[11/13] bcache: use kmalloc to allocate bio in bch_data_verify()

Commit Message

NeilBrown May 2, 2017, 3:42 a.m. UTC

This function allocates a bio, then a collection
of pages.  It copes with failure.

It currently uses a mempool() to allocate the bio,
but alloc_page() to allocate the pages.  These fail
in different ways, so the usage is inconsistent.

Change the bio_clone() to bio_clone_kmalloc()
so that no pool is used either for the bio or the pages.

Reviewed-by: Christoph Hellwig <[e-mail]>
Acked-by: Kent Overstreet <[e-mail]>
Reviewed-by : Ming Lei <[e-mail]>
Signed-off-by: NeilBrown <[e-mail]>
---
 drivers/md/bcache/debug.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c
index 06f55056aaae..35a5a7210e51 100644
--- a/drivers/md/bcache/debug.c
+++ b/drivers/md/bcache/debug.c
@@ -110,7 +110,7 @@  void bch_data_verify(struct cached_dev *dc, struct bio *bio)
 	struct bio_vec bv, cbv;
 	struct bvec_iter iter, citer = { 0 };
 
-	check = bio_clone(bio, GFP_NOIO);
+	check = bio_clone_kmalloc(bio, GFP_NOIO);
 	if (!check)
 		return;
 	check->bi_opf = REQ_OP_READ;