[PATCH V15 15/18] block: always define BIO_MAX_PAGES as 256

From: Ming Lei
Date: Fri Feb 15 2019 - 06:17:38 EST

Now multi-page bvec can cover CONFIG_THP_SWAP, so we don't need to
increase BIO_MAX_PAGES for it.

CONFIG_THP_SWAP needs to split one THP into normal pages and adds
them all to one bio. With multipage-bvec, it just takes one bvec to
hold them all.

Reviewed-by: Omar Sandoval <osandov@xxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
include/linux/bio.h | 8 --------
1 file changed, 8 deletions(-)

diff --git a/include/linux/bio.h b/include/linux/bio.h
index 9f77adcfde82..bdd11d4c2f05 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -34,15 +34,7 @@
#define BIO_BUG_ON

-#if HPAGE_PMD_NR > 256
#define BIO_MAX_PAGES 256
-#define BIO_MAX_PAGES 256

#define bio_prio(bio) (bio)->bi_ioprio
#define bio_set_prio(bio, prio) ((bio)->bi_ioprio = prio)