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block: Add bio_for_each_segment_all()

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__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 <[email protected]>
CC: Jens Axboe <[email protected]>
CC: Neil Brown <[email protected]>
CC: Boaz Harrosh <[email protected]>
This commit is contained in:
Kent Overstreet 2013-02-06 12:23:11 -08:00
commit d74c6d514f
7 changed files with 25 additions and 14 deletions
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2
fs/exofs/ore.c
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@ -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))

2
fs/exofs/ore_raid.c
View file

@ -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);