diff options
| author | Nick Piggin <npiggin@suse.de> | 2007-11-26 14:58:10 -0600 |
|---|---|---|
| committer | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2008-01-03 13:11:44 -0600 |
| commit | 54af6233d1cb84cdfaa6ea44ea0db0bcf518baac (patch) | |
| tree | 031f07f853e18e2fe09b054a3a8e432424362e60 /drivers/char/drm/via_video.c | |
| parent | 67e6682f18b3bf812a994ae027ff87174a297ae8 (diff) | |
JFS is missing a memory barrier
JFS is missing a memory barrier needed to close the critical section before
clearing the lock bit. Use lock bitops for this.
unlock_page() has a second barrier after clearing the lock, which is
required because it checks whether the waitqueue is active without locks.
Such a barrier is not required here because the waitqueue spinlock is
always taken (something to think about if performance is an issue).
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Diffstat (limited to 'drivers/char/drm/via_video.c')
0 files changed, 0 insertions, 0 deletions