xfs: convert AIL cursors to use struct list_head
authorDave Chinner <dchinner@redhat.com>
Mon, 18 Jul 2011 03:40:18 +0000 (03:40 +0000)
committerAlex Elder <aelder@sgi.com>
Wed, 20 Jul 2011 23:37:46 +0000 (18:37 -0500)
commitaf3e40228fb2dbc18d94fbd5103f07344a720ae7
treee33bac82ebcf5fccf7f3d25cb8dc9b764736fc06
parent16b5902943c793e632cf8c9526619f59893bdc29
xfs: convert AIL cursors to use struct list_head

The list of active AIL cursors uses a roll-your-own linked list with
special casing for the AIL push cursor. Simplify this code by
replacing the list with standard struct list_head lists, and use a
separate list_head to track the active cursors. This allows us to
treat the AIL push cursor as a generic cursor rather than as a
special case, further simplifying the code.

Further, fix the duplicate push cursor initialisation that the
special case handling was hiding, and clean up all the comments
around the active cursor list handling.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
fs/xfs/xfs_trans_ail.c
fs/xfs/xfs_trans_priv.h