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authorHugh Dickins <hugh@veritas.com>2008-09-11 10:57:55 +0200
committerJens Axboe <jens.axboe@oracle.com>2008-10-09 08:56:17 +0200
commit3e6053d76dcbd92b2f9f4ad5ece9bce83149523e (patch)
tree0e7ab62872071c39e2475decb769b9715de75376 /block
parentsg: remove unnecessary blk_rq_unmap_user (diff)
downloadlinux-3e6053d76dcbd92b2f9f4ad5ece9bce83149523e.tar.xz
linux-3e6053d76dcbd92b2f9f4ad5ece9bce83149523e.zip
block: adjust blkdev_issue_discard for swap
Two mods to blkdev_issue_discard(), thinking ahead to its use on swap: 1. Add gfp_mask argument, so swap allocation can use it where GFP_KERNEL might deadlock but GFP_NOIO is safe. 2. Enlarge nr_sects argument from unsigned to sector_t: unsigned long is enough to cover a whole swap area, but sector_t suits any partition. Change sb_issue_discard()'s nr_blocks to sector_t too; but no need seen for a gfp_mask there, just pass GFP_KERNEL down to blkdev_issue_discard(). Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-barrier.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/block/blk-barrier.c b/block/blk-barrier.c
index 988b63479b2f..5c99ff8d2db8 100644
--- a/block/blk-barrier.c
+++ b/block/blk-barrier.c
@@ -332,12 +332,13 @@ static void blkdev_discard_end_io(struct bio *bio, int err)
* @bdev: blockdev to issue discard for
* @sector: start sector
* @nr_sects: number of sectors to discard
+ * @gfp_mask: memory allocation flags (for bio_alloc)
*
* Description:
* Issue a discard request for the sectors in question. Does not wait.
*/
-int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
- unsigned nr_sects)
+int blkdev_issue_discard(struct block_device *bdev,
+ sector_t sector, sector_t nr_sects, gfp_t gfp_mask)
{
struct request_queue *q;
struct bio *bio;
@@ -354,7 +355,7 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
return -EOPNOTSUPP;
while (nr_sects && !ret) {
- bio = bio_alloc(GFP_KERNEL, 0);
+ bio = bio_alloc(gfp_mask, 0);
if (!bio)
return -ENOMEM;