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btrfs: don't access the bio directly in the raid5/6 code 

Just use bio_for_each_segment_all to iterate over all segments.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig 2016-11-25 09:07:47 +01:00 committed by David Sterba
parent 974b1adc3b
commit 80ace3e403
1 changed files with 6 additions and 10 deletions
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16
fs/btrfs/raid56.c
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@ -1144,10 +1144,10 @@ static void validate_rbio_for_rmw(struct btrfs_raid_bio *rbio)
static void index_rbio_pages(struct btrfs_raid_bio *rbio)
{
struct bio *bio;
struct bio_vec *bvec;
u64 start;
unsigned long stripe_offset;
unsigned long page_index;
struct page *p;
int i;
spin_lock_irq(&rbio->bio_list_lock);
@ -1156,10 +1156,8 @@ static void index_rbio_pages(struct btrfs_raid_bio *rbio)
stripe_offset = start - rbio->bbio->raid_map[0];
page_index = stripe_offset >> PAGE_SHIFT;
for (i = 0; i < bio->bi_vcnt; i++) {
p = bio->bi_io_vec[i].bv_page;
rbio->bio_pages[page_index + i] = p;
}
bio_for_each_segment_all(bvec, bio, i)
rbio->bio_pages[page_index + i] = bvec->bv_page;
}
spin_unlock_irq(&rbio->bio_list_lock);
}
@ -1433,13 +1431,11 @@ static int fail_bio_stripe(struct btrfs_raid_bio *rbio,
*/
static void set_bio_pages_uptodate(struct bio *bio)
{
struct bio_vec *bvec;
int i;
struct page *p;
for (i = 0; i < bio->bi_vcnt; i++) {
p = bio->bi_io_vec[i].bv_page;
SetPageUptodate(p);
}
bio_for_each_segment_all(bvec, bio, i)
SetPageUptodate(bvec->bv_page);
}
/*