nilfs2: use GFP_NOIO for bio_alloc instead of GFP_NOWAIT

Alberto Bertogli advised me about bio_alloc() use in nilfs:
On Sat, 13 Jun 2009 22:52:40 -0300, Alberto Bertogli wrote:
> By the way, those bio_alloc()s are using GFP_NOWAIT but it looks
> like they could use at least GFP_NOIO or GFP_NOFS, since the caller
> can (and sometimes do) sleep. The only caller is nilfs_submit_bh(),
> which calls nilfs_submit_seg_bio() which can sleep calling
> wait_for_completion().

This takes in the comment and replaces the use of GFP_NOWAIT flag with
GFP_NOIO.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c
index 9e3fe17..e6d9e37 100644 (file)
--- a/fs/nilfs2/segbuf.c
+++ b/fs/nilfs2/segbuf.c
@@ -316,10 +316,10 @@ static struct bio *nilfs_alloc_seg_bio(struct super_block *sb, sector_t start,
 {
        struct bio *bio;
 
-       bio = bio_alloc(GFP_NOWAIT, nr_vecs);
+       bio = bio_alloc(GFP_NOIO, nr_vecs);
        if (bio == NULL) {
                while (!bio && (nr_vecs >>= 1))
-                       bio = bio_alloc(GFP_NOWAIT, nr_vecs);
+                       bio = bio_alloc(GFP_NOIO, nr_vecs);
        }
        if (likely(bio)) {
                bio->bi_bdev = sb->s_bdev;