From 491221f88d00651e449c9caf7415b6453c8a77b7 Mon Sep 17 00:00:00 2001
From: Guoqing Jiang <gqjiang@suse.com>
Date: Thu, 22 Sep 2016 03:10:01 -0400
Subject: [PATCH] block: export bio_free_pages to other modules
bio_free_pages is introduced in commit 1dfa0f68c040
("block: add a helper to free bio bounce buffer pages"),
we can reuse the func in other modules after it was
imported.
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Jens Axboe <axboe@fb.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: Shaohua Li <shli@fb.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Acked-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---
block/bio.c | 3 ++-
drivers/md/bcache/btree.c | 6 +-----
drivers/md/bcache/debug.c | 6 ++----
drivers/md/bcache/movinggc.c | 5 +----
drivers/md/bcache/request.c | 9 ++-------
drivers/md/bcache/writeback.c | 5 +----
drivers/md/dm-log-writes.c | 6 +-----
drivers/md/raid1.c | 8 ++------
include/linux/bio.h | 1 +
9 files changed, 13 insertions(+), 36 deletions(-)
diff --git a/block/bio.c b/block/bio.c
index a6d279e1ea9e9..db85c5753a765 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1068,7 +1068,7 @@ static int bio_copy_to_iter(struct bio *bio, struct iov_iter iter)
return 0;
}
-static void bio_free_pages(struct bio *bio)
+void bio_free_pages(struct bio *bio)
{
struct bio_vec *bvec;
int i;
@@ -1076,6 +1076,7 @@ static void bio_free_pages(struct bio *bio)
bio_for_each_segment_all(bvec, bio, i)
__free_page(bvec->bv_page);
}
+EXPORT_SYMBOL(bio_free_pages);
/**
* bio_uncopy_user - finish previously mapped bio
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 76f7534d1dd15..81d3db40cd7be 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -361,12 +361,8 @@ static void __btree_node_write_done(struct closure *cl)
static void btree_node_write_done(struct closure *cl)
{
struct btree *b = container_of(cl, struct btree, io);
- struct bio_vec *bv;
- int n;
-
- bio_for_each_segment_all(bv, b->bio, n)
- __free_page(bv->bv_page);
+ bio_free_pages(b->bio);
__btree_node_write_done(cl);
}
diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c
index c28df164701e7..333a1e5f6ae66 100644
--- a/drivers/md/bcache/debug.c
+++ b/drivers/md/bcache/debug.c
@@ -107,9 +107,8 @@ void bch_data_verify(struct cached_dev *dc, struct bio *bio)
{
char name[BDEVNAME_SIZE];
struct bio *check;
- struct bio_vec bv, *bv2;
+ struct bio_vec bv;
struct bvec_iter iter;
- int i;
check = bio_clone(bio, GFP_NOIO);
if (!check)
@@ -136,8 +135,7 @@ void bch_data_verify(struct cached_dev *dc, struct bio *bio)
kunmap_atomic(p1);
}
- bio_for_each_segment_all(bv2, check, i)
- __free_page(bv2->bv_page);
+ bio_free_pages(check);
out_put:
bio_put(check);
}
diff --git a/drivers/md/bcache/movinggc.c b/drivers/md/bcache/movinggc.c
index 1881319f2298f..5c4bddecfaf09 100644
--- a/drivers/md/bcache/movinggc.c
+++ b/drivers/md/bcache/movinggc.c
@@ -44,11 +44,8 @@ static void write_moving_finish(struct closure *cl)
{
struct moving_io *io = container_of(cl, struct moving_io, cl);
struct bio *bio = &io->bio.bio;
- struct bio_vec *bv;
- int i;
- bio_for_each_segment_all(bv, bio, i)
- __free_page(bv->bv_page);
+ bio_free_pages(bio);
if (io->op.replace_collision)
trace_bcache_gc_copy_collision(&io->w->key);
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index 4b177fe11ebb9..40ffe5e424b30 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -694,13 +694,8 @@ static void cached_dev_cache_miss_done(struct closure *cl)
if (s->iop.replace_collision)
bch_mark_cache_miss_collision(s->iop.c, s->d);
- if (s->iop.bio) {
- int i;
- struct bio_vec *bv;
-
- bio_for_each_segment_all(bv, s->iop.bio, i)
- __free_page(bv->bv_page);
- }
+ if (s->iop.bio)
+ bio_free_pages(s->iop.bio);
cached_dev_bio_complete(cl);
}
diff --git a/drivers/md/bcache/writeback.c b/drivers/md/bcache/writeback.c
index d9fd2a62e5f6f..e51644e503a53 100644
--- a/drivers/md/bcache/writeback.c
+++ b/drivers/md/bcache/writeback.c
@@ -128,11 +128,8 @@ static void write_dirty_finish(struct closure *cl)
struct dirty_io *io = container_of(cl, struct dirty_io, cl);
struct keybuf_key *w = io->bio.bi_private;
struct cached_dev *dc = io->dc;
- struct bio_vec *bv;
- int i;
- bio_for_each_segment_all(bv, &io->bio, i)
- __free_page(bv->bv_page);
+ bio_free_pages(&io->bio);
/* This is kind of a dumb way of signalling errors. */
if (KEY_DIRTY(&w->key)) {
diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c
index 4ab68033f9d10..b52404159ccf9 100644
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -149,8 +149,6 @@ static void put_io_block(struct log_writes_c *lc)
static void log_end_io(struct bio *bio)
{
struct log_writes_c *lc = bio->bi_private;
- struct bio_vec *bvec;
- int i;
if (bio->bi_error) {
unsigned long flags;
@@ -161,9 +159,7 @@ static void log_end_io(struct bio *bio)
spin_unlock_irqrestore(&lc->blocks_lock, flags);
}
- bio_for_each_segment_all(bvec, bio, i)
- __free_page(bvec->bv_page);
-
+ bio_free_pages(bio);
put_io_block(lc);
bio_put(bio);
}
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 21dc00eb1989f..1961d827dbd19 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -145,12 +145,8 @@ static void * r1buf_pool_alloc(gfp_t gfp_flags, void *data)
return r1_bio;
out_free_pages:
- while (--j >= 0) {
- struct bio_vec *bv;
-
- bio_for_each_segment_all(bv, r1_bio->bios[j], i)
- __free_page(bv->bv_page);
- }
+ while (--j >= 0)
+ bio_free_pages(r1_bio->bios[j]);
out_free_bio:
while (++j < pi->raid_disks)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index e00721a2dce13..97cb48f03dc73 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -459,6 +459,7 @@ static inline void bio_flush_dcache_pages(struct bio *bi)
extern void bio_copy_data(struct bio *dst, struct bio *src);
extern int bio_alloc_pages(struct bio *bio, gfp_t gfp);
+extern void bio_free_pages(struct bio *bio);
extern struct bio *bio_copy_user_iov(struct request_queue *,
struct rq_map_data *,
--
2.30.2