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xfs: convert pag_ici_lock to a spin lock

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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>
This commit is contained in:
Dave Chinner
2010-12-16 17:08:41 +11:00
committed by Dave Chinner
parent 1a3e8f3da0
commit 1a427ab0c1
4 changed files with 11 additions and 11 deletions
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2
fs/xfs/xfs_mount.c
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@@ -472,7 +472,7 @@ xfs_initialize_perag(
goto out_unwind;
pag->pag_agno = index;
pag->pag_mount = mp;
rwlock_init(&pag->pag_ici_lock);
spin_lock_init(&pag->pag_ici_lock);
mutex_init(&pag->pag_ici_reclaim_lock);
INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC);
spin_lock_init(&pag->pag_buf_lock);