| commit | 66657b318e0e443ada229fccd40c8be86cfebdbf | [log] [tgz] |
|---|---|---|
| author | Josef Bacik <jbacik@fusionio.com> | Wed Aug 01 15:36:24 2012 -0400 |
| committer | Chris Mason <chris.mason@oracle.com> | Tue Aug 28 16:53:33 2012 -0400 |
| tree | bf1334fff93556fbc8d82b26a6d5431fd9e74b5c | |
| parent | 1fa11e265fa2562fb713171b6a58e72bb7afd276 [diff] |
Btrfs: barrier before waitqueue_active We need a barrir before calling waitqueue_active otherwise we will miss wakeups. So in places that do atomic_dec(); then atomic_read() use atomic_dec_return() which imply a memory barrier (see memory-barriers.txt) and then add an explicit memory barrier everywhere else that need them. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>