Messages in this thread Patch in this message | | | Date | Mon, 11 Jul 2011 10:31:46 -0700 | Subject | [PATCH]: block: try-2 (modified): Initialize bi_rw in mpage so bio_add can make use of it. | From | Muthu Kumar <> |
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Jens et al,
do_mpage_readpage()/__mpage_writepage(): When they allocate a new bio, bi_rw is not initialized. So later when they call __bio_add_page(), struct bvec_merge_data bvm's .bi_rw will not be initialized with right direction. It will be useful for some merge functions if they know the direction of transfer.
Let me know if this looks good. There are few more places like this (e.g blkdev_issue_zeroout()). Would it make sense to send patch for these cases also?
Signed-off-by: Muthukumar R <muthur@gmail.com>
------------------------ fs/mpage.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) ------------------------ diff --git a/fs/mpage.c b/fs/mpage.c index fdfae9f..efabfc0 100644 --- a/fs/mpage.c +++ b/fs/mpage.c @@ -291,6 +291,7 @@ alloc_new: GFP_KERNEL); if (bio == NULL) goto confused; + bio->bi_rw = READ; }
length = first_hole << blkbits; @@ -583,6 +584,7 @@ alloc_new: bio_get_nr_vecs(bdev), GFP_NOFS|__GFP_HIGH); if (bio == NULL) goto confused; + bio->bi_rw = WRITE; }
/*
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