#define __local_add(i,l) ((l)->a.counter+=(i))
#define __local_sub(i,l) ((l)->a.counter-=(i))
-/* Use these for per-cpu local_t variables: on some archs they are
- * much more efficient than these naive implementations. Note they take
- * a variable, not an address.
- */
-#define cpu_local_read(l) local_read(&__get_cpu_var(l))
-#define cpu_local_set(l, i) local_set(&__get_cpu_var(l), (i))
-
-#define cpu_local_inc(l) local_inc(&__get_cpu_var(l))
-#define cpu_local_dec(l) local_dec(&__get_cpu_var(l))
-#define cpu_local_add(i, l) local_add((i), &__get_cpu_var(l))
-#define cpu_local_sub(i, l) local_sub((i), &__get_cpu_var(l))
-
-#define __cpu_local_inc(l) __local_inc(&__get_cpu_var(l))
-#define __cpu_local_dec(l) __local_dec(&__get_cpu_var(l))
-#define __cpu_local_add(i, l) __local_add((i), &__get_cpu_var(l))
-#define __cpu_local_sub(i, l) __local_sub((i), &__get_cpu_var(l))
-
#endif /* _ALPHA_LOCAL_H */
ENTRY(_ret_from_exception)
#ifdef CONFIG_IPIPE
- p2.l = _per_cpu__ipipe_percpu_domain;
- p2.h = _per_cpu__ipipe_percpu_domain;
+ p2.l = _ipipe_percpu_domain;
+ p2.h = _ipipe_percpu_domain;
r0.l = _ipipe_root;
r0.h = _ipipe_root;
r2 = [p2];
1: btstq 12, $r1 ; Refill?
bpl 2f
lsrq 24, $r1 ; Get PGD index (bit 24-31)
- move.d [per_cpu__current_pgd], $r0 ; PGD for the current process
+ move.d [current_pgd], $r0 ; PGD for the current process
move.d [$r0+$r1.d], $r0 ; Get PMD
beq 2f
nop
#ifdef CONFIG_SMP
move $s7, $acr ; PGD
#else
- move.d per_cpu__current_pgd, $acr ; PGD
+ move.d current_pgd, $acr ; PGD
#endif
; Look up PMD in PGD
lsrq 24, $r0 ; Get PMD index into PGD (bit 24-31)
#define PERCPU_ENOUGH_ROOM PERCPU_PAGE_SIZE
#ifdef __ASSEMBLY__
-# define THIS_CPU(var) (per_cpu__##var) /* use this to mark accesses to per-CPU variables... */
+# define THIS_CPU(var) (var) /* use this to mark accesses to per-CPU variables... */
#else /* !__ASSEMBLY__ */
* On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly
* more efficient.
*/
-#define __ia64_per_cpu_var(var) per_cpu__##var
+#define __ia64_per_cpu_var(var) var
#include <asm-generic/percpu.h>
#endif
#include <asm/processor.h>
-EXPORT_SYMBOL(per_cpu__ia64_cpu_info);
+EXPORT_SYMBOL(ia64_cpu_info);
#ifdef CONFIG_SMP
-EXPORT_SYMBOL(per_cpu__local_per_cpu_offset);
+EXPORT_SYMBOL(local_per_cpu_offset);
#endif
#include <asm/uaccess.h>
cpu = 0;
node = node_cpuid[cpu].nid;
cpu0_cpu_info = (struct cpuinfo_ia64 *)(__phys_per_cpu_start +
- ((char *)&per_cpu__ia64_cpu_info - __per_cpu_start));
+ ((char *)&ia64_cpu_info - __per_cpu_start));
cpu0_cpu_info->node_data = mem_data[node].node_data;
}
#endif /* CONFIG_SMP */
* a variable, not an address.
*/
-/* Need to disable preemption for the cpu local counters otherwise we could
- still access a variable of a previous CPU in a non local way. */
-#define cpu_local_wrap_v(l) \
- ({ local_t res__; \
- preempt_disable(); \
- res__ = (l); \
- preempt_enable(); \
- res__; })
-#define cpu_local_wrap(l) \
- ({ preempt_disable(); \
- l; \
- preempt_enable(); }) \
-
-#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
-#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
-#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
-#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
-#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
-#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
-
-#define __cpu_local_inc(l) cpu_local_inc(l)
-#define __cpu_local_dec(l) cpu_local_dec(l)
-#define __cpu_local_add(i, l) cpu_local_add((i), (l))
-#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
-
#endif /* __M32R_LOCAL_H */
* places
*/
-#define PER_CPU(var) per_cpu__##var
+#define PER_CPU(var) var
# ifndef __ASSEMBLY__
DECLARE_PER_CPU(unsigned int, KSP); /* Saved kernel stack pointer */
#define __local_add(i, l) ((l)->a.counter+=(i))
#define __local_sub(i, l) ((l)->a.counter-=(i))
-/* Need to disable preemption for the cpu local counters otherwise we could
- still access a variable of a previous CPU in a non atomic way. */
-#define cpu_local_wrap_v(l) \
- ({ local_t res__; \
- preempt_disable(); \
- res__ = (l); \
- preempt_enable(); \
- res__; })
-#define cpu_local_wrap(l) \
- ({ preempt_disable(); \
- l; \
- preempt_enable(); }) \
-
-#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
-#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
-#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
-#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
-#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
-#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
-
-#define __cpu_local_inc(l) cpu_local_inc(l)
-#define __cpu_local_dec(l) cpu_local_dec(l)
-#define __cpu_local_add(i, l) cpu_local_add((i), (l))
-#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
-
#endif /* _ARCH_MIPS_LOCAL_H */
#endif
/* t2 = &__per_cpu_offset[smp_processor_id()]; */
LDREGX \t2(\t1),\t2
- addil LT%per_cpu__exception_data,%r27
- LDREG RT%per_cpu__exception_data(%r1),\t1
+ addil LT%exception_data,%r27
+ LDREG RT%exception_data(%r1),\t1
/* t1 = &__get_cpu_var(exception_data) */
add,l \t1,\t2,\t1
/* t1 = t1->fault_ip */
#else
.macro get_fault_ip t1 t2
/* t1 = &__get_cpu_var(exception_data) */
- addil LT%per_cpu__exception_data,%r27
- LDREG RT%per_cpu__exception_data(%r1),\t2
+ addil LT%exception_data,%r27
+ LDREG RT%exception_data(%r1),\t2
/* t1 = t2->fault_ip */
LDREG EXCDATA_IP(\t2), \t1
.endm
#define __local_add(i,l) ((l)->a.counter+=(i))
#define __local_sub(i,l) ((l)->a.counter-=(i))
-/* Need to disable preemption for the cpu local counters otherwise we could
- still access a variable of a previous CPU in a non atomic way. */
-#define cpu_local_wrap_v(l) \
- ({ local_t res__; \
- preempt_disable(); \
- res__ = (l); \
- preempt_enable(); \
- res__; })
-#define cpu_local_wrap(l) \
- ({ preempt_disable(); \
- l; \
- preempt_enable(); }) \
-
-#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
-#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
-#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
-#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
-#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
-#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
-
-#define __cpu_local_inc(l) cpu_local_inc(l)
-#define __cpu_local_dec(l) cpu_local_dec(l)
-#define __cpu_local_add(i, l) cpu_local_add((i), (l))
-#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
-
#endif /* _ARCH_POWERPC_LOCAL_H */
#include <asm/perf_event.h>
#include <asm/ptrace.h>
-#include <asm/local.h>
#include <asm/pcr.h>
/* We don't have a real NMI on sparc64, but we can fake one
touched = 1;
}
if (!touched && __get_cpu_var(last_irq_sum) == sum) {
- __this_cpu_inc(per_cpu_var(alert_counter));
- if (__this_cpu_read(per_cpu_var(alert_counter)) == 30 * nmi_hz)
+ __this_cpu_inc(alert_counter);
+ if (__this_cpu_read(alert_counter) == 30 * nmi_hz)
die_nmi("BUG: NMI Watchdog detected LOCKUP",
regs, panic_on_timeout);
} else {
__get_cpu_var(last_irq_sum) = sum;
- __this_cpu_write(per_cpu_var(alert_counter), 0);
+ __this_cpu_write(alert_counter, 0);
}
if (__get_cpu_var(wd_enabled)) {
write_pic(picl_value(nmi_hz));
rtrap_irq:
rtrap:
#ifndef CONFIG_SMP
- sethi %hi(per_cpu____cpu_data), %l0
- lduw [%l0 + %lo(per_cpu____cpu_data)], %l1
+ sethi %hi(__cpu_data), %l0
+ lduw [%l0 + %lo(__cpu_data)], %l1
#else
- sethi %hi(per_cpu____cpu_data), %l0
- or %l0, %lo(per_cpu____cpu_data), %l0
+ sethi %hi(__cpu_data), %l0
+ or %l0, %lo(__cpu_data), %l0
lduw [%l0 + %g5], %l1
#endif
cmp %l1, 0
#define __local_add(i, l) local_add((i), (l))
#define __local_sub(i, l) local_sub((i), (l))
-/* Use these for per-cpu local_t variables: on some archs they are
- * much more efficient than these naive implementations. Note they take
- * a variable, not an address.
- *
- * X86_64: This could be done better if we moved the per cpu data directly
- * after GS.
- */
-
-/* Need to disable preemption for the cpu local counters otherwise we could
- still access a variable of a previous CPU in a non atomic way. */
-#define cpu_local_wrap_v(l) \
-({ \
- local_t res__; \
- preempt_disable(); \
- res__ = (l); \
- preempt_enable(); \
- res__; \
-})
-#define cpu_local_wrap(l) \
-({ \
- preempt_disable(); \
- (l); \
- preempt_enable(); \
-}) \
-
-#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var((l))))
-#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var((l)), (i)))
-#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var((l))))
-#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var((l))))
-#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var((l))))
-#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var((l))))
-
-#define __cpu_local_inc(l) cpu_local_inc((l))
-#define __cpu_local_dec(l) cpu_local_dec((l))
-#define __cpu_local_add(i, l) cpu_local_add((i), (l))
-#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
-
#endif /* _ASM_X86_LOCAL_H */
*/
#ifdef CONFIG_SMP
#define PER_CPU(var, reg) \
- __percpu_mov_op %__percpu_seg:per_cpu__this_cpu_off, reg; \
- lea per_cpu__##var(reg), reg
-#define PER_CPU_VAR(var) %__percpu_seg:per_cpu__##var
+ __percpu_mov_op %__percpu_seg:this_cpu_off, reg; \
+ lea var(reg), reg
+#define PER_CPU_VAR(var) %__percpu_seg:var
#else /* ! SMP */
-#define PER_CPU(var, reg) \
- __percpu_mov_op $per_cpu__##var, reg
-#define PER_CPU_VAR(var) per_cpu__##var
+#define PER_CPU(var, reg) __percpu_mov_op $var, reg
+#define PER_CPU_VAR(var) var
#endif /* SMP */
#ifdef CONFIG_X86_64_SMP
#define INIT_PER_CPU_VAR(var) init_per_cpu__##var
#else
-#define INIT_PER_CPU_VAR(var) per_cpu__##var
+#define INIT_PER_CPU_VAR(var) var
#endif
#else /* ...!ASSEMBLY */
* There also must be an entry in vmlinux_64.lds.S
*/
#define DECLARE_INIT_PER_CPU(var) \
- extern typeof(per_cpu_var(var)) init_per_cpu_var(var)
+ extern typeof(var) init_per_cpu_var(var)
#ifdef CONFIG_X86_64_SMP
#define init_per_cpu_var(var) init_per_cpu__##var
#else
-#define init_per_cpu_var(var) per_cpu_var(var)
+#define init_per_cpu_var(var) var
#endif
/* For arch-specific code, we can use direct single-insn ops (they
} \
} while (0)
+/*
+ * Generate a percpu add to memory instruction and optimize code
+ * if a one is added or subtracted.
+ */
+#define percpu_add_op(var, val) \
+do { \
+ typedef typeof(var) pao_T__; \
+ const int pao_ID__ = (__builtin_constant_p(val) && \
+ ((val) == 1 || (val) == -1)) ? (val) : 0; \
+ if (0) { \
+ pao_T__ pao_tmp__; \
+ pao_tmp__ = (val); \
+ } \
+ switch (sizeof(var)) { \
+ case 1: \
+ if (pao_ID__ == 1) \
+ asm("incb "__percpu_arg(0) : "+m" (var)); \
+ else if (pao_ID__ == -1) \
+ asm("decb "__percpu_arg(0) : "+m" (var)); \
+ else \
+ asm("addb %1, "__percpu_arg(0) \
+ : "+m" (var) \
+ : "qi" ((pao_T__)(val))); \
+ break; \
+ case 2: \
+ if (pao_ID__ == 1) \
+ asm("incw "__percpu_arg(0) : "+m" (var)); \
+ else if (pao_ID__ == -1) \
+ asm("decw "__percpu_arg(0) : "+m" (var)); \
+ else \
+ asm("addw %1, "__percpu_arg(0) \
+ : "+m" (var) \
+ : "ri" ((pao_T__)(val))); \
+ break; \
+ case 4: \
+ if (pao_ID__ == 1) \
+ asm("incl "__percpu_arg(0) : "+m" (var)); \
+ else if (pao_ID__ == -1) \
+ asm("decl "__percpu_arg(0) : "+m" (var)); \
+ else \
+ asm("addl %1, "__percpu_arg(0) \
+ : "+m" (var) \
+ : "ri" ((pao_T__)(val))); \
+ break; \
+ case 8: \
+ if (pao_ID__ == 1) \
+ asm("incq "__percpu_arg(0) : "+m" (var)); \
+ else if (pao_ID__ == -1) \
+ asm("decq "__percpu_arg(0) : "+m" (var)); \
+ else \
+ asm("addq %1, "__percpu_arg(0) \
+ : "+m" (var) \
+ : "re" ((pao_T__)(val))); \
+ break; \
+ default: __bad_percpu_size(); \
+ } \
+} while (0)
+
#define percpu_from_op(op, var, constraint) \
({ \
typeof(var) pfo_ret__; \
* per-thread variables implemented as per-cpu variables and thus
* stable for the duration of the respective task.
*/
-#define percpu_read(var) percpu_from_op("mov", per_cpu__##var, \
- "m" (per_cpu__##var))
-#define percpu_read_stable(var) percpu_from_op("mov", per_cpu__##var, \
- "p" (&per_cpu__##var))
-#define percpu_write(var, val) percpu_to_op("mov", per_cpu__##var, val)
-#define percpu_add(var, val) percpu_to_op("add", per_cpu__##var, val)
-#define percpu_sub(var, val) percpu_to_op("sub", per_cpu__##var, val)
-#define percpu_and(var, val) percpu_to_op("and", per_cpu__##var, val)
-#define percpu_or(var, val) percpu_to_op("or", per_cpu__##var, val)
-#define percpu_xor(var, val) percpu_to_op("xor", per_cpu__##var, val)
+#define percpu_read(var) percpu_from_op("mov", var, "m" (var))
+#define percpu_read_stable(var) percpu_from_op("mov", var, "p" (&(var)))
+#define percpu_write(var, val) percpu_to_op("mov", var, val)
+#define percpu_add(var, val) percpu_add_op(var, val)
+#define percpu_sub(var, val) percpu_add_op(var, -(val))
+#define percpu_and(var, val) percpu_to_op("and", var, val)
+#define percpu_or(var, val) percpu_to_op("or", var, val)
+#define percpu_xor(var, val) percpu_to_op("xor", var, val)
#define __this_cpu_read_1(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define __this_cpu_read_2(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define __this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val)
#define __this_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val)
#define __this_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val)
-#define __this_cpu_add_1(pcp, val) percpu_to_op("add", (pcp), val)
-#define __this_cpu_add_2(pcp, val) percpu_to_op("add", (pcp), val)
-#define __this_cpu_add_4(pcp, val) percpu_to_op("add", (pcp), val)
+#define __this_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
+#define __this_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
+#define __this_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
#define __this_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_write_1(pcp, val) percpu_to_op("mov", (pcp), val)
#define this_cpu_write_2(pcp, val) percpu_to_op("mov", (pcp), val)
#define this_cpu_write_4(pcp, val) percpu_to_op("mov", (pcp), val)
-#define this_cpu_add_1(pcp, val) percpu_to_op("add", (pcp), val)
-#define this_cpu_add_2(pcp, val) percpu_to_op("add", (pcp), val)
-#define this_cpu_add_4(pcp, val) percpu_to_op("add", (pcp), val)
+#define this_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
+#define this_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
+#define this_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
#define this_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_xor_2(pcp, val) percpu_to_op("xor", (pcp), val)
#define this_cpu_xor_4(pcp, val) percpu_to_op("xor", (pcp), val)
-#define irqsafe_cpu_add_1(pcp, val) percpu_to_op("add", (pcp), val)
-#define irqsafe_cpu_add_2(pcp, val) percpu_to_op("add", (pcp), val)
-#define irqsafe_cpu_add_4(pcp, val) percpu_to_op("add", (pcp), val)
+#define irqsafe_cpu_add_1(pcp, val) percpu_add_op((pcp), val)
+#define irqsafe_cpu_add_2(pcp, val) percpu_add_op((pcp), val)
+#define irqsafe_cpu_add_4(pcp, val) percpu_add_op((pcp), val)
#define irqsafe_cpu_and_1(pcp, val) percpu_to_op("and", (pcp), val)
#define irqsafe_cpu_and_2(pcp, val) percpu_to_op("and", (pcp), val)
#define irqsafe_cpu_and_4(pcp, val) percpu_to_op("and", (pcp), val)
#ifdef CONFIG_X86_64
#define __this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define __this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
-#define __this_cpu_add_8(pcp, val) percpu_to_op("add", (pcp), val)
+#define __this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define __this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define __this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define __this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
#define this_cpu_read_8(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define this_cpu_write_8(pcp, val) percpu_to_op("mov", (pcp), val)
-#define this_cpu_add_8(pcp, val) percpu_to_op("add", (pcp), val)
+#define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define this_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define this_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define this_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
-#define irqsafe_cpu_add_8(pcp, val) percpu_to_op("add", (pcp), val)
+#define irqsafe_cpu_add_8(pcp, val) percpu_add_op((pcp), val)
#define irqsafe_cpu_and_8(pcp, val) percpu_to_op("and", (pcp), val)
#define irqsafe_cpu_or_8(pcp, val) percpu_to_op("or", (pcp), val)
#define irqsafe_cpu_xor_8(pcp, val) percpu_to_op("xor", (pcp), val)
({ \
int old__; \
asm volatile("btr %2,"__percpu_arg(1)"\n\tsbbl %0,%0" \
- : "=r" (old__), "+m" (per_cpu__##var) \
+ : "=r" (old__), "+m" (var) \
: "dIr" (bit)); \
old__; \
})
"movl %P[task_canary](%[next]), %%ebx\n\t" \
"movl %%ebx, "__percpu_arg([stack_canary])"\n\t"
#define __switch_canary_oparam \
- , [stack_canary] "=m" (per_cpu_var(stack_canary.canary))
+ , [stack_canary] "=m" (stack_canary.canary)
#define __switch_canary_iparam \
, [task_canary] "i" (offsetof(struct task_struct, stack_canary))
#else /* CC_STACKPROTECTOR */
"movq %P[task_canary](%%rsi),%%r8\n\t" \
"movq %%r8,"__percpu_arg([gs_canary])"\n\t"
#define __switch_canary_oparam \
- , [gs_canary] "=m" (per_cpu_var(irq_stack_union.stack_canary))
+ , [gs_canary] "=m" (irq_stack_union.stack_canary)
#define __switch_canary_iparam \
, [task_canary] "i" (offsetof(struct task_struct, stack_canary))
#else /* CC_STACKPROTECTOR */
__switch_canary \
"movq %P[thread_info](%%rsi),%%r8\n\t" \
"movq %%rax,%%rdi\n\t" \
- "testl %[_tif_fork],%P[ti_flags](%%r8)\n\t" \
+ "testl %[_tif_fork],%P[ti_flags](%%r8)\n\t" \
"jnz ret_from_fork\n\t" \
RESTORE_CONTEXT \
: "=a" (last) \
[ti_flags] "i" (offsetof(struct thread_info, flags)), \
[_tif_fork] "i" (_TIF_FORK), \
[thread_info] "i" (offsetof(struct task_struct, stack)), \
- [current_task] "m" (per_cpu_var(current_task)) \
+ [current_task] "m" (current_task) \
__switch_canary_iparam \
: "memory", "cc" __EXTRA_CLOBBER)
#endif
* Ayiee, looks like this CPU is stuck ...
* wait a few IRQs (5 seconds) before doing the oops ...
*/
- __this_cpu_inc(per_cpu_var(alert_counter));
- if (__this_cpu_read(per_cpu_var(alert_counter)) == 5 * nmi_hz)
+ __this_cpu_inc(alert_counter);
+ if (__this_cpu_read(alert_counter) == 5 * nmi_hz)
/*
* die_nmi will return ONLY if NOTIFY_STOP happens..
*/
regs, panic_on_timeout);
} else {
__get_cpu_var(last_irq_sum) = sum;
- __this_cpu_write(per_cpu_var(alert_counter), 0);
+ __this_cpu_write(alert_counter, 0);
}
/* see if the nmi watchdog went off */
*/
cmpb $0,ready
jne 1f
- movl $per_cpu__gdt_page,%eax
- movl $per_cpu__stack_canary,%ecx
+ movl $gdt_page,%eax
+ movl $stack_canary,%ecx
movw %cx, 8 * GDT_ENTRY_STACK_CANARY + 2(%eax)
shrl $16, %ecx
movb %cl, 8 * GDT_ENTRY_STACK_CANARY + 4(%eax)
.word 0 # 32 bit align gdt_desc.address
ENTRY(early_gdt_descr)
.word GDT_ENTRIES*8-1
- .long per_cpu__gdt_page /* Overwritten for secondary CPUs */
+ .long gdt_page /* Overwritten for secondary CPUs */
/*
* The boot_gdt must mirror the equivalent in setup.S and is
* Per-cpu symbols which need to be offset from __per_cpu_load
* for the boot processor.
*/
-#define INIT_PER_CPU(x) init_per_cpu__##x = per_cpu__##x + __per_cpu_load
+#define INIT_PER_CPU(x) init_per_cpu__##x = x + __per_cpu_load
INIT_PER_CPU(gdt_page);
INIT_PER_CPU(irq_stack_union);
"kernel image bigger than KERNEL_IMAGE_SIZE");
#ifdef CONFIG_SMP
-. = ASSERT((per_cpu__irq_stack_union == 0),
+. = ASSERT((irq_stack_union == 0),
"irq_stack_union is not at start of per-cpu area");
#endif
GET_THREAD_INFO(%eax)
movl TI_cpu(%eax), %eax
movl __per_cpu_offset(,%eax,4), %eax
- mov per_cpu__xen_vcpu(%eax), %eax
+ mov xen_vcpu(%eax), %eax
#else
- movl per_cpu__xen_vcpu, %eax
+ movl xen_vcpu, %eax
#endif
/* check IF state we're restoring */
#define __local_add(i,l) local_set((l), local_read(l) + (i))
#define __local_sub(i,l) local_set((l), local_read(l) - (i))
-/* Use these for per-cpu local_t variables: on some archs they are
- * much more efficient than these naive implementations. Note they take
- * a variable (eg. mystruct.foo), not an address.
- */
-#define cpu_local_read(l) local_read(&__get_cpu_var(l))
-#define cpu_local_set(l, i) local_set(&__get_cpu_var(l), (i))
-#define cpu_local_inc(l) local_inc(&__get_cpu_var(l))
-#define cpu_local_dec(l) local_dec(&__get_cpu_var(l))
-#define cpu_local_add(i, l) local_add((i), &__get_cpu_var(l))
-#define cpu_local_sub(i, l) local_sub((i), &__get_cpu_var(l))
-
-/* Non-atomic increments, ie. preemption disabled and won't be touched
- * in interrupt, etc. Some archs can optimize this case well.
- */
-#define __cpu_local_inc(l) __local_inc(&__get_cpu_var(l))
-#define __cpu_local_dec(l) __local_dec(&__get_cpu_var(l))
-#define __cpu_local_add(i, l) __local_add((i), &__get_cpu_var(l))
-#define __cpu_local_sub(i, l) __local_sub((i), &__get_cpu_var(l))
-
#endif /* _ASM_GENERIC_LOCAL_H */
* Only S390 provides its own means of moving the pointer.
*/
#ifndef SHIFT_PERCPU_PTR
-#define SHIFT_PERCPU_PTR(__p, __offset) RELOC_HIDE((__p), (__offset))
+/* Weird cast keeps both GCC and sparse happy. */
+#define SHIFT_PERCPU_PTR(__p, __offset) ({ \
+ __verify_pcpu_ptr((__p)); \
+ RELOC_HIDE((typeof(*(__p)) __kernel __force *)(__p), (__offset)); \
+})
#endif
/*
* offset.
*/
#define per_cpu(var, cpu) \
- (*SHIFT_PERCPU_PTR(&per_cpu_var(var), per_cpu_offset(cpu)))
+ (*SHIFT_PERCPU_PTR(&(var), per_cpu_offset(cpu)))
#define __get_cpu_var(var) \
- (*SHIFT_PERCPU_PTR(&per_cpu_var(var), my_cpu_offset))
+ (*SHIFT_PERCPU_PTR(&(var), my_cpu_offset))
#define __raw_get_cpu_var(var) \
- (*SHIFT_PERCPU_PTR(&per_cpu_var(var), __my_cpu_offset))
+ (*SHIFT_PERCPU_PTR(&(var), __my_cpu_offset))
#define this_cpu_ptr(ptr) SHIFT_PERCPU_PTR(ptr, my_cpu_offset)
#define __this_cpu_ptr(ptr) SHIFT_PERCPU_PTR(ptr, __my_cpu_offset)
#else /* ! SMP */
-#define per_cpu(var, cpu) (*((void)(cpu), &per_cpu_var(var)))
-#define __get_cpu_var(var) per_cpu_var(var)
-#define __raw_get_cpu_var(var) per_cpu_var(var)
+#define per_cpu(var, cpu) (*((void)(cpu), &(var)))
+#define __get_cpu_var(var) (var)
+#define __raw_get_cpu_var(var) (var)
#define this_cpu_ptr(ptr) per_cpu_ptr(ptr, 0)
#define __this_cpu_ptr(ptr) this_cpu_ptr(ptr)
#ifdef __CHECKER__
# define __user __attribute__((noderef, address_space(1)))
-# define __kernel /* default address space */
+# define __kernel __attribute__((address_space(0)))
# define __safe __attribute__((safe))
# define __force __attribute__((force))
# define __nocast __attribute__((nocast))
# define __acquire(x) __context__(x,1)
# define __release(x) __context__(x,-1)
# define __cond_lock(x,c) ((c) ? ({ __acquire(x); 1; }) : 0)
+# define __percpu __attribute__((noderef, address_space(3)))
extern void __chk_user_ptr(const volatile void __user *);
extern void __chk_io_ptr(const volatile void __iomem *);
#else
# define __acquire(x) (void)0
# define __release(x) (void)0
# define __cond_lock(x,c) (c)
+# define __percpu
#endif
#ifdef __KERNEL__
extern void si_meminfo_node(struct sysinfo *val, int nid);
extern int after_bootmem;
-#ifdef CONFIG_NUMA
extern void setup_per_cpu_pageset(void);
-#else
-static inline void setup_per_cpu_pageset(void) {}
-#endif
extern void zone_pcp_update(struct zone *zone);
s8 stat_threshold;
s8 vm_stat_diff[NR_VM_ZONE_STAT_ITEMS];
#endif
-} ____cacheline_aligned_in_smp;
-
-#ifdef CONFIG_NUMA
-#define zone_pcp(__z, __cpu) ((__z)->pageset[(__cpu)])
-#else
-#define zone_pcp(__z, __cpu) (&(__z)->pageset[(__cpu)])
-#endif
+};
#endif /* !__GENERATING_BOUNDS.H */
*/
unsigned long min_unmapped_pages;
unsigned long min_slab_pages;
- struct per_cpu_pageset *pageset[NR_CPUS];
-#else
- struct per_cpu_pageset pageset[NR_CPUS];
#endif
+ struct per_cpu_pageset *pageset;
/*
* free areas of different sizes
*/
#include <linux/moduleparam.h>
#include <linux/tracepoint.h>
-#include <asm/local.h>
+#include <linux/percpu.h>
#include <asm/module.h>
#include <trace/events/module.h>
/* Destruction function. */
void (*exit)(void);
-#ifdef CONFIG_SMP
- char *refptr;
-#else
- local_t ref;
-#endif
+ struct module_ref {
+ int count;
+ } *refptr;
#endif
#ifdef CONFIG_CONSTRUCTORS
#define symbol_put(x) __symbol_put(MODULE_SYMBOL_PREFIX #x)
void symbol_put_addr(void *addr);
-static inline local_t *__module_ref_addr(struct module *mod, int cpu)
-{
-#ifdef CONFIG_SMP
- return (local_t *) (mod->refptr + per_cpu_offset(cpu));
-#else
- return &mod->ref;
-#endif
-}
-
/* Sometimes we know we already have a refcount, and it's easier not
to handle the error case (which only happens with rmmod --wait). */
static inline void __module_get(struct module *module)
{
if (module) {
- unsigned int cpu = get_cpu();
- local_inc(__module_ref_addr(module, cpu));
+ preempt_disable();
+ __this_cpu_inc(module->refptr->count);
trace_module_get(module, _THIS_IP_,
- local_read(__module_ref_addr(module, cpu)));
- put_cpu();
+ __this_cpu_read(module->refptr->count));
+ preempt_enable();
}
}
int ret = 1;
if (module) {
- unsigned int cpu = get_cpu();
+ preempt_disable();
+
if (likely(module_is_live(module))) {
- local_inc(__module_ref_addr(module, cpu));
+ __this_cpu_inc(module->refptr->count);
trace_module_get(module, _THIS_IP_,
- local_read(__module_ref_addr(module, cpu)));
+ __this_cpu_read(module->refptr->count));
}
else
ret = 0;
- put_cpu();
+
+ preempt_enable();
}
return ret;
}
#define _LINUX_PERCPU_DEFS_H
/*
- * Determine the real variable name from the name visible in the
- * kernel sources.
- */
-#define per_cpu_var(var) per_cpu__##var
-
-/*
* Base implementations of per-CPU variable declarations and definitions, where
* the section in which the variable is to be placed is provided by the
* 'sec' argument. This may be used to affect the parameters governing the
* that section.
*/
#define __PCPU_ATTRS(sec) \
- __attribute__((section(PER_CPU_BASE_SECTION sec))) \
+ __percpu __attribute__((section(PER_CPU_BASE_SECTION sec))) \
PER_CPU_ATTRIBUTES
#define __PCPU_DUMMY_ATTRS \
__attribute__((section(".discard"), unused))
/*
+ * Macro which verifies @ptr is a percpu pointer without evaluating
+ * @ptr. This is to be used in percpu accessors to verify that the
+ * input parameter is a percpu pointer.
+ */
+#define __verify_pcpu_ptr(ptr) do { \
+ const void __percpu *__vpp_verify = (typeof(ptr))NULL; \
+ (void)__vpp_verify; \
+} while (0)
+
+/*
* s390 and alpha modules require percpu variables to be defined as
* weak to force the compiler to generate GOT based external
* references for them. This is necessary because percpu sections
*/
#define DECLARE_PER_CPU_SECTION(type, name, sec) \
extern __PCPU_DUMMY_ATTRS char __pcpu_scope_##name; \
- extern __PCPU_ATTRS(sec) __typeof__(type) per_cpu__##name
+ extern __PCPU_ATTRS(sec) __typeof__(type) name
#define DEFINE_PER_CPU_SECTION(type, name, sec) \
__PCPU_DUMMY_ATTRS char __pcpu_scope_##name; \
extern __PCPU_DUMMY_ATTRS char __pcpu_unique_##name; \
__PCPU_DUMMY_ATTRS char __pcpu_unique_##name; \
__PCPU_ATTRS(sec) PER_CPU_DEF_ATTRIBUTES __weak \
- __typeof__(type) per_cpu__##name
+ __typeof__(type) name
#else
/*
* Normal declaration and definition macros.
*/
#define DECLARE_PER_CPU_SECTION(type, name, sec) \
- extern __PCPU_ATTRS(sec) __typeof__(type) per_cpu__##name
+ extern __PCPU_ATTRS(sec) __typeof__(type) name
#define DEFINE_PER_CPU_SECTION(type, name, sec) \
__PCPU_ATTRS(sec) PER_CPU_DEF_ATTRIBUTES \
- __typeof__(type) per_cpu__##name
+ __typeof__(type) name
#endif
/*
__aligned(PAGE_SIZE)
/*
- * Intermodule exports for per-CPU variables.
+ * Intermodule exports for per-CPU variables. sparse forgets about
+ * address space across EXPORT_SYMBOL(), change EXPORT_SYMBOL() to
+ * noop if __CHECKER__.
*/
-#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
-#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
-
+#ifndef __CHECKER__
+#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(var)
+#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(var)
+#else
+#define EXPORT_PER_CPU_SYMBOL(var)
+#define EXPORT_PER_CPU_SYMBOL_GPL(var)
+#endif
#endif /* _LINUX_PERCPU_DEFS_H */
* we force a syntax error here if it isn't.
*/
#define get_cpu_var(var) (*({ \
- extern int simple_identifier_##var(void); \
preempt_disable(); \
&__get_cpu_var(var); }))
-#define put_cpu_var(var) preempt_enable()
+
+/*
+ * The weird & is necessary because sparse considers (void)(var) to be
+ * a direct dereference of percpu variable (var).
+ */
+#define put_cpu_var(var) do { \
+ (void)&(var); \
+ preempt_enable(); \
+} while (0)
#ifdef CONFIG_SMP
*/
#define per_cpu_ptr(ptr, cpu) SHIFT_PERCPU_PTR((ptr), per_cpu_offset((cpu)))
-extern void *__alloc_reserved_percpu(size_t size, size_t align);
-extern void *__alloc_percpu(size_t size, size_t align);
-extern void free_percpu(void *__pdata);
+extern void __percpu *__alloc_reserved_percpu(size_t size, size_t align);
+extern void __percpu *__alloc_percpu(size_t size, size_t align);
+extern void free_percpu(void __percpu *__pdata);
extern phys_addr_t per_cpu_ptr_to_phys(void *addr);
#ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA
#define per_cpu_ptr(ptr, cpu) ({ (void)(cpu); (ptr); })
-static inline void *__alloc_percpu(size_t size, size_t align)
+static inline void __percpu *__alloc_percpu(size_t size, size_t align)
{
/*
* Can't easily make larger alignment work with kmalloc. WARN
return kzalloc(size, GFP_KERNEL);
}
-static inline void free_percpu(void *p)
+static inline void free_percpu(void __percpu *p)
{
kfree(p);
}
#endif /* CONFIG_SMP */
#define alloc_percpu(type) \
- (typeof(type) *)__alloc_percpu(sizeof(type), __alignof__(type))
+ (typeof(type) __percpu *)__alloc_percpu(sizeof(type), __alignof__(type))
/*
* Optional methods for optimized non-lvalue per-cpu variable access.
#ifndef percpu_read
# define percpu_read(var) \
({ \
- typeof(per_cpu_var(var)) __tmp_var__; \
- __tmp_var__ = get_cpu_var(var); \
- put_cpu_var(var); \
- __tmp_var__; \
+ typeof(var) *pr_ptr__ = &(var); \
+ typeof(var) pr_ret__; \
+ pr_ret__ = get_cpu_var(*pr_ptr__); \
+ put_cpu_var(*pr_ptr__); \
+ pr_ret__; \
})
#endif
#define __percpu_generic_to_op(var, val, op) \
do { \
- get_cpu_var(var) op val; \
- put_cpu_var(var); \
+ typeof(var) *pgto_ptr__ = &(var); \
+ get_cpu_var(*pgto_ptr__) op val; \
+ put_cpu_var(*pgto_ptr__); \
} while (0)
#ifndef percpu_write
#define __pcpu_size_call_return(stem, variable) \
({ typeof(variable) pscr_ret__; \
+ __verify_pcpu_ptr(&(variable)); \
switch(sizeof(variable)) { \
case 1: pscr_ret__ = stem##1(variable);break; \
case 2: pscr_ret__ = stem##2(variable);break; \
#define __pcpu_size_call(stem, variable, ...) \
do { \
+ __verify_pcpu_ptr(&(variable)); \
switch(sizeof(variable)) { \
case 1: stem##1(variable, __VA_ARGS__);break; \
case 2: stem##2(variable, __VA_ARGS__);break; \
/*
* Optimized manipulation for memory allocated through the per cpu
- * allocator or for addresses of per cpu variables (can be determined
- * using per_cpu_var(xx).
+ * allocator or for addresses of per cpu variables.
*
* These operation guarantee exclusivity of access for other operations
* on the *same* processor. The assumption is that per cpu data is only
#define _this_cpu_generic_to_op(pcp, val, op) \
do { \
preempt_disable(); \
- *__this_cpu_ptr(&pcp) op val; \
+ *__this_cpu_ptr(&(pcp)) op val; \
preempt_enable(); \
} while (0)
static inline void __count_vm_event(enum vm_event_item item)
{
- __this_cpu_inc(per_cpu_var(vm_event_states).event[item]);
+ __this_cpu_inc(vm_event_states.event[item]);
}
static inline void count_vm_event(enum vm_event_item item)
{
- this_cpu_inc(per_cpu_var(vm_event_states).event[item]);
+ this_cpu_inc(vm_event_states.event[item]);
}
static inline void __count_vm_events(enum vm_event_item item, long delta)
{
- __this_cpu_add(per_cpu_var(vm_event_states).event[item], delta);
+ __this_cpu_add(vm_event_states.event[item], delta);
}
static inline void count_vm_events(enum vm_event_item item, long delta)
{
- this_cpu_add(per_cpu_var(vm_event_states).event[item], delta);
+ this_cpu_add(vm_event_states.event[item], delta);
}
extern void all_vm_events(unsigned long *);
INIT_LIST_HEAD(&mod->modules_which_use_me);
for_each_possible_cpu(cpu)
- local_set(__module_ref_addr(mod, cpu), 0);
+ per_cpu_ptr(mod->refptr, cpu)->count = 0;
+
/* Hold reference count during initialization. */
- local_set(__module_ref_addr(mod, raw_smp_processor_id()), 1);
+ __this_cpu_write(mod->refptr->count, 1);
/* Backwards compatibility macros put refcount during init. */
mod->waiter = current;
}
int cpu;
for_each_possible_cpu(cpu)
- total += local_read(__module_ref_addr(mod, cpu));
+ total += per_cpu_ptr(mod->refptr, cpu)->count;
return total;
}
EXPORT_SYMBOL(module_refcount);
void module_put(struct module *module)
{
if (module) {
- unsigned int cpu = get_cpu();
- local_dec(__module_ref_addr(module, cpu));
+ preempt_disable();
+ __this_cpu_dec(module->refptr->count);
+
trace_module_put(module, _RET_IP_,
- local_read(__module_ref_addr(module, cpu)));
+ __this_cpu_read(module->refptr->count));
/* Maybe they're waiting for us to drop reference? */
if (unlikely(!module_is_live(module)))
wake_up_process(module->waiter);
- put_cpu();
+ preempt_enable();
}
}
EXPORT_SYMBOL(module_put);
kfree(mod->args);
if (mod->percpu)
percpu_modfree(mod->percpu);
-#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP)
+#if defined(CONFIG_MODULE_UNLOAD)
if (mod->refptr)
- percpu_modfree(mod->refptr);
+ free_percpu(mod->refptr);
#endif
/* Free lock-classes: */
lockdep_free_key_range(mod->module_core, mod->core_size);
mod = (void *)sechdrs[modindex].sh_addr;
kmemleak_load_module(mod, hdr, sechdrs, secstrings);
-#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP)
- mod->refptr = percpu_modalloc(sizeof(local_t), __alignof__(local_t),
- mod->name);
+#if defined(CONFIG_MODULE_UNLOAD)
+ mod->refptr = alloc_percpu(struct module_ref);
if (!mod->refptr) {
err = -ENOMEM;
goto free_init;
kobject_put(&mod->mkobj.kobj);
free_unload:
module_unload_free(mod);
-#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP)
- percpu_modfree(mod->refptr);
+#if defined(CONFIG_MODULE_UNLOAD)
+ free_percpu(mod->refptr);
free_init:
#endif
module_free(mod, mod->module_init);
/* Should not happen, but... */
pipe_count = RCU_TORTURE_PIPE_LEN;
}
- __this_cpu_inc(per_cpu_var(rcu_torture_count)[pipe_count]);
+ __this_cpu_inc(rcu_torture_count[pipe_count]);
completed = cur_ops->completed() - completed;
if (completed > RCU_TORTURE_PIPE_LEN) {
/* Should not happen, but... */
completed = RCU_TORTURE_PIPE_LEN;
}
- __this_cpu_inc(per_cpu_var(rcu_torture_batch)[completed]);
+ __this_cpu_inc(rcu_torture_batch[completed]);
preempt_enable();
cur_ops->readunlock(idx);
}
/* Should not happen, but... */
pipe_count = RCU_TORTURE_PIPE_LEN;
}
- __this_cpu_inc(per_cpu_var(rcu_torture_count)[pipe_count]);
+ __this_cpu_inc(rcu_torture_count[pipe_count]);
completed = cur_ops->completed() - completed;
if (completed > RCU_TORTURE_PIPE_LEN) {
/* Should not happen, but... */
completed = RCU_TORTURE_PIPE_LEN;
}
- __this_cpu_inc(per_cpu_var(rcu_torture_batch)[completed]);
+ __this_cpu_inc(rcu_torture_batch[completed]);
preempt_enable();
cur_ops->readunlock(idx);
schedule();
#include <linux/cpu.h>
#include <linux/fs.h>
+#include <asm/local.h>
#include "trace.h"
/*
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/time.h>
+#include <asm/local.h>
struct rb_page {
u64 ts;
static inline void ftrace_disable_cpu(void)
{
preempt_disable();
- __this_cpu_inc(per_cpu_var(ftrace_cpu_disabled));
+ __this_cpu_inc(ftrace_cpu_disabled);
}
static inline void ftrace_enable_cpu(void)
{
- __this_cpu_dec(per_cpu_var(ftrace_cpu_disabled));
+ __this_cpu_dec(ftrace_cpu_disabled);
preempt_enable();
}
struct ftrace_entry *entry;
/* If we are reading the ring buffer, don't trace */
- if (unlikely(__this_cpu_read(per_cpu_var(ftrace_cpu_disabled))))
+ if (unlikely(__this_cpu_read(ftrace_cpu_disabled)))
return;
event = trace_buffer_lock_reserve(buffer, TRACE_FN, sizeof(*entry),
struct ring_buffer *buffer = tr->buffer;
struct ftrace_graph_ent_entry *entry;
- if (unlikely(__this_cpu_read(per_cpu_var(ftrace_cpu_disabled))))
+ if (unlikely(__this_cpu_read(ftrace_cpu_disabled)))
return 0;
event = trace_buffer_lock_reserve(buffer, TRACE_GRAPH_ENT,
struct ring_buffer *buffer = tr->buffer;
struct ftrace_graph_ret_entry *entry;
- if (unlikely(__this_cpu_read(per_cpu_var(ftrace_cpu_disabled))))
+ if (unlikely(__this_cpu_read(ftrace_cpu_disabled)))
return;
event = trace_buffer_lock_reserve(buffer, TRACE_GRAPH_RET,
struct per_cpu_pageset *pset;
struct per_cpu_pages *pcp;
- pset = zone_pcp(zone, cpu);
+ local_irq_save(flags);
+ pset = per_cpu_ptr(zone->pageset, cpu);
pcp = &pset->pcp;
- local_irq_save(flags);
free_pcppages_bulk(zone, pcp->count, pcp);
pcp->count = 0;
local_irq_restore(flags);
arch_free_page(page, 0);
kernel_map_pages(page, 1, 0);
- pcp = &zone_pcp(zone, get_cpu())->pcp;
migratetype = get_pageblock_migratetype(page);
set_page_private(page, migratetype);
local_irq_save(flags);
migratetype = MIGRATE_MOVABLE;
}
+ pcp = &this_cpu_ptr(zone->pageset)->pcp;
if (cold)
list_add_tail(&page->lru, &pcp->lists[migratetype]);
else
out:
local_irq_restore(flags);
- put_cpu();
}
void free_hot_page(struct page *page)
unsigned long flags;
struct page *page;
int cold = !!(gfp_flags & __GFP_COLD);
- int cpu;
again:
- cpu = get_cpu();
if (likely(order == 0)) {
struct per_cpu_pages *pcp;
struct list_head *list;
- pcp = &zone_pcp(zone, cpu)->pcp;
- list = &pcp->lists[migratetype];
local_irq_save(flags);
+ pcp = &this_cpu_ptr(zone->pageset)->pcp;
+ list = &pcp->lists[migratetype];
if (list_empty(list)) {
pcp->count += rmqueue_bulk(zone, 0,
pcp->batch, list,
__count_zone_vm_events(PGALLOC, zone, 1 << order);
zone_statistics(preferred_zone, zone);
local_irq_restore(flags);
- put_cpu();
VM_BUG_ON(bad_range(zone, page));
if (prep_new_page(page, order, gfp_flags))
failed:
local_irq_restore(flags);
- put_cpu();
return NULL;
}
for_each_online_cpu(cpu) {
struct per_cpu_pageset *pageset;
- pageset = zone_pcp(zone, cpu);
+ pageset = per_cpu_ptr(zone->pageset, cpu);
printk("CPU %4d: hi:%5d, btch:%4d usd:%4d\n",
cpu, pageset->pcp.high,
#endif /* CONFIG_NUMA */
+/*
+ * Boot pageset table. One per cpu which is going to be used for all
+ * zones and all nodes. The parameters will be set in such a way
+ * that an item put on a list will immediately be handed over to
+ * the buddy list. This is safe since pageset manipulation is done
+ * with interrupts disabled.
+ *
+ * The boot_pagesets must be kept even after bootup is complete for
+ * unused processors and/or zones. They do play a role for bootstrapping
+ * hotplugged processors.
+ *
+ * zoneinfo_show() and maybe other functions do
+ * not check if the processor is online before following the pageset pointer.
+ * Other parts of the kernel may not check if the zone is available.
+ */
+static void setup_pageset(struct per_cpu_pageset *p, unsigned long batch);
+static DEFINE_PER_CPU(struct per_cpu_pageset, boot_pageset);
+
/* return values int ....just for stop_machine() */
static int __build_all_zonelists(void *dummy)
{
int nid;
+ int cpu;
#ifdef CONFIG_NUMA
memset(node_load, 0, sizeof(node_load));
build_zonelists(pgdat);
build_zonelist_cache(pgdat);
}
+
+ /*
+ * Initialize the boot_pagesets that are going to be used
+ * for bootstrapping processors. The real pagesets for
+ * each zone will be allocated later when the per cpu
+ * allocator is available.
+ *
+ * boot_pagesets are used also for bootstrapping offline
+ * cpus if the system is already booted because the pagesets
+ * are needed to initialize allocators on a specific cpu too.
+ * F.e. the percpu allocator needs the page allocator which
+ * needs the percpu allocator in order to allocate its pagesets
+ * (a chicken-egg dilemma).
+ */
+ for_each_possible_cpu(cpu)
+ setup_pageset(&per_cpu(boot_pageset, cpu), 0);
+
return 0;
}
pcp->batch = PAGE_SHIFT * 8;
}
-
-#ifdef CONFIG_NUMA
-/*
- * Boot pageset table. One per cpu which is going to be used for all
- * zones and all nodes. The parameters will be set in such a way
- * that an item put on a list will immediately be handed over to
- * the buddy list. This is safe since pageset manipulation is done
- * with interrupts disabled.
- *
- * Some NUMA counter updates may also be caught by the boot pagesets.
- *
- * The boot_pagesets must be kept even after bootup is complete for
- * unused processors and/or zones. They do play a role for bootstrapping
- * hotplugged processors.
- *
- * zoneinfo_show() and maybe other functions do
- * not check if the processor is online before following the pageset pointer.
- * Other parts of the kernel may not check if the zone is available.
- */
-static struct per_cpu_pageset boot_pageset[NR_CPUS];
-
/*
- * Dynamically allocate memory for the
- * per cpu pageset array in struct zone.
+ * Allocate per cpu pagesets and initialize them.
+ * Before this call only boot pagesets were available.
+ * Boot pagesets will no longer be used by this processorr
+ * after setup_per_cpu_pageset().
*/
-static int __cpuinit process_zones(int cpu)
+void __init setup_per_cpu_pageset(void)
{
- struct zone *zone, *dzone;
- int node = cpu_to_node(cpu);
-
- node_set_state(node, N_CPU); /* this node has a cpu */
+ struct zone *zone;
+ int cpu;
for_each_populated_zone(zone) {
- zone_pcp(zone, cpu) = kmalloc_node(sizeof(struct per_cpu_pageset),
- GFP_KERNEL, node);
- if (!zone_pcp(zone, cpu))
- goto bad;
-
- setup_pageset(zone_pcp(zone, cpu), zone_batchsize(zone));
-
- if (percpu_pagelist_fraction)
- setup_pagelist_highmark(zone_pcp(zone, cpu),
- (zone->present_pages / percpu_pagelist_fraction));
- }
-
- return 0;
-bad:
- for_each_zone(dzone) {
- if (!populated_zone(dzone))
- continue;
- if (dzone == zone)
- break;
- kfree(zone_pcp(dzone, cpu));
- zone_pcp(dzone, cpu) = &boot_pageset[cpu];
- }
- return -ENOMEM;
-}
+ zone->pageset = alloc_percpu(struct per_cpu_pageset);
-static inline void free_zone_pagesets(int cpu)
-{
- struct zone *zone;
-
- for_each_zone(zone) {
- struct per_cpu_pageset *pset = zone_pcp(zone, cpu);
+ for_each_possible_cpu(cpu) {
+ struct per_cpu_pageset *pcp = per_cpu_ptr(zone->pageset, cpu);
- /* Free per_cpu_pageset if it is slab allocated */
- if (pset != &boot_pageset[cpu])
- kfree(pset);
- zone_pcp(zone, cpu) = &boot_pageset[cpu];
- }
-}
+ setup_pageset(pcp, zone_batchsize(zone));
-static int __cpuinit pageset_cpuup_callback(struct notifier_block *nfb,
- unsigned long action,
- void *hcpu)
-{
- int cpu = (long)hcpu;
- int ret = NOTIFY_OK;
-
- switch (action) {
- case CPU_UP_PREPARE:
- case CPU_UP_PREPARE_FROZEN:
- if (process_zones(cpu))
- ret = NOTIFY_BAD;
- break;
- case CPU_UP_CANCELED:
- case CPU_UP_CANCELED_FROZEN:
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- free_zone_pagesets(cpu);
- break;
- default:
- break;
+ if (percpu_pagelist_fraction)
+ setup_pagelist_highmark(pcp,
+ (zone->present_pages /
+ percpu_pagelist_fraction));
+ }
}
- return ret;
}
-static struct notifier_block __cpuinitdata pageset_notifier =
- { &pageset_cpuup_callback, NULL, 0 };
-
-void __init setup_per_cpu_pageset(void)
-{
- int err;
-
- /* Initialize per_cpu_pageset for cpu 0.
- * A cpuup callback will do this for every cpu
- * as it comes online
- */
- err = process_zones(smp_processor_id());
- BUG_ON(err);
- register_cpu_notifier(&pageset_notifier);
-}
-
-#endif
-
static noinline __init_refok
int zone_wait_table_init(struct zone *zone, unsigned long zone_size_pages)
{
struct per_cpu_pageset *pset;
struct per_cpu_pages *pcp;
- pset = zone_pcp(zone, cpu);
+ pset = per_cpu_ptr(zone->pageset, cpu);
pcp = &pset->pcp;
local_irq_save(flags);
static __meminit void zone_pcp_init(struct zone *zone)
{
- int cpu;
- unsigned long batch = zone_batchsize(zone);
+ /*
+ * per cpu subsystem is not up at this point. The following code
+ * relies on the ability of the linker to provide the
+ * offset of a (static) per cpu variable into the per cpu area.
+ */
+ zone->pageset = &boot_pageset;
- for (cpu = 0; cpu < NR_CPUS; cpu++) {
-#ifdef CONFIG_NUMA
- /* Early boot. Slab allocator not functional yet */
- zone_pcp(zone, cpu) = &boot_pageset[cpu];
- setup_pageset(&boot_pageset[cpu],0);
-#else
- setup_pageset(zone_pcp(zone,cpu), batch);
-#endif
- }
if (zone->present_pages)
- printk(KERN_DEBUG " %s zone: %lu pages, LIFO batch:%lu\n",
- zone->name, zone->present_pages, batch);
+ printk(KERN_DEBUG " %s zone: %lu pages, LIFO batch:%u\n",
+ zone->name, zone->present_pages,
+ zone_batchsize(zone));
}
__meminit int init_currently_empty_zone(struct zone *zone,
if (!write || (ret == -EINVAL))
return ret;
for_each_populated_zone(zone) {
- for_each_online_cpu(cpu) {
+ for_each_possible_cpu(cpu) {
unsigned long high;
high = zone->present_pages / percpu_pagelist_fraction;
- setup_pagelist_highmark(zone_pcp(zone, cpu), high);
+ setup_pagelist_highmark(
+ per_cpu_ptr(zone->pageset, cpu), high);
}
}
return 0;
int rs, re;
/* quick path, check whether it's empty already */
- pcpu_for_each_unpop_region(chunk, rs, re, page_start, page_end) {
- if (rs == page_start && re == page_end)
- return;
- break;
- }
+ rs = page_start;
+ pcpu_next_unpop(chunk, &rs, &re, page_end);
+ if (rs == page_start && re == page_end)
+ return;
/* immutable chunks can't be depopulated */
WARN_ON(chunk->immutable);
int rs, re, rc;
/* quick path, check whether all pages are already there */
- pcpu_for_each_pop_region(chunk, rs, re, page_start, page_end) {
- if (rs == page_start && re == page_end)
- goto clear;
- break;
- }
+ rs = page_start;
+ pcpu_next_pop(chunk, &rs, &re, page_end);
+ if (rs == page_start && re == page_end)
+ goto clear;
/* need to allocate and map pages, this chunk can't be immutable */
WARN_ON(chunk->immutable);
threshold = calculate_threshold(zone);
for_each_online_cpu(cpu)
- zone_pcp(zone, cpu)->stat_threshold = threshold;
+ per_cpu_ptr(zone->pageset, cpu)->stat_threshold
+ = threshold;
}
}
void __mod_zone_page_state(struct zone *zone, enum zone_stat_item item,
int delta)
{
- struct per_cpu_pageset *pcp = zone_pcp(zone, smp_processor_id());
+ struct per_cpu_pageset *pcp = this_cpu_ptr(zone->pageset);
+
s8 *p = pcp->vm_stat_diff + item;
long x;
*/
void __inc_zone_state(struct zone *zone, enum zone_stat_item item)
{
- struct per_cpu_pageset *pcp = zone_pcp(zone, smp_processor_id());
+ struct per_cpu_pageset *pcp = this_cpu_ptr(zone->pageset);
s8 *p = pcp->vm_stat_diff + item;
(*p)++;
void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
{
- struct per_cpu_pageset *pcp = zone_pcp(zone, smp_processor_id());
+ struct per_cpu_pageset *pcp = this_cpu_ptr(zone->pageset);
s8 *p = pcp->vm_stat_diff + item;
(*p)--;
for_each_populated_zone(zone) {
struct per_cpu_pageset *p;
- p = zone_pcp(zone, cpu);
+ p = per_cpu_ptr(zone->pageset, cpu);
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
if (p->vm_stat_diff[i]) {
for_each_online_cpu(i) {
struct per_cpu_pageset *pageset;
- pageset = zone_pcp(zone, i);
+ pageset = per_cpu_ptr(zone->pageset, i);
seq_printf(m,
"\n cpu: %i"
"\n count: %i"
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
start_cpu_timer(cpu);
+ node_set_state(cpu_to_node(cpu), N_CPU);
break;
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff