0 No overstepping
264 * 1 Overstepping half of threshold
265 * -1 Overstepping minus half of threshold
266*/
267static inline void mod_state(struct zone *zone,
268 enum zone_stat_item item, int delta, int overstep_mode)
269{
270 struct per_cpu_pageset __percpu *pcp = zone->pageset;
271 s8 __percpu *p = pcp->vm_stat_diff + item;
272 long o, n, t, z;
273
274 do {
275 z = 0; /* overflow to zone counters */
276
277 /*
278 * The fetching of the stat_threshold is racy. We may apply
279 * a counter threshold to the wrong the cpu if we get
280 * rescheduled while executing here. However, the following
281 * will apply the threshold again and therefore bring the
282 * counter under the threshold.
283 */
284 t = this_cpu_read(pcp->stat_threshold);
285
286 o = this_cpu_read(*p);
287 n = delta + o;
288
289 if (n > t || n < -t) {
290 int os = overstep_mode * (t >> 1) ;
291
292 /* Overflow must be added to zone counters */
293 z = n + os;
294 n = -os;
295 }
296 } while (this_cpu_cmpxchg(*p, o, n) != o);
297
298 if (z)
299 zone_page_state_add(z, zone, item);
300}
301
302void mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
303 int delta)
304{
305 mod_state(zone, item, delta, 0);
306}
307EXPORT_SYMBOL(mod_zone_page_state);
308
309void inc_zone_state(struct zone *zone, enum zone_stat_item item)
310{
311 mod_state(zone, item, 1, 1);
312}
313
314void inc_zone_page_state(struct page *page, enum zone_stat_item item)
315{
316 mod_state(page_zone(page), item, 1, 1);
317}
318EXPORT_SYMBOL(inc_zone_page_state);
319
320void dec_zone_page_state(struct page *page, enum zone_stat_item item)
321{
322 mod_state(page_zone(page), item, -1, -1);
323}
324EXPORT_SYMBOL(dec_zone_page_state);
325#else
326/*
327 * Use interrupt disable to serialize counter updates
328 */
329void mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
330 int delta)
331{
332 unsigned long flags;
333
334 local_irq_save(flags);
335 __mod_zone_page_state(zone, item, delta);
336 local_irq_restore(flags);
337}
338EXPORT_SYMBOL(mod_zone_page_state);
339
264void inc_zone_state(struct zone *zone, enum zone_stat_item item) 340void inc_zone_state(struct zone *zone, enum zone_stat_item item)
265{ 341{
266 unsigned long flags; 342 unsigned long flags;
@@ -291,6 +367,7 @@ void dec_zone_page_state(struct page *page, enum zone_stat_item item)
291 local_irq_restore(flags); 367 local_irq_restore(flags);
292} 368}
293EXPORT_SYMBOL(dec_zone_page_state); 369EXPORT_SYMBOL(dec_zone_page_state);
370#endif
294 371
295/* 372/*
296 * Update the zone counters for one cpu. 373 * Update the zone counters for one cpu.
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-26 16:06:33 -0500