x86: unify local_{32|64}.h
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Harvey Harrison
Ingo Molnar
Родитель
8ee5797a91
Коммит
5638f99394
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@ -1,5 +1,241 @@
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#ifdef CONFIG_X86_32
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# include "local_32.h"
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#else
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# include "local_64.h"
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#ifndef _ARCH_LOCAL_H
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#define _ARCH_LOCAL_H
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#include <linux/percpu.h>
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#include <asm/system.h>
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#include <asm/atomic.h>
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#include <asm/asm.h>
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typedef struct
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{
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atomic_long_t a;
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} local_t;
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#define LOCAL_INIT(i) { ATOMIC_LONG_INIT(i) }
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#define local_read(l) atomic_long_read(&(l)->a)
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#define local_set(l,i) atomic_long_set(&(l)->a, (i))
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static inline void local_inc(local_t *l)
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{
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__asm__ __volatile__(
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_ASM_INC "%0"
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:"+m" (l->a.counter));
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}
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static inline void local_dec(local_t *l)
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{
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__asm__ __volatile__(
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_ASM_DEC "%0"
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:"+m" (l->a.counter));
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}
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static inline void local_add(long i, local_t *l)
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{
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__asm__ __volatile__(
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_ASM_ADD "%1,%0"
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:"+m" (l->a.counter)
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:"ir" (i));
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}
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static inline void local_sub(long i, local_t *l)
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{
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__asm__ __volatile__(
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_ASM_SUB "%1,%0"
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:"+m" (l->a.counter)
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:"ir" (i));
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}
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/**
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* local_sub_and_test - subtract value from variable and test result
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* @i: integer value to subtract
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* @l: pointer to type local_t
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*
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* Atomically subtracts @i from @l and returns
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* true if the result is zero, or false for all
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* other cases.
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*/
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static inline int local_sub_and_test(long i, local_t *l)
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{
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unsigned char c;
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__asm__ __volatile__(
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_ASM_SUB "%2,%0; sete %1"
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:"+m" (l->a.counter), "=qm" (c)
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:"ir" (i) : "memory");
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return c;
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}
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/**
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* local_dec_and_test - decrement and test
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* @l: pointer to type local_t
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*
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* Atomically decrements @l by 1 and
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* returns true if the result is 0, or false for all other
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* cases.
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*/
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static inline int local_dec_and_test(local_t *l)
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{
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unsigned char c;
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__asm__ __volatile__(
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_ASM_DEC "%0; sete %1"
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:"+m" (l->a.counter), "=qm" (c)
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: : "memory");
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return c != 0;
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}
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/**
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* local_inc_and_test - increment and test
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* @l: pointer to type local_t
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*
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* Atomically increments @l by 1
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* and returns true if the result is zero, or false for all
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* other cases.
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*/
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static inline int local_inc_and_test(local_t *l)
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{
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unsigned char c;
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__asm__ __volatile__(
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_ASM_INC "%0; sete %1"
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:"+m" (l->a.counter), "=qm" (c)
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: : "memory");
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return c != 0;
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}
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/**
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* local_add_negative - add and test if negative
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* @i: integer value to add
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* @l: pointer to type local_t
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*
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* Atomically adds @i to @l and returns true
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* if the result is negative, or false when
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* result is greater than or equal to zero.
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*/
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static inline int local_add_negative(long i, local_t *l)
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{
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unsigned char c;
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__asm__ __volatile__(
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_ASM_ADD "%2,%0; sets %1"
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:"+m" (l->a.counter), "=qm" (c)
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:"ir" (i) : "memory");
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return c;
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}
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/**
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* local_add_return - add and return
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* @i: integer value to add
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* @l: pointer to type local_t
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*
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* Atomically adds @i to @l and returns @i + @l
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*/
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static inline long local_add_return(long i, local_t *l)
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{
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long __i;
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#ifdef CONFIG_M386
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unsigned long flags;
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if(unlikely(boot_cpu_data.x86 <= 3))
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goto no_xadd;
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#endif
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/* Modern 486+ processor */
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__i = i;
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__asm__ __volatile__(
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_ASM_XADD "%0, %1;"
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:"+r" (i), "+m" (l->a.counter)
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: : "memory");
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return i + __i;
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#ifdef CONFIG_M386
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no_xadd: /* Legacy 386 processor */
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local_irq_save(flags);
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__i = local_read(l);
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local_set(l, i + __i);
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local_irq_restore(flags);
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return i + __i;
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#endif
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}
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static inline long local_sub_return(long i, local_t *l)
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{
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return local_add_return(-i,l);
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}
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#define local_inc_return(l) (local_add_return(1,l))
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#define local_dec_return(l) (local_sub_return(1,l))
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#define local_cmpxchg(l, o, n) \
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(cmpxchg_local(&((l)->a.counter), (o), (n)))
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/* Always has a lock prefix */
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#define local_xchg(l, n) (xchg(&((l)->a.counter), (n)))
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/**
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* local_add_unless - add unless the number is a given value
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* @l: pointer of type local_t
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* @a: the amount to add to l...
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* @u: ...unless l is equal to u.
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*
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* Atomically adds @a to @l, so long as it was not @u.
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* Returns non-zero if @l was not @u, and zero otherwise.
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*/
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#define local_add_unless(l, a, u) \
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({ \
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long c, old; \
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c = local_read(l); \
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for (;;) { \
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if (unlikely(c == (u))) \
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break; \
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old = local_cmpxchg((l), c, c + (a)); \
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if (likely(old == c)) \
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break; \
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c = old; \
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} \
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c != (u); \
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})
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#define local_inc_not_zero(l) local_add_unless((l), 1, 0)
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/* On x86_32, these are no better than the atomic variants.
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* On x86-64 these are better than the atomic variants on SMP kernels
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* because they dont use a lock prefix.
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*/
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#define __local_inc(l) local_inc(l)
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#define __local_dec(l) local_dec(l)
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#define __local_add(i,l) local_add((i),(l))
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#define __local_sub(i,l) local_sub((i),(l))
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/* Use these for per-cpu local_t variables: on some archs they are
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* much more efficient than these naive implementations. Note they take
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* a variable, not an address.
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*
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* X86_64: This could be done better if we moved the per cpu data directly
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* after GS.
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*/
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/* Need to disable preemption for the cpu local counters otherwise we could
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still access a variable of a previous CPU in a non atomic way. */
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#define cpu_local_wrap_v(l) \
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({ local_t res__; \
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preempt_disable(); \
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res__ = (l); \
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preempt_enable(); \
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res__; })
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#define cpu_local_wrap(l) \
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({ preempt_disable(); \
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l; \
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preempt_enable(); }) \
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#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
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#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
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#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
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#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
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#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
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#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
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#define __cpu_local_inc(l) cpu_local_inc(l)
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#define __cpu_local_dec(l) cpu_local_dec(l)
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#define __cpu_local_add(i, l) cpu_local_add((i), (l))
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#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
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#endif /* _ARCH_LOCAL_H */
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@ -1,219 +0,0 @@
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#ifndef _ARCH_I386_LOCAL_H
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#define _ARCH_I386_LOCAL_H
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static inline void local_inc(local_t *l)
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{
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__asm__ __volatile__(
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_ASM_INC "%0"
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:"+m" (l->a.counter));
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}
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static inline void local_dec(local_t *l)
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{
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__asm__ __volatile__(
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_ASM_DEC "%0"
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:"+m" (l->a.counter));
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}
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static inline void local_add(long i, local_t *l)
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{
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__asm__ __volatile__(
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_ASM_ADD "%1,%0"
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:"+m" (l->a.counter)
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:"ir" (i));
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}
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static inline void local_sub(long i, local_t *l)
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{
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__asm__ __volatile__(
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_ASM_SUB "%1,%0"
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:"+m" (l->a.counter)
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:"ir" (i));
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}
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/**
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* local_sub_and_test - subtract value from variable and test result
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* @i: integer value to subtract
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* @l: pointer of type local_t
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*
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* Atomically subtracts @i from @l and returns
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* true if the result is zero, or false for all
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* other cases.
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*/
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static inline int local_sub_and_test(long i, local_t *l)
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{
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unsigned char c;
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__asm__ __volatile__(
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_ASM_SUB "%2,%0; sete %1"
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:"+m" (l->a.counter), "=qm" (c)
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:"ir" (i) : "memory");
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return c;
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}
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/**
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* local_dec_and_test - decrement and test
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* @l: pointer of type local_t
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*
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* Atomically decrements @l by 1 and
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* returns true if the result is 0, or false for all other
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* cases.
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*/
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static inline int local_dec_and_test(local_t *l)
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{
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unsigned char c;
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__asm__ __volatile__(
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_ASM_DEC "%0; sete %1"
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:"+m" (l->a.counter), "=qm" (c)
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: : "memory");
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return c != 0;
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}
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/**
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* local_inc_and_test - increment and test
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* @l: pointer of type local_t
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*
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* Atomically increments @l by 1
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* and returns true if the result is zero, or false for all
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* other cases.
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*/
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static inline int local_inc_and_test(local_t *l)
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{
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unsigned char c;
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__asm__ __volatile__(
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_ASM_INC "%0; sete %1"
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:"+m" (l->a.counter), "=qm" (c)
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: : "memory");
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return c != 0;
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}
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/**
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* local_add_negative - add and test if negative
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* @l: pointer of type local_t
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* @i: integer value to add
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*
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* Atomically adds @i to @l and returns true
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* if the result is negative, or false when
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* result is greater than or equal to zero.
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*/
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static inline int local_add_negative(long i, local_t *l)
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{
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unsigned char c;
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__asm__ __volatile__(
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_ASM_ADD "%2,%0; sets %1"
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:"+m" (l->a.counter), "=qm" (c)
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:"ir" (i) : "memory");
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return c;
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}
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/**
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* local_add_return - add and return
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* @l: pointer of type local_t
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* @i: integer value to add
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*
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* Atomically adds @i to @l and returns @i + @l
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*/
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static inline long local_add_return(long i, local_t *l)
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{
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long __i;
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#ifdef CONFIG_M386
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unsigned long flags;
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if(unlikely(boot_cpu_data.x86 <= 3))
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goto no_xadd;
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#endif
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/* Modern 486+ processor */
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__i = i;
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__asm__ __volatile__(
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_ASM_XADD "%0, %1;"
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:"+r" (i), "+m" (l->a.counter)
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: : "memory");
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return i + __i;
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#ifdef CONFIG_M386
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no_xadd: /* Legacy 386 processor */
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local_irq_save(flags);
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__i = local_read(l);
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local_set(l, i + __i);
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local_irq_restore(flags);
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return i + __i;
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#endif
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}
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static inline long local_sub_return(long i, local_t *l)
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{
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return local_add_return(-i,l);
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}
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#define local_inc_return(l) (local_add_return(1,l))
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#define local_dec_return(l) (local_sub_return(1,l))
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#define local_cmpxchg(l, o, n) \
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(cmpxchg_local(&((l)->a.counter), (o), (n)))
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/* Always has a lock prefix */
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#define local_xchg(l, n) (xchg(&((l)->a.counter), (n)))
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/**
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* local_add_unless - add unless the number is a given value
|
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* @l: pointer of type local_t
|
||||
* @a: the amount to add to l...
|
||||
* @u: ...unless l is equal to u.
|
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*
|
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* Atomically adds @a to @l, so long as it was not @u.
|
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* Returns non-zero if @l was not @u, and zero otherwise.
|
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*/
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#define local_add_unless(l, a, u) \
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({ \
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long c, old; \
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c = local_read(l); \
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for (;;) { \
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if (unlikely(c == (u))) \
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break; \
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old = local_cmpxchg((l), c, c + (a)); \
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if (likely(old == c)) \
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break; \
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c = old; \
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} \
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c != (u); \
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})
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#define local_inc_not_zero(l) local_add_unless((l), 1, 0)
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/* On x86, these are no better than the atomic variants. */
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#define __local_inc(l) local_inc(l)
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#define __local_dec(l) local_dec(l)
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#define __local_add(i,l) local_add((i),(l))
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#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.
|
||||
*/
|
||||
|
||||
/* 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) \
|
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({ local_t res__; \
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preempt_disable(); \
|
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res__ = (l); \
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preempt_enable(); \
|
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res__; })
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#define cpu_local_wrap(l) \
|
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({ preempt_disable(); \
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l; \
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preempt_enable(); }) \
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#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
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#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
|
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#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
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#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
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#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
|
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#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
|
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|
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#define __cpu_local_inc(l) cpu_local_inc(l)
|
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#define __cpu_local_dec(l) cpu_local_dec(l)
|
||||
#define __cpu_local_add(i, l) cpu_local_add((i), (l))
|
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#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
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|
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#endif /* _ARCH_I386_LOCAL_H */
|
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|
|
@ -1,207 +0,0 @@
|
|||
#ifndef _ARCH_X8664_LOCAL_H
|
||||
#define _ARCH_X8664_LOCAL_H
|
||||
|
||||
static inline void local_inc(local_t *l)
|
||||
{
|
||||
__asm__ __volatile__(
|
||||
_ASM_INC "%0"
|
||||
:"+m" (l->a.counter));
|
||||
}
|
||||
|
||||
static inline void local_dec(local_t *l)
|
||||
{
|
||||
__asm__ __volatile__(
|
||||
_ASM_DEC "%0"
|
||||
:"+m" (l->a.counter));
|
||||
}
|
||||
|
||||
static inline void local_add(long i, local_t *l)
|
||||
{
|
||||
__asm__ __volatile__(
|
||||
_ASM_ADD "%1,%0"
|
||||
:"+m" (l->a.counter)
|
||||
:"ir" (i));
|
||||
}
|
||||
|
||||
static inline void local_sub(long i, local_t *l)
|
||||
{
|
||||
__asm__ __volatile__(
|
||||
_ASM_SUB "%1,%0"
|
||||
:"+m" (l->a.counter)
|
||||
:"ir" (i));
|
||||
}
|
||||
|
||||
/**
|
||||
* local_sub_and_test - subtract value from variable and test result
|
||||
* @i: integer value to subtract
|
||||
* @l: pointer to type local_t
|
||||
*
|
||||
* Atomically subtracts @i from @l and returns
|
||||
* true if the result is zero, or false for all
|
||||
* other cases.
|
||||
*/
|
||||
static inline int local_sub_and_test(long i, local_t *l)
|
||||
{
|
||||
unsigned char c;
|
||||
|
||||
__asm__ __volatile__(
|
||||
_ASM_SUB "%2,%0; sete %1"
|
||||
:"+m" (l->a.counter), "=qm" (c)
|
||||
:"ir" (i) : "memory");
|
||||
return c;
|
||||
}
|
||||
|
||||
/**
|
||||
* local_dec_and_test - decrement and test
|
||||
* @l: pointer to type local_t
|
||||
*
|
||||
* Atomically decrements @l by 1 and
|
||||
* returns true if the result is 0, or false for all other
|
||||
* cases.
|
||||
*/
|
||||
static inline int local_dec_and_test(local_t *l)
|
||||
{
|
||||
unsigned char c;
|
||||
|
||||
__asm__ __volatile__(
|
||||
_ASM_DEC "%0; sete %1"
|
||||
:"+m" (l->a.counter), "=qm" (c)
|
||||
: : "memory");
|
||||
return c != 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* local_inc_and_test - increment and test
|
||||
* @l: pointer to type local_t
|
||||
*
|
||||
* Atomically increments @l by 1
|
||||
* and returns true if the result is zero, or false for all
|
||||
* other cases.
|
||||
*/
|
||||
static inline int local_inc_and_test(local_t *l)
|
||||
{
|
||||
unsigned char c;
|
||||
|
||||
__asm__ __volatile__(
|
||||
_ASM_INC "%0; sete %1"
|
||||
:"+m" (l->a.counter), "=qm" (c)
|
||||
: : "memory");
|
||||
return c != 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* local_add_negative - add and test if negative
|
||||
* @i: integer value to add
|
||||
* @l: pointer to type local_t
|
||||
*
|
||||
* Atomically adds @i to @l and returns true
|
||||
* if the result is negative, or false when
|
||||
* result is greater than or equal to zero.
|
||||
*/
|
||||
static inline int local_add_negative(long i, local_t *l)
|
||||
{
|
||||
unsigned char c;
|
||||
|
||||
__asm__ __volatile__(
|
||||
_ASM_ADD "%2,%0; sets %1"
|
||||
:"+m" (l->a.counter), "=qm" (c)
|
||||
:"ir" (i) : "memory");
|
||||
return c;
|
||||
}
|
||||
|
||||
/**
|
||||
* local_add_return - add and return
|
||||
* @i: integer value to add
|
||||
* @l: pointer to type local_t
|
||||
*
|
||||
* Atomically adds @i to @l and returns @i + @l
|
||||
*/
|
||||
static inline long local_add_return(long i, local_t *l)
|
||||
{
|
||||
long __i = i;
|
||||
__asm__ __volatile__(
|
||||
_ASM_XADD "%0, %1;"
|
||||
:"+r" (i), "+m" (l->a.counter)
|
||||
: : "memory");
|
||||
return i + __i;
|
||||
}
|
||||
|
||||
static inline long local_sub_return(long i, local_t *l)
|
||||
{
|
||||
return local_add_return(-i,l);
|
||||
}
|
||||
|
||||
#define local_inc_return(l) (local_add_return(1,l))
|
||||
#define local_dec_return(l) (local_sub_return(1,l))
|
||||
|
||||
#define local_cmpxchg(l, o, n) \
|
||||
(cmpxchg_local(&((l)->a.counter), (o), (n)))
|
||||
/* Always has a lock prefix */
|
||||
#define local_xchg(l, n) (xchg(&((l)->a.counter), (n)))
|
||||
|
||||
/**
|
||||
* atomic_up_add_unless - add unless the number is a given value
|
||||
* @l: pointer of type local_t
|
||||
* @a: the amount to add to l...
|
||||
* @u: ...unless l is equal to u.
|
||||
*
|
||||
* Atomically adds @a to @l, so long as it was not @u.
|
||||
* Returns non-zero if @l was not @u, and zero otherwise.
|
||||
*/
|
||||
#define local_add_unless(l, a, u) \
|
||||
({ \
|
||||
long c, old; \
|
||||
c = local_read(l); \
|
||||
for (;;) { \
|
||||
if (unlikely(c == (u))) \
|
||||
break; \
|
||||
old = local_cmpxchg((l), c, c + (a)); \
|
||||
if (likely(old == c)) \
|
||||
break; \
|
||||
c = old; \
|
||||
} \
|
||||
c != (u); \
|
||||
})
|
||||
#define local_inc_not_zero(l) local_add_unless((l), 1, 0)
|
||||
|
||||
/* On x86-64 these are better than the atomic variants on SMP kernels
|
||||
because they dont use a lock prefix. */
|
||||
#define __local_inc(l) local_inc(l)
|
||||
#define __local_dec(l) local_dec(l)
|
||||
#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.
|
||||
*
|
||||
* 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 /* _ARCH_X8664_LOCAL_H */
|
||||
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