block: remove unused REQ_UNPLUG

The request inherits the unplug flag from the bio, but it isn't actually
used. The bio flag stops at __make_request(), which tells it to unplug
after submission. Passing it on to the request doesn't make any sense.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/block/blk-core.c b/block/blk-core.c
index 3688abf..43fdedc 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1123,8 +1123,6 @@ void init_request_from_bio(struct request *req, struct bio *bio)
 
        if (bio_sync(bio))
                req->cmd_flags |= REQ_RW_SYNC;
-       if (bio_unplug(bio))
-               req->cmd_flags |= REQ_UNPLUG;
        if (bio_rw_meta(bio))
                req->cmd_flags |= REQ_RW_META;
        if (bio_noidle(bio))

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index e036609..ba54c83 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -117,7 +117,6 @@ enum rq_flag_bits {
        __REQ_RW_META,          /* metadata io request */
        __REQ_COPY_USER,        /* contains copies of user pages */
        __REQ_INTEGRITY,        /* integrity metadata has been remapped */
-       __REQ_UNPLUG,           /* unplug queue on submission */
        __REQ_NOIDLE,           /* Don't anticipate more IO after this one */
        __REQ_NR_BITS,          /* stops here */
 };
@@ -145,7 +144,6 @@ enum rq_flag_bits {
 #define REQ_RW_META    (1 << __REQ_RW_META)
 #define REQ_COPY_USER  (1 << __REQ_COPY_USER)
 #define REQ_INTEGRITY  (1 << __REQ_INTEGRITY)
-#define REQ_UNPLUG     (1 << __REQ_UNPLUG)
 #define REQ_NOIDLE     (1 << __REQ_NOIDLE)
 
 #define BLK_MAX_CDB    16