875d43e72b
Start cleaning 32-bit vs. 64-bit configuration. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
653 lines
15 KiB
C
653 lines
15 KiB
C
/*
|
|
* Atomic operations that C can't guarantee us. Useful for
|
|
* resource counting etc..
|
|
*
|
|
* But use these as seldom as possible since they are much more slower
|
|
* than regular operations.
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1996, 97, 99, 2000, 03, 04 by Ralf Baechle
|
|
*/
|
|
|
|
/*
|
|
* As workaround for the ATOMIC_DEC_AND_LOCK / atomic_dec_and_lock mess in
|
|
* <linux/spinlock.h> we have to include <linux/spinlock.h> outside the
|
|
* main big wrapper ...
|
|
*/
|
|
#include <linux/config.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#ifndef _ASM_ATOMIC_H
|
|
#define _ASM_ATOMIC_H
|
|
|
|
#include <asm/cpu-features.h>
|
|
#include <asm/war.h>
|
|
|
|
extern spinlock_t atomic_lock;
|
|
|
|
typedef struct { volatile int counter; } atomic_t;
|
|
|
|
#define ATOMIC_INIT(i) { (i) }
|
|
|
|
/*
|
|
* atomic_read - read atomic variable
|
|
* @v: pointer of type atomic_t
|
|
*
|
|
* Atomically reads the value of @v.
|
|
*/
|
|
#define atomic_read(v) ((v)->counter)
|
|
|
|
/*
|
|
* atomic_set - set atomic variable
|
|
* @v: pointer of type atomic_t
|
|
* @i: required value
|
|
*
|
|
* Atomically sets the value of @v to @i.
|
|
*/
|
|
#define atomic_set(v,i) ((v)->counter = (i))
|
|
|
|
/*
|
|
* atomic_add - add integer to atomic variable
|
|
* @i: integer value to add
|
|
* @v: pointer of type atomic_t
|
|
*
|
|
* Atomically adds @i to @v.
|
|
*/
|
|
static __inline__ void atomic_add(int i, atomic_t * v)
|
|
{
|
|
if (cpu_has_llsc && R10000_LLSC_WAR) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: ll %0, %1 # atomic_add \n"
|
|
" addu %0, %2 \n"
|
|
" sc %0, %1 \n"
|
|
" beqzl %0, 1b \n"
|
|
: "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter));
|
|
} else if (cpu_has_llsc) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: ll %0, %1 # atomic_add \n"
|
|
" addu %0, %2 \n"
|
|
" sc %0, %1 \n"
|
|
" beqz %0, 1b \n"
|
|
: "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter));
|
|
} else {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&atomic_lock, flags);
|
|
v->counter += i;
|
|
spin_unlock_irqrestore(&atomic_lock, flags);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* atomic_sub - subtract the atomic variable
|
|
* @i: integer value to subtract
|
|
* @v: pointer of type atomic_t
|
|
*
|
|
* Atomically subtracts @i from @v.
|
|
*/
|
|
static __inline__ void atomic_sub(int i, atomic_t * v)
|
|
{
|
|
if (cpu_has_llsc && R10000_LLSC_WAR) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: ll %0, %1 # atomic_sub \n"
|
|
" subu %0, %2 \n"
|
|
" sc %0, %1 \n"
|
|
" beqzl %0, 1b \n"
|
|
: "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter));
|
|
} else if (cpu_has_llsc) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: ll %0, %1 # atomic_sub \n"
|
|
" subu %0, %2 \n"
|
|
" sc %0, %1 \n"
|
|
" beqz %0, 1b \n"
|
|
: "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter));
|
|
} else {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&atomic_lock, flags);
|
|
v->counter -= i;
|
|
spin_unlock_irqrestore(&atomic_lock, flags);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Same as above, but return the result value
|
|
*/
|
|
static __inline__ int atomic_add_return(int i, atomic_t * v)
|
|
{
|
|
unsigned long result;
|
|
|
|
if (cpu_has_llsc && R10000_LLSC_WAR) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: ll %1, %2 # atomic_add_return \n"
|
|
" addu %0, %1, %3 \n"
|
|
" sc %0, %2 \n"
|
|
" beqzl %0, 1b \n"
|
|
" addu %0, %1, %3 \n"
|
|
" sync \n"
|
|
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter)
|
|
: "memory");
|
|
} else if (cpu_has_llsc) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: ll %1, %2 # atomic_add_return \n"
|
|
" addu %0, %1, %3 \n"
|
|
" sc %0, %2 \n"
|
|
" beqz %0, 1b \n"
|
|
" addu %0, %1, %3 \n"
|
|
" sync \n"
|
|
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter)
|
|
: "memory");
|
|
} else {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&atomic_lock, flags);
|
|
result = v->counter;
|
|
result += i;
|
|
v->counter = result;
|
|
spin_unlock_irqrestore(&atomic_lock, flags);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static __inline__ int atomic_sub_return(int i, atomic_t * v)
|
|
{
|
|
unsigned long result;
|
|
|
|
if (cpu_has_llsc && R10000_LLSC_WAR) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: ll %1, %2 # atomic_sub_return \n"
|
|
" subu %0, %1, %3 \n"
|
|
" sc %0, %2 \n"
|
|
" beqzl %0, 1b \n"
|
|
" subu %0, %1, %3 \n"
|
|
" sync \n"
|
|
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter)
|
|
: "memory");
|
|
} else if (cpu_has_llsc) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: ll %1, %2 # atomic_sub_return \n"
|
|
" subu %0, %1, %3 \n"
|
|
" sc %0, %2 \n"
|
|
" beqz %0, 1b \n"
|
|
" subu %0, %1, %3 \n"
|
|
" sync \n"
|
|
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter)
|
|
: "memory");
|
|
} else {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&atomic_lock, flags);
|
|
result = v->counter;
|
|
result -= i;
|
|
v->counter = result;
|
|
spin_unlock_irqrestore(&atomic_lock, flags);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* atomic_sub_if_positive - add integer to atomic variable
|
|
* @v: pointer of type atomic_t
|
|
*
|
|
* Atomically test @v and decrement if it is greater than 0.
|
|
* The function returns the old value of @v minus 1.
|
|
*/
|
|
static __inline__ int atomic_sub_if_positive(int i, atomic_t * v)
|
|
{
|
|
unsigned long result;
|
|
|
|
if (cpu_has_llsc && R10000_LLSC_WAR) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: ll %1, %2 # atomic_sub_if_positive\n"
|
|
" subu %0, %1, %3 \n"
|
|
" bltz %0, 1f \n"
|
|
" sc %0, %2 \n"
|
|
" beqzl %0, 1b \n"
|
|
" sync \n"
|
|
"1: \n"
|
|
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter)
|
|
: "memory");
|
|
} else if (cpu_has_llsc) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: ll %1, %2 # atomic_sub_if_positive\n"
|
|
" subu %0, %1, %3 \n"
|
|
" bltz %0, 1f \n"
|
|
" sc %0, %2 \n"
|
|
" beqz %0, 1b \n"
|
|
" sync \n"
|
|
"1: \n"
|
|
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter)
|
|
: "memory");
|
|
} else {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&atomic_lock, flags);
|
|
result = v->counter;
|
|
result -= i;
|
|
if (result >= 0)
|
|
v->counter = result;
|
|
spin_unlock_irqrestore(&atomic_lock, flags);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#define atomic_dec_return(v) atomic_sub_return(1,(v))
|
|
#define atomic_inc_return(v) atomic_add_return(1,(v))
|
|
|
|
/*
|
|
* atomic_sub_and_test - subtract value from variable and test result
|
|
* @i: integer value to subtract
|
|
* @v: pointer of type atomic_t
|
|
*
|
|
* Atomically subtracts @i from @v and returns
|
|
* true if the result is zero, or false for all
|
|
* other cases.
|
|
*/
|
|
#define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0)
|
|
|
|
/*
|
|
* atomic_inc_and_test - increment and test
|
|
* @v: pointer of type atomic_t
|
|
*
|
|
* Atomically increments @v by 1
|
|
* and returns true if the result is zero, or false for all
|
|
* other cases.
|
|
*/
|
|
#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
|
|
|
|
/*
|
|
* atomic_dec_and_test - decrement by 1 and test
|
|
* @v: pointer of type atomic_t
|
|
*
|
|
* Atomically decrements @v by 1 and
|
|
* returns true if the result is 0, or false for all other
|
|
* cases.
|
|
*/
|
|
#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)
|
|
|
|
/*
|
|
* atomic_dec_if_positive - decrement by 1 if old value positive
|
|
* @v: pointer of type atomic_t
|
|
*/
|
|
#define atomic_dec_if_positive(v) atomic_sub_if_positive(1, v)
|
|
|
|
/*
|
|
* atomic_inc - increment atomic variable
|
|
* @v: pointer of type atomic_t
|
|
*
|
|
* Atomically increments @v by 1.
|
|
*/
|
|
#define atomic_inc(v) atomic_add(1,(v))
|
|
|
|
/*
|
|
* atomic_dec - decrement and test
|
|
* @v: pointer of type atomic_t
|
|
*
|
|
* Atomically decrements @v by 1.
|
|
*/
|
|
#define atomic_dec(v) atomic_sub(1,(v))
|
|
|
|
/*
|
|
* atomic_add_negative - add and test if negative
|
|
* @v: pointer of type atomic_t
|
|
* @i: integer value to add
|
|
*
|
|
* Atomically adds @i to @v and returns true
|
|
* if the result is negative, or false when
|
|
* result is greater than or equal to zero.
|
|
*/
|
|
#define atomic_add_negative(i,v) (atomic_add_return(i, (v)) < 0)
|
|
|
|
#ifdef CONFIG_64BIT
|
|
|
|
typedef struct { volatile __s64 counter; } atomic64_t;
|
|
|
|
#define ATOMIC64_INIT(i) { (i) }
|
|
|
|
/*
|
|
* atomic64_read - read atomic variable
|
|
* @v: pointer of type atomic64_t
|
|
*
|
|
*/
|
|
#define atomic64_read(v) ((v)->counter)
|
|
|
|
/*
|
|
* atomic64_set - set atomic variable
|
|
* @v: pointer of type atomic64_t
|
|
* @i: required value
|
|
*/
|
|
#define atomic64_set(v,i) ((v)->counter = (i))
|
|
|
|
/*
|
|
* atomic64_add - add integer to atomic variable
|
|
* @i: integer value to add
|
|
* @v: pointer of type atomic64_t
|
|
*
|
|
* Atomically adds @i to @v.
|
|
*/
|
|
static __inline__ void atomic64_add(long i, atomic64_t * v)
|
|
{
|
|
if (cpu_has_llsc && R10000_LLSC_WAR) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: lld %0, %1 # atomic64_add \n"
|
|
" addu %0, %2 \n"
|
|
" scd %0, %1 \n"
|
|
" beqzl %0, 1b \n"
|
|
: "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter));
|
|
} else if (cpu_has_llsc) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: lld %0, %1 # atomic64_add \n"
|
|
" addu %0, %2 \n"
|
|
" scd %0, %1 \n"
|
|
" beqz %0, 1b \n"
|
|
: "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter));
|
|
} else {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&atomic_lock, flags);
|
|
v->counter += i;
|
|
spin_unlock_irqrestore(&atomic_lock, flags);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* atomic64_sub - subtract the atomic variable
|
|
* @i: integer value to subtract
|
|
* @v: pointer of type atomic64_t
|
|
*
|
|
* Atomically subtracts @i from @v.
|
|
*/
|
|
static __inline__ void atomic64_sub(long i, atomic64_t * v)
|
|
{
|
|
if (cpu_has_llsc && R10000_LLSC_WAR) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: lld %0, %1 # atomic64_sub \n"
|
|
" subu %0, %2 \n"
|
|
" scd %0, %1 \n"
|
|
" beqzl %0, 1b \n"
|
|
: "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter));
|
|
} else if (cpu_has_llsc) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: lld %0, %1 # atomic64_sub \n"
|
|
" subu %0, %2 \n"
|
|
" scd %0, %1 \n"
|
|
" beqz %0, 1b \n"
|
|
: "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter));
|
|
} else {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&atomic_lock, flags);
|
|
v->counter -= i;
|
|
spin_unlock_irqrestore(&atomic_lock, flags);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Same as above, but return the result value
|
|
*/
|
|
static __inline__ long atomic64_add_return(long i, atomic64_t * v)
|
|
{
|
|
unsigned long result;
|
|
|
|
if (cpu_has_llsc && R10000_LLSC_WAR) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: lld %1, %2 # atomic64_add_return \n"
|
|
" addu %0, %1, %3 \n"
|
|
" scd %0, %2 \n"
|
|
" beqzl %0, 1b \n"
|
|
" addu %0, %1, %3 \n"
|
|
" sync \n"
|
|
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter)
|
|
: "memory");
|
|
} else if (cpu_has_llsc) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: lld %1, %2 # atomic64_add_return \n"
|
|
" addu %0, %1, %3 \n"
|
|
" scd %0, %2 \n"
|
|
" beqz %0, 1b \n"
|
|
" addu %0, %1, %3 \n"
|
|
" sync \n"
|
|
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter)
|
|
: "memory");
|
|
} else {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&atomic_lock, flags);
|
|
result = v->counter;
|
|
result += i;
|
|
v->counter = result;
|
|
spin_unlock_irqrestore(&atomic_lock, flags);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static __inline__ long atomic64_sub_return(long i, atomic64_t * v)
|
|
{
|
|
unsigned long result;
|
|
|
|
if (cpu_has_llsc && R10000_LLSC_WAR) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: lld %1, %2 # atomic64_sub_return \n"
|
|
" subu %0, %1, %3 \n"
|
|
" scd %0, %2 \n"
|
|
" beqzl %0, 1b \n"
|
|
" subu %0, %1, %3 \n"
|
|
" sync \n"
|
|
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter)
|
|
: "memory");
|
|
} else if (cpu_has_llsc) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: lld %1, %2 # atomic64_sub_return \n"
|
|
" subu %0, %1, %3 \n"
|
|
" scd %0, %2 \n"
|
|
" beqz %0, 1b \n"
|
|
" subu %0, %1, %3 \n"
|
|
" sync \n"
|
|
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter)
|
|
: "memory");
|
|
} else {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&atomic_lock, flags);
|
|
result = v->counter;
|
|
result -= i;
|
|
v->counter = result;
|
|
spin_unlock_irqrestore(&atomic_lock, flags);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* atomic64_sub_if_positive - add integer to atomic variable
|
|
* @v: pointer of type atomic64_t
|
|
*
|
|
* Atomically test @v and decrement if it is greater than 0.
|
|
* The function returns the old value of @v minus 1.
|
|
*/
|
|
static __inline__ long atomic64_sub_if_positive(long i, atomic64_t * v)
|
|
{
|
|
unsigned long result;
|
|
|
|
if (cpu_has_llsc && R10000_LLSC_WAR) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: lld %1, %2 # atomic64_sub_if_positive\n"
|
|
" dsubu %0, %1, %3 \n"
|
|
" bltz %0, 1f \n"
|
|
" scd %0, %2 \n"
|
|
" beqzl %0, 1b \n"
|
|
" sync \n"
|
|
"1: \n"
|
|
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter)
|
|
: "memory");
|
|
} else if (cpu_has_llsc) {
|
|
unsigned long temp;
|
|
|
|
__asm__ __volatile__(
|
|
"1: lld %1, %2 # atomic64_sub_if_positive\n"
|
|
" dsubu %0, %1, %3 \n"
|
|
" bltz %0, 1f \n"
|
|
" scd %0, %2 \n"
|
|
" beqz %0, 1b \n"
|
|
" sync \n"
|
|
"1: \n"
|
|
: "=&r" (result), "=&r" (temp), "=m" (v->counter)
|
|
: "Ir" (i), "m" (v->counter)
|
|
: "memory");
|
|
} else {
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&atomic_lock, flags);
|
|
result = v->counter;
|
|
result -= i;
|
|
if (result >= 0)
|
|
v->counter = result;
|
|
spin_unlock_irqrestore(&atomic_lock, flags);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#define atomic64_dec_return(v) atomic64_sub_return(1,(v))
|
|
#define atomic64_inc_return(v) atomic64_add_return(1,(v))
|
|
|
|
/*
|
|
* atomic64_sub_and_test - subtract value from variable and test result
|
|
* @i: integer value to subtract
|
|
* @v: pointer of type atomic64_t
|
|
*
|
|
* Atomically subtracts @i from @v and returns
|
|
* true if the result is zero, or false for all
|
|
* other cases.
|
|
*/
|
|
#define atomic64_sub_and_test(i,v) (atomic64_sub_return((i), (v)) == 0)
|
|
|
|
/*
|
|
* atomic64_inc_and_test - increment and test
|
|
* @v: pointer of type atomic64_t
|
|
*
|
|
* Atomically increments @v by 1
|
|
* and returns true if the result is zero, or false for all
|
|
* other cases.
|
|
*/
|
|
#define atomic64_inc_and_test(v) (atomic64_inc_return(v) == 0)
|
|
|
|
/*
|
|
* atomic64_dec_and_test - decrement by 1 and test
|
|
* @v: pointer of type atomic64_t
|
|
*
|
|
* Atomically decrements @v by 1 and
|
|
* returns true if the result is 0, or false for all other
|
|
* cases.
|
|
*/
|
|
#define atomic64_dec_and_test(v) (atomic64_sub_return(1, (v)) == 0)
|
|
|
|
/*
|
|
* atomic64_dec_if_positive - decrement by 1 if old value positive
|
|
* @v: pointer of type atomic64_t
|
|
*/
|
|
#define atomic64_dec_if_positive(v) atomic64_sub_if_positive(1, v)
|
|
|
|
/*
|
|
* atomic64_inc - increment atomic variable
|
|
* @v: pointer of type atomic64_t
|
|
*
|
|
* Atomically increments @v by 1.
|
|
*/
|
|
#define atomic64_inc(v) atomic64_add(1,(v))
|
|
|
|
/*
|
|
* atomic64_dec - decrement and test
|
|
* @v: pointer of type atomic64_t
|
|
*
|
|
* Atomically decrements @v by 1.
|
|
*/
|
|
#define atomic64_dec(v) atomic64_sub(1,(v))
|
|
|
|
/*
|
|
* atomic64_add_negative - add and test if negative
|
|
* @v: pointer of type atomic64_t
|
|
* @i: integer value to add
|
|
*
|
|
* Atomically adds @i to @v and returns true
|
|
* if the result is negative, or false when
|
|
* result is greater than or equal to zero.
|
|
*/
|
|
#define atomic64_add_negative(i,v) (atomic64_add_return(i, (v)) < 0)
|
|
|
|
#endif /* CONFIG_64BIT */
|
|
|
|
/*
|
|
* atomic*_return operations are serializing but not the non-*_return
|
|
* versions.
|
|
*/
|
|
#define smp_mb__before_atomic_dec() smp_mb()
|
|
#define smp_mb__after_atomic_dec() smp_mb()
|
|
#define smp_mb__before_atomic_inc() smp_mb()
|
|
#define smp_mb__after_atomic_inc() smp_mb()
|
|
|
|
#endif /* _ASM_ATOMIC_H */
|