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authorMike Snitzer <snitzer@redhat.com>2020-09-14 19:59:53 +0200
committerMike Snitzer <snitzer@redhat.com>2020-09-29 22:33:04 +0200
commit828678b87eff06a4fff1e13e8b107287d522ed30 (patch)
tree0c007f426f3577be9b193a4e8f94d2c4434fae42 /drivers/md/dm.c
parentdm: optimize max_io_len() by inlining max_io_len_target_boundary() (diff)
downloadlinux-828678b87eff06a4fff1e13e8b107287d522ed30.tar.xz
linux-828678b87eff06a4fff1e13e8b107287d522ed30.zip
dm: push use of on-stack flush_bio down to __send_empty_flush()
Eliminates duplicate code, no functional change. Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm.c')
-rw-r--r--drivers/md/dm.c37
1 files changed, 13 insertions, 24 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 0d3639414be7..ea901cb09ea7 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1426,6 +1426,17 @@ static int __send_empty_flush(struct clone_info *ci)
{
unsigned target_nr = 0;
struct dm_target *ti;
+ struct bio flush_bio;
+
+ /*
+ * Use an on-stack bio for this, it's safe since we don't
+ * need to reference it after submit. It's just used as
+ * the basis for the clone(s).
+ */
+ bio_init(&flush_bio, NULL, 0);
+ flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH | REQ_SYNC;
+ ci->bio = &flush_bio;
+ ci->sector_count = 0;
/*
* Empty flush uses a statically initialized bio, as the base for
@@ -1439,6 +1450,8 @@ static int __send_empty_flush(struct clone_info *ci)
BUG_ON(bio_has_data(ci->bio));
while ((ti = dm_table_get_target(ci->map, target_nr++)))
__send_duplicate_bios(ci, ti, ti->num_flush_bios, NULL);
+
+ bio_uninit(ci->bio);
return 0;
}
@@ -1615,19 +1628,7 @@ static blk_qc_t __split_and_process_bio(struct mapped_device *md,
init_clone_info(&ci, md, map, bio);
if (bio->bi_opf & REQ_PREFLUSH) {
- struct bio flush_bio;
-
- /*
- * Use an on-stack bio for this, it's safe since we don't
- * need to reference it after submit. It's just used as
- * the basis for the clone(s).
- */
- bio_init(&flush_bio, NULL, 0);
- flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH | REQ_SYNC;
- ci.bio = &flush_bio;
- ci.sector_count = 0;
error = __send_empty_flush(&ci);
- bio_uninit(ci.bio);
/* dec_pending submits any data associated with flush */
} else if (op_is_zone_mgmt(bio_op(bio))) {
ci.bio = bio;
@@ -1690,19 +1691,7 @@ static blk_qc_t __process_bio(struct mapped_device *md, struct dm_table *map,
init_clone_info(&ci, md, map, bio);
if (bio->bi_opf & REQ_PREFLUSH) {
- struct bio flush_bio;
-
- /*
- * Use an on-stack bio for this, it's safe since we don't
- * need to reference it after submit. It's just used as
- * the basis for the clone(s).
- */
- bio_init(&flush_bio, NULL, 0);
- flush_bio.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH | REQ_SYNC;
- ci.bio = &flush_bio;
- ci.sector_count = 0;
error = __send_empty_flush(&ci);
- bio_uninit(ci.bio);
/* dec_pending submits any data associated with flush */
} else {
struct dm_target_io *tio;