linux-kernel - [PATCH] fs/direct-io: remove redundant comparison

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Date:	Fri, 21 Feb 2014 18:13:15 +0800
From:	Gu Zheng <guz.fnst@...fujitsu.com>
To:	Al Viro <viro@...iv.linux.org.uk>
CC:	fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] fs/direct-io: remove redundant comparison

The return value of bio_get_nr_vecs() can not bigger than BIO_MAX_PAGES,
so we can remove redundant the comparison between nr_pages and
BIO_MAX_PAGES.

Signed-off-by: Gu Zheng <guz.fnst@...fujitsu.com>
---
 fs/direct-io.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/fs/direct-io.c b/fs/direct-io.c
index 160a548..6e6bff3 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -664,7 +664,6 @@ static inline int dio_new_bio(struct dio *dio, struct dio_submit *sdio,
 		goto out;
 	sector = start_sector << (sdio->blkbits - 9);
 	nr_pages = min(sdio->pages_in_io, bio_get_nr_vecs(map_bh->b_bdev));
-	nr_pages = min(nr_pages, BIO_MAX_PAGES);
 	BUG_ON(nr_pages <= 0);
 	dio_bio_alloc(dio, sdio, map_bh->b_bdev, sector, nr_pages);
 	sdio->boundary = 0;
-- 
1.7.7

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