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| author | Christoph Hellwig <hch@infradead.org> | 2010-06-03 10:22:29 +0400 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2010-06-03 10:22:29 +0400 |
| commit | f9369729496a0f4c607a4cc1ea4dfeddbbfc505a (patch) | |
| tree | 05d463cd3c40514f09c01553cfd40ea3ea784f37 /fs | |
| parent | 070ecdca54dde9577d2697088e74e45568f48efb (diff) | |
| download | linux-f9369729496a0f4c607a4cc1ea4dfeddbbfc505a.tar.xz | |
xfs: improve xfs_isilocked
Use rwsem_is_locked to make the assertations for shared locks work.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/xfs_iget.c | 26 |
1 files changed, 10 insertions, 16 deletions
diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index f44a367907a8..75df75f43d48 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -741,30 +741,24 @@ xfs_ilock_demote( } #ifdef DEBUG -/* - * Debug-only routine, without additional rw_semaphore APIs, we can - * now only answer requests regarding whether we hold the lock for write - * (reader state is outside our visibility, we only track writer state). - * - * Note: this means !xfs_isilocked would give false positives, so don't do that. - */ int xfs_isilocked( xfs_inode_t *ip, uint lock_flags) { - if ((lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) == - XFS_ILOCK_EXCL) { - if (!ip->i_lock.mr_writer) - return 0; + if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) { + if (!(lock_flags & XFS_ILOCK_SHARED)) + return !!ip->i_lock.mr_writer; + return rwsem_is_locked(&ip->i_lock.mr_lock); } - if ((lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) == - XFS_IOLOCK_EXCL) { - if (!ip->i_iolock.mr_writer) - return 0; + if (lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) { + if (!(lock_flags & XFS_IOLOCK_SHARED)) + return !!ip->i_iolock.mr_writer; + return rwsem_is_locked(&ip->i_iolock.mr_lock); } - return 1; + ASSERT(0); + return 0; } #endif |