| commit | 20e260b6f4f717c100620122f626a2c06a4cfd72 | [log] [tgz] |
|---|---|---|
| author | Will Deacon <will.deacon@arm.com> | Thu Jan 24 14:47:38 2013 +0100 |
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | Mon Jan 28 14:13:05 2013 +0000 |
| tree | b2f0c8c70f86ae41f742604b4eb6c08d75109595 | |
| 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>