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block: Remove forced page bouncing under IO

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JBD layer wrote back data buffers without setting PageWriteback bit.
Thus standard mechanism for guaranteeing stable pages under IO did not
work. Since JBD is gone now and there is no other user of the
functionality, just remove it.

Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2015-06-18 17:19:14 +02:00 • committed by Jan Kara
parent c290ea01ab
commit a3ad0a9da8
2 changed files with 6 additions and 30 deletions
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5
include/linux/blk_types.h
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@ -118,9 +118,8 @@ struct bio {
#define BIO_USER_MAPPED 4 /* contains user pages */
#define BIO_NULL_MAPPED 5 /* contains invalid user pages */
#define BIO_QUIET 6 /* Make BIO Quiet */
#define BIO_SNAP_STABLE 7 /* bio data must be snapshotted during write */
#define BIO_CHAIN 8 /* chained bio, ->bi_remaining in effect */
#define BIO_REFFED 9 /* bio has elevated ->bi_cnt */
#define BIO_CHAIN 7 /* chained bio, ->bi_remaining in effect */
#define BIO_REFFED 8 /* bio has elevated ->bi_cnt */
/*
* Flags starting here get preserved by bio_reset() - this includes