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[ARM] 5067/1: _raw_write_can_lock macro bugfix 

The current __raw_write_can_lock macro tests whether the lock can be
locked by checking if it is equal to 0x80000000, whereas the lock
should be lockable if its value is 0 i.e. unlocked state is
represented by 0. Hence the macro should test the value of lock
against 0 and not 0x80000000.

Signed-off-by: Surinder Pal Singh <srplsnh@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
surinder 2008-05-28 09:51:16 +01:00 committed by Russell King
parent ea6a7404da
commit 1e5c594607
1 changed files with 1 additions and 1 deletions
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2
include/asm-arm/spinlock.h
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@ -142,7 +142,7 @@ static inline void __raw_write_unlock(raw_rwlock_t *rw)
}
/* write_can_lock - would write_trylock() succeed? */
#define __raw_write_can_lock(x) ((x)->lock == 0x80000000)
#define __raw_write_can_lock(x) ((x)->lock == 0)
/*
* Read locks are a bit more hairy: