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arm: Define test_and_set_bit and test_and_clear bit for ARM

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Needed for (e.g.) ubifs support to work.

Signed-off-by: Simon Kagstrom <simon.kagstrom@netinsight.net>
This commit is contained in:
Simon Kagstrom 2009-08-24 09:10:16 +02:00 committed by Tom Rix
parent c1d1bfa583
commit 85c735f9a5
1 changed files with 25 additions and 3 deletions
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28
include/asm-arm/bitops.h
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@ -17,6 +17,8 @@
#ifdef __KERNEL__
#include <asm/proc/system.h>
#define smp_mb__before_clear_bit() do { } while (0)
#define smp_mb__after_clear_bit() do { } while (0)
@ -37,8 +39,6 @@ static inline void __change_bit(int nr, volatile void *addr)
*p ^= mask;
}
extern int test_and_set_bit(int nr, volatile void * addr);
static inline int __test_and_set_bit(int nr, volatile void *addr)
{
unsigned long mask = BIT_MASK(nr);
@ -49,7 +49,17 @@ static inline int __test_and_set_bit(int nr, volatile void *addr)
return (old & mask) != 0;
}
extern int test_and_clear_bit(int nr, volatile void * addr);
static inline int test_and_set_bit(int nr, volatile void * addr)
{
unsigned long flags;
int out;
local_irq_save(flags);
out = __test_and_set_bit(nr, addr);
local_irq_restore(flags);
return out;
}
static inline int __test_and_clear_bit(int nr, volatile void *addr)
{
@ -61,6 +71,18 @@ static inline int __test_and_clear_bit(int nr, volatile void *addr)
return (old & mask) != 0;
}
static inline int test_and_clear_bit(int nr, volatile void * addr)
{
unsigned long flags;
int out;
local_irq_save(flags);
out = __test_and_clear_bit(nr, addr);
local_irq_restore(flags);
return out;
}
extern int test_and_change_bit(int nr, volatile void * addr);
static inline int __test_and_change_bit(int nr, volatile void *addr)