diff options
| author |   Ingo Molnar <mingo@elte.hu> | 2006-07-03 00:25:02 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-03 15:27:06 -0700 |
| commit | d8aa905b429700e8b6b6b301a8ac2d4a24f2c19b (patch) | |
| tree | 7ba82a5ae7bb63fe45f404424a470c126e59e6da /fs | |
| parent | [PATCH] lockdep: enable on s390 (diff) | |
| download | linux-dev-d8aa905b429700e8b6b6b301a8ac2d4a24f2c19b.tar.xz linux-dev-d8aa905b429700e8b6b6b301a8ac2d4a24f2c19b.zip | |
[PATCH] lockdep: annotate direct io
Teach special (rwsem-in-irq) locking code to the lock validator. Has no
effect on non-lockdep kernels.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/direct-io.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/direct-io.c b/fs/direct-io.c index 538fb0418fba..5981e17f46f0 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -220,7 +220,8 @@ static void dio_complete(struct dio *dio, loff_t offset, ssize_t bytes) if (dio->end_io && dio->result) dio->end_io(dio->iocb, offset, bytes, dio->map_bh.b_private); if (dio->lock_type == DIO_LOCKING) - up_read(&dio->inode->i_alloc_sem); + /* lockdep: non-owner release */ + up_read_non_owner(&dio->inode->i_alloc_sem); } /* @@ -1261,7 +1262,8 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode, } if (dio_lock_type == DIO_LOCKING) - down_read(&inode->i_alloc_sem); + /* lockdep: not the owner will release it */ + down_read_non_owner(&inode->i_alloc_sem); } /* |