block: Add bio_for_each_segment_all()

__bio_for_each_segment() iterates bvecs from the specified index
instead of bio->bv_idx.  Currently, the only usage is to walk all the
bvecs after the bio has been advanced by specifying 0 index.

For immutable bvecs, we need to split these apart;
bio_for_each_segment() is going to have a different implementation.
This will also help document the intent of code that's using it -
bio_for_each_segment_all() is only legal to use for code that owns the
bio.

Signed-off-by: Kent Overstreet <koverstreet@google.com>
CC: Jens Axboe <axboe@kernel.dk>
CC: Neil Brown <neilb@suse.de>
CC: Boaz Harrosh <bharrosh@panasas.com>

2 files changed, 2 insertions, 2 deletions

diff --git a/fs/exofs/ore.c b/fs/exofs/ore.c
index f936cb50dc0d..b74422888604 100644
--- a/fs/exofs/ore.c
+++ b/fs/exofs/ore.c
@@ -401,7 +401,7 @@ static void _clear_bio(struct bio *bio)
         struct bio_vec *bv;
         unsigned i;
 
-        __bio_for_each_segment(bv, bio, i, 0) {
+        bio_for_each_segment_all(bv, bio, i) {
                 unsigned this_count = bv->bv_len;
 
                 if (likely(PAGE_SIZE == this_count))
diff --git a/fs/exofs/ore_raid.c b/fs/exofs/ore_raid.c
index b963f38ac298..7682b970d0f1 100644
--- a/fs/exofs/ore_raid.c
+++ b/fs/exofs/ore_raid.c
@@ -432,7 +432,7 @@ static void _mark_read4write_pages_uptodate(struct ore_io_state *ios, int ret)
                 if (!bio)
                         continue;
 
-                __bio_for_each_segment(bv, bio, i, 0) {
+                bio_for_each_segment_all(bv, bio, i) {
                         struct page *page = bv->bv_page;
 
                         SetPageUptodate(page);