| commit | 5ede972df1cd9294c82e9515949fd2103be81d7b | [log] [tgz] |
|---|---|---|
| author | Michel Lespinasse <walken@google.com> | Tue May 07 06:45:55 2013 -0700 |
| committer | Linus Torvalds <torvalds@linux-foundation.org> | Tue May 07 07:20:16 2013 -0700 |
| tree | 2c6df4c16fbe4430ea2723f2aec284105aab08db | |
| parent | ed00f64346631dff035adfb9b0240daaa8b46c4e [diff] |
rwsem: use cmpxchg for trying to steal write lock Using rwsem_atomic_update to try stealing the write lock forced us to undo the adjustment in the failure path. We can have simpler and faster code by using cmpxchg instead. Signed-off-by: Michel Lespinasse <walken@google.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Acked-by: Davidlohr Bueso <davidlohr.bueso@hp.com> Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>