diff options
| author | Will Deacon <will.deacon@arm.com> | 2013-01-24 14:47:38 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-01-28 14:13:05 +0000 |
| commit | 20e260b6f4f717c100620122f626a2c06a4cfd72 (patch) | |
| tree | b2f0c8c70f86ae41f742604b4eb6c08d75109595 /arch/arm/include/asm/outercache.h | |
| parent | 0a301110b7bd33ef10164c184fe2c1d8c4c3ab6b (diff) | |
ARM: 7632/1: spinlock: avoid exclusive accesses on unlock() path
When unlocking a spinlock, all we need to do is increment the owner
field of the lock. Since only one CPU can be performing an unlock()
operation for a given lock, this doesn't need to be exclusive.
This patch simplifies arch_spin_unlock to use non-exclusive accesses
when updating the owner field of the lock.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/outercache.h')
0 files changed, 0 insertions, 0 deletions