From 3e6053d76dcbd92b2f9f4ad5ece9bce83149523e Mon Sep 17 00:00:00 2001 From: Hugh Dickins Date: Thu, 11 Sep 2008 10:57:55 +0200 Subject: 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 Signed-off-by: Jens Axboe --- block/blk-barrier.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'block') diff --git a/block/blk-barrier.c b/block/blk-barrier.c index 988b63479b2..5c99ff8d2db 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; -- cgit v1.2.3