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f2fs: rewrite f2fs_bio_alloc to make it simpler 

Since, GFP_NOFS(__GFP_WAIT) is used for allocation requests of bio in f2fs.
So, there is no chance of returning NULL from the BIO allocation.

Making the bio allocation routine for f2fs simpler.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
This commit is contained in:
Namjae Jeon 2012-12-08 14:53:40 +09:00 committed by Jaegeuk Kim
parent d08ab08d14
commit c212991a6b
1 changed files with 7 additions and 17 deletions
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24
fs/f2fs/segment.c
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@ -647,28 +647,18 @@ struct bio *f2fs_bio_alloc(struct block_device *bdev, sector_t first_sector,
int nr_vecs, gfp_t gfp_flags)
{
struct bio *bio;
repeat:
/* allocate new bio */
bio = bio_alloc(gfp_flags, nr_vecs);
if (bio == NULL && (current->flags & PF_MEMALLOC)) {
while (!bio && (nr_vecs /= 2))
bio = bio_alloc(gfp_flags, nr_vecs);
}
if (bio) {
bio->bi_bdev = bdev;
bio->bi_sector = first_sector;
bio->bi_bdev = bdev;
bio->bi_sector = first_sector;
retry:
bio->bi_private = kmalloc(sizeof(struct bio_private),
GFP_NOFS | __GFP_HIGH);
if (!bio->bi_private) {
cond_resched();
goto retry;
}
}
if (bio == NULL) {
bio->bi_private = kmalloc(sizeof(struct bio_private),
GFP_NOFS | __GFP_HIGH);
if (!bio->bi_private) {
cond_resched();
goto repeat;
goto retry;
}
return bio;
}