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authorDave Chinner <dchinner@redhat.com>2010-12-16 17:08:41 +1100
committerDave Chinner <david@fromorbit.com>2010-12-16 17:08:41 +1100
commit1a427ab0c1b205d1bda8da0b77ea9d295ac23c57 (patch)
treedc0fffd22282d0da29da43b3ebdeed7c3f5fac1d /fs/xfs/linux-2.6
parent1a3e8f3da09c7082d25b512a0ffe569391e4c09a (diff)
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xfs: convert pag_ici_lock to a spin lock
now that we are using RCU protection for the inode cache lookups, the lock is only needed on the modification side. Hence it is not necessary for the lock to be a rwlock as there are no read side holders anymore. Convert it to a spin lock to reflect it's exclusive nature. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/linux-2.6')
-rw-r--r--fs/xfs/linux-2.6/xfs_sync.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c
index fd38682da851..a02480de9759 100644
--- a/fs/xfs/linux-2.6/xfs_sync.c
+++ b/fs/xfs/linux-2.6/xfs_sync.c
@@ -620,12 +620,12 @@ xfs_inode_set_reclaim_tag(
struct xfs_perag *pag;
pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
- write_lock(&pag->pag_ici_lock);
+ spin_lock(&pag->pag_ici_lock);
spin_lock(&ip->i_flags_lock);
__xfs_inode_set_reclaim_tag(pag, ip);
__xfs_iflags_set(ip, XFS_IRECLAIMABLE);
spin_unlock(&ip->i_flags_lock);
- write_unlock(&pag->pag_ici_lock);
+ spin_unlock(&pag->pag_ici_lock);
xfs_perag_put(pag);
}
@@ -833,12 +833,12 @@ reclaim:
* added to the tree assert that it's been there before to catch
* problems with the inode life time early on.
*/
- write_lock(&pag->pag_ici_lock);
+ spin_lock(&pag->pag_ici_lock);
if (!radix_tree_delete(&pag->pag_ici_root,
XFS_INO_TO_AGINO(ip->i_mount, ip->i_ino)))
ASSERT(0);
__xfs_inode_clear_reclaim(pag, ip);
- write_unlock(&pag->pag_ici_lock);
+ spin_unlock(&pag->pag_ici_lock);
/*
* Here we do an (almost) spurious inode lock in order to coordinate