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From:   Shaokun Zhang <zhangshaokun@hisilicon.com>
To:     <linux-ext4@vger.kernel.org>, <linux-kernel@vger.kernel.org>
CC:     Yang Guo <guoyang2@huawei.com>, Theodore Ts'o <tytso@mit.edu>,
        "Andreas Dilger" <adilger.kernel@dilger.ca>,
        Shaokun Zhang <zhangshaokun@hisilicon.com>
Subject: [PATCH] ext4: Delete redundant uptodate check for buffer
Date:   Thu, 1 Apr 2021 15:03:30 +0800
Message-ID: <1617260610-29770-1-git-send-email-zhangshaokun@hisilicon.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

From: Yang Guo <guoyang2@huawei.com>

The buffer uptodate state has been checked in function set_buffer_uptodate,
there is no need use buffer_uptodate before calling set_buffer_uptodate and
delete it.

Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Signed-off-by: Yang Guo <guoyang2@huawei.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
---
 fs/ext4/inode.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 0948a43f1b3d..32fa3ad38797 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1066,8 +1066,7 @@ static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
 		block_end = block_start + blocksize;
 		if (block_end <= from || block_start >= to) {
 			if (PageUptodate(page)) {
-				if (!buffer_uptodate(bh))
-					set_buffer_uptodate(bh);
+				set_buffer_uptodate(bh);
 			}
 			continue;
 		}
@@ -1092,8 +1091,7 @@ static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
 			}
 		}
 		if (PageUptodate(page)) {
-			if (!buffer_uptodate(bh))
-				set_buffer_uptodate(bh);
+			set_buffer_uptodate(bh);
 			continue;
 		}
 		if (!buffer_uptodate(bh) && !buffer_delay(bh) &&
-- 
2.7.4