[ARM] 3533/1: Implement the __raw_(read|write)_can_lock functions on ARM
Patch from Catalin Marinas Recent patches introduced the write_can_lock() call in the kernel/ptrace.c file. Implement the __raw_* variants on ARM (SMP) as well. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
parent
ec64152fee
commit
c2a4c40651
|
@ -142,6 +142,9 @@ static inline void __raw_write_unlock(raw_rwlock_t *rw)
|
|||
: "cc");
|
||||
}
|
||||
|
||||
/* write_can_lock - would write_trylock() succeed? */
|
||||
#define __raw_write_can_lock(x) ((x)->lock == 0x80000000)
|
||||
|
||||
/*
|
||||
* Read locks are a bit more hairy:
|
||||
* - Exclusively load the lock value.
|
||||
|
@ -198,4 +201,7 @@ static inline void __raw_read_unlock(raw_rwlock_t *rw)
|
|||
|
||||
#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
|
||||
|
||||
/* read_can_lock - would read_trylock() succeed? */
|
||||
#define __raw_read_can_lock(x) ((x)->lock < 0x80000000)
|
||||
|
||||
#endif /* __ASM_SPINLOCK_H */
|
||||
|
|
Loading…
Reference in a new issue