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authorKent Overstreet <koverstreet@google.com>2012-09-06 02:22:02 +0400
committerKent Overstreet <koverstreet@google.com>2013-03-24 01:26:30 +0400
commitcb34e057ad22a1c2c6f2cb6cd1cbd05cc2f28f28 (patch)
tree4077b8e6e88bc7c5eb4cd738b4203401daba28a9 /fs
parentd74c6d514fe314b8bdab58b487b25992291577ec (diff)
downloadlinux-cb34e057ad22a1c2c6f2cb6cd1cbd05cc2f28f28.tar.xz
block: Convert some code to bio_for_each_segment_all()
More prep work for immutable bvecs: A few places in the code were either open coding or using the wrong version - fix. After we introduce the bvec iter, it'll no longer be possible to modify the biovec through bio_for_each_segment_all() - it doesn't increment a pointer to the current bvec, you pass in a struct bio_vec (not a pointer) which is updated with what the current biovec would be (taking into account bi_bvec_done and bi_size). So because of that it's more worthwhile to be consistent about bio_for_each_segment()/bio_for_each_segment_all() usage. Signed-off-by: Kent Overstreet <koverstreet@google.com> CC: Jens Axboe <axboe@kernel.dk> CC: NeilBrown <neilb@suse.de> CC: Alasdair Kergon <agk@redhat.com> CC: dm-devel@redhat.com CC: Alexander Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
-rw-r--r--fs/bio.c20
-rw-r--r--fs/direct-io.c8
2 files changed, 14 insertions, 14 deletions
diff --git a/fs/bio.c b/fs/bio.c
index 618f9044c414..fe3aee90c988 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -1548,11 +1548,11 @@ EXPORT_SYMBOL(bio_copy_kern);
*/
void bio_set_pages_dirty(struct bio *bio)
{
- struct bio_vec *bvec = bio->bi_io_vec;
+ struct bio_vec *bvec;
int i;
- for (i = 0; i < bio->bi_vcnt; i++) {
- struct page *page = bvec[i].bv_page;
+ bio_for_each_segment_all(bvec, bio, i) {
+ struct page *page = bvec->bv_page;
if (page && !PageCompound(page))
set_page_dirty_lock(page);
@@ -1561,11 +1561,11 @@ void bio_set_pages_dirty(struct bio *bio)
static void bio_release_pages(struct bio *bio)
{
- struct bio_vec *bvec = bio->bi_io_vec;
+ struct bio_vec *bvec;
int i;
- for (i = 0; i < bio->bi_vcnt; i++) {
- struct page *page = bvec[i].bv_page;
+ bio_for_each_segment_all(bvec, bio, i) {
+ struct page *page = bvec->bv_page;
if (page)
put_page(page);
@@ -1614,16 +1614,16 @@ static void bio_dirty_fn(struct work_struct *work)
void bio_check_pages_dirty(struct bio *bio)
{
- struct bio_vec *bvec = bio->bi_io_vec;
+ struct bio_vec *bvec;
int nr_clean_pages = 0;
int i;
- for (i = 0; i < bio->bi_vcnt; i++) {
- struct page *page = bvec[i].bv_page;
+ bio_for_each_segment_all(bvec, bio, i) {
+ struct page *page = bvec->bv_page;
if (PageDirty(page) || PageCompound(page)) {
page_cache_release(page);
- bvec[i].bv_page = NULL;
+ bvec->bv_page = NULL;
} else {
nr_clean_pages++;
}
diff --git a/fs/direct-io.c b/fs/direct-io.c
index f853263cf74f..38484b08a39a 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -441,8 +441,8 @@ static struct bio *dio_await_one(struct dio *dio)
static int dio_bio_complete(struct dio *dio, struct bio *bio)
{
const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
- struct bio_vec *bvec = bio->bi_io_vec;
- int page_no;
+ struct bio_vec *bvec;
+ unsigned i;
if (!uptodate)
dio->io_error = -EIO;
@@ -450,8 +450,8 @@ static int dio_bio_complete(struct dio *dio, struct bio *bio)
if (dio->is_async && dio->rw == READ) {
bio_check_pages_dirty(bio); /* transfers ownership */
} else {
- for (page_no = 0; page_no < bio->bi_vcnt; page_no++) {
- struct page *page = bvec[page_no].bv_page;
+ bio_for_each_segment_all(bvec, bio, i) {
+ struct page *page = bvec->bv_page;
if (dio->rw == READ && !PageCompound(page))
set_page_dirty_lock(page);