dm: pass gfp_mask to alloc_rq_tio

This patch adds the gfp_mask argument to alloc_rq_tio().
No functional change.

This patch is a preparation for a later patch in this series which needs to
allocate tio (for barrier I/O) with different allocation flag (GFP_NOIO) from
the one in the normal I/O code path.

Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index cf0b455..a42dfb7 100644 (file)
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -432,9 +432,10 @@ static void free_tio(struct mapped_device *md, struct dm_target_io *tio)
        mempool_free(tio, md->tio_pool);
 }
 
-static struct dm_rq_target_io *alloc_rq_tio(struct mapped_device *md)
+static struct dm_rq_target_io *alloc_rq_tio(struct mapped_device *md,
+                                           gfp_t gfp_mask)
 {
-       return mempool_alloc(md->tio_pool, GFP_ATOMIC);
+       return mempool_alloc(md->tio_pool, gfp_mask);
 }
 
 static void free_rq_tio(struct dm_rq_target_io *tio)
@@ -1471,7 +1472,7 @@ static int dm_prep_fn(struct request_queue *q, struct request *rq)
                return BLKPREP_KILL;
        }
 
-       tio = alloc_rq_tio(md); /* Only one for each original request */
+       tio = alloc_rq_tio(md, GFP_ATOMIC);
        if (!tio)
                /* -ENOMEM */
                return BLKPREP_DEFER;