This can reduce the backporting efforts.

Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
---
 fs/f2fs/segment.c | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 0738f48293cc..ebfd5cd7619e 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -673,8 +673,8 @@ static void f2fs_submit_bio_wait_endio(struct bio *bio)
 static int __f2fs_issue_discard_async(struct f2fs_sb_info *sbi,
                struct block_device *bdev, block_t blkstart, block_t blklen)
 {
+       struct bio_entry *be;
        struct bio *bio = NULL;
-       int err;
 
        trace_f2fs_issue_discard(sbi->sb, blkstart, blklen);
 
@@ -683,20 +683,24 @@ static int __f2fs_issue_discard_async(struct f2fs_sb_info 
*sbi,
 
                blkstart -= FDEV(devi).start_blk;
        }
-       err = __blkdev_issue_discard(bdev,
-                               SECTOR_FROM_BLOCK(blkstart),
-                               SECTOR_FROM_BLOCK(blklen),
-                               GFP_NOFS, 0, &bio);
-       if (!err && bio) {
-               struct bio_entry *be = __add_bio_entry(sbi, bio);
 
-               bio->bi_private = be;
-               bio->bi_end_io = f2fs_submit_bio_wait_endio;
-               bio->bi_opf |= REQ_SYNC;
-               submit_bio(bio);
-       }
+       if (!blk_queue_discard(bdev_get_queue(bdev)))
+               return 0;
 
-       return err;
+       /* we always submit 4KB-aligned discard commands. */
+       bio = f2fs_bio_alloc(0);
+       bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blkstart);
+       bio->bi_bdev = bdev;
+       bio_set_op_attrs(bio, REQ_OP_DISCARD, 0);
+       bio->bi_iter.bi_size = SECTOR_FROM_BLOCK(blklen) << 9;
+       bio->bi_end_io = f2fs_submit_bio_wait_endio;
+
+       be = __add_bio_entry(sbi, bio);
+
+       bio->bi_private = be;
+       bio->bi_opf |= REQ_SYNC;
+       submit_bio(bio);
+       return 0;
 }
 
 #ifdef CONFIG_BLK_DEV_ZONED
-- 
2.11.0


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