From: Jens Axboe <jens.axboe@oracle.com>
Date: Tue, 7 Apr 2009 06:59:11 +0000 (+0200)
Subject: block: remove unused REQ_UNPLUG
X-Git-Tag: firefly_0821_release~14581^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2385327725419a76cfbca7258abd95908b8ba9eb;p=firefly-linux-kernel-4.4.55.git

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 3688abff2430..43fdedc524ee 100644
--- 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 e03660964e02..ba54c834a590 100644
--- 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