dm: simplify dm_io access in dm_split_and_process_bio

Use local variable instead of redudant access using ci.io

Signed-off-by: Mike Snitzer <snitzer@kernel.org>

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 82c1636..7135759 100644 (file)
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1565,10 +1565,12 @@ static void dm_split_and_process_bio(struct mapped_device *md,
                                     struct dm_table *map, struct bio *bio)
 {
        struct clone_info ci;
+       struct dm_io *io;
        struct bio *orig_bio = NULL;
        blk_status_t error = BLK_STS_OK;
 
        init_clone_info(&ci, md, map, bio);
+       io = ci.io;
 
        if (bio->bi_opf & REQ_PREFLUSH) {
                __send_empty_flush(&ci);
@@ -1577,14 +1579,14 @@ static void dm_split_and_process_bio(struct mapped_device *md,
        }
 
        error = __split_and_process_bio(&ci);
-       ci.io->map_task = NULL;
+       io->map_task = NULL;
        if (error || !ci.sector_count)
                goto out;
 
        /*
         * Remainder must be passed to submit_bio_noacct() so it gets handled
         * *after* bios already submitted have been completely processed.
-        * We take a clone of the original to store in ci.io->orig_bio to be
+        * We take a clone of the original to store in io->orig_bio to be
         * used by dm_end_io_acct() and for dm_io_complete() to use for
         * completion handling.
         */
@@ -1596,9 +1598,9 @@ static void dm_split_and_process_bio(struct mapped_device *md,
 out:
        if (!orig_bio)
                orig_bio = bio;
-       smp_store_release(&ci.io->orig_bio, orig_bio);
-       if (dm_io_flagged(ci.io, DM_IO_START_ACCT))
-               dm_start_io_acct(ci.io, NULL);
+       smp_store_release(&io->orig_bio, orig_bio);
+       if (dm_io_flagged(io, DM_IO_START_ACCT))
+               dm_start_io_acct(io, NULL);
 
        /*
         * Drop the extra reference count for non-POLLED bio, and hold one
@@ -1610,7 +1612,7 @@ out:
        if (error || !ci.submit_as_polled)
                dm_io_dec_pending(ci.io, error);
        else
-               dm_queue_poll_io(bio, ci.io);
+               dm_queue_poll_io(bio, io);
 }
 
 static void dm_submit_bio(struct bio *bio)