Signed-off-by: Kent Overstreet <koverstr...@google.com>
---
drivers/block/osdblk.c | 3 +--
fs/bio.c | 13 +++++++++++++
fs/exofs/ore.c | 5 ++---
include/linux/bio.h | 1 +
4 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/drivers/block/osdblk.c b/drivers/block/osdblk.c
index 87311eb..1bbc681 100644
--- a/drivers/block/osdblk.c
+++ b/drivers/block/osdblk.c
@@ -266,11 +266,10 @@ static struct bio *bio_chain_clone(struct bio *old_chain,
gfp_t gfpmask)
struct bio *tmp, *new_chain = NULL, *tail = NULL;
while (old_chain) {
- tmp = bio_kmalloc(gfpmask, old_chain->bi_max_vecs);
+ tmp = bio_clone_kmalloc(old_chain, gfpmask);
if (!tmp)
goto err_out;
- __bio_clone(tmp, old_chain);
tmp->bi_bdev = NULL;
gfpmask &= ~__GFP_WAIT;
tmp->bi_next = NULL;
diff --git a/fs/bio.c b/fs/bio.c
index fa6dee4..9d0ceb2 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -499,6 +499,19 @@ struct bio *bio_clone(struct bio *bio, gfp_t gfp_mask)
}
EXPORT_SYMBOL(bio_clone);
+struct bio *bio_clone_kmalloc(struct bio *bio, gfp_t gfp_mask)
+{
+ struct bio *b = bio_kmalloc(gfp_mask, bio->bi_max_vecs);
+
+ if (!b)
+ return NULL;
+
+ __bio_clone(b, bio);
+
+ return b;
+}
+EXPORT_SYMBOL(bio_clone_kmalloc);
+
/**
* bio_get_nr_vecs - return approx number of vecs
* @bdev: I/O target
diff --git a/fs/exofs/ore.c b/fs/exofs/ore.c
index 24a49d4..a8d92fc 100644
--- a/fs/exofs/ore.c
+++ b/fs/exofs/ore.c
@@ -814,8 +814,8 @@ static int _write_mirror(struct ore_io_state *ios, int
cur_comp)
struct bio *bio;
if (per_dev != master_dev) {
- bio = bio_kmalloc(GFP_KERNEL,
- master_dev->bio->bi_max_vecs);
+ bio = bio_clone_kmalloc(master_dev->bio,
+ GFP_KERNEL);
if (unlikely(!bio)) {
ORE_DBGMSG(
"Failed to allocate BIO
size=%u\n",
@@ -824,7 +824,6 @@ static int _write_mirror(struct ore_io_state *ios, int
cur_comp)
goto out;
}
- __bio_clone(bio, master_dev->bio);
bio->bi_bdev = NULL;
bio->bi_next = NULL;
per_dev->offset = master_dev->offset;
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 9720544..e180f1d 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -221,6 +221,7 @@ extern int bio_phys_segments(struct request_queue *, struct
bio *);
extern void __bio_clone(struct bio *, struct bio *);
extern struct bio *bio_clone(struct bio *, gfp_t);
+struct bio *bio_clone_kmalloc(struct bio *, gfp_t);
extern void bio_init(struct bio *);
extern void bio_reset(struct bio *);
--
1.7.7.3
--
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