[PATCH 06/18] xfs: convert pag_ici_lock to a spin lock

[Alex Elder]

On Tue, 2010-09-14 at 20:56 +1000, Dave Chinner wrote:
> From: Dave Chinner <dchinner at redhat.com>
> 
> 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.

This is of course contingent on the correctness of
the RCU change before this.  But this one looks good.

Reviewed-by: Alex Elder <aelder at sgi.com>


> Signed-off-by: Dave Chinner <dchinner at redhat.com>
> ---
>  fs/xfs/linux-2.6/xfs_sync.c |   16 ++++++++--------