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authorCatalin Marinas <catalin.marinas@arm.com>2006-05-19 16:55:35 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-05-19 16:55:35 -0400
commitc2a4c40651e08e465d3a6130bd9f6dcc1ce21d83 (patch)
treee8cc87fa6e0afad219b82655df183a3412a2f1d3 /include
parentec64152fee25e2a63f06d40d32c7b4cb62eab9a3 (diff)
[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>
Diffstat (limited to 'include')
-rw-r--r--include/asm-arm/spinlock.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/asm-arm/spinlock.h b/include/asm-arm/spinlock.h
index 43ad4e55878c..406ca97a8ab2 100644
--- a/include/asm-arm/spinlock.h
+++ b/include/asm-arm/spinlock.h
@@ -142,6 +142,9 @@ static inline void __raw_write_unlock(raw_rwlock_t *rw)
142 : "cc"); 142 : "cc");
143} 143}
144 144
145/* write_can_lock - would write_trylock() succeed? */
146#define __raw_write_can_lock(x) ((x)->lock == 0x80000000)
147
145/* 148/*
146 * Read locks are a bit more hairy: 149 * Read locks are a bit more hairy:
147 * - Exclusively load the lock value. 150 * - Exclusively load the lock value.
@@ -198,4 +201,7 @@ static inline void __raw_read_unlock(raw_rwlock_t *rw)
198 201
199#define __raw_read_trylock(lock) generic__raw_read_trylock(lock) 202#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
200 203
204/* read_can_lock - would read_trylock() succeed? */
205#define __raw_read_can_lock(x) ((x)->lock < 0x80000000)
206
201#endif /* __ASM_SPINLOCK_H */ 207#endif /* __ASM_SPINLOCK_H */