linux-kernel - [PATCH] ext4: Remove repeated test in ext4_file_read

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Message-Id: <1514362798-5850-1-git-send-email-fxinrong@gmail.com>
Date:   Wed, 27 Dec 2017 16:19:58 +0800
From:   Sean Fu <fxinrong@...il.com>
To:     tytso@....edu
Cc:     adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org, Sean Fu <fxinrong@...il.com>
Subject: [PATCH] ext4: Remove repeated test in ext4_file_read_iter.

generic_file_read_iter has done the count test.
So ext4_file_read_iter don't need to test the count repeatedly.

Signed-off-by: Sean Fu <fxinrong@...il.com>
---
 fs/ext4/file.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index a0ae27b..87ca13e 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -67,9 +67,6 @@ static ssize_t ext4_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
 	if (unlikely(ext4_forced_shutdown(EXT4_SB(file_inode(iocb->ki_filp)->i_sb))))
 		return -EIO;
 
-	if (!iov_iter_count(to))
-		return 0; /* skip atime */
-
 #ifdef CONFIG_FS_DAX
 	if (IS_DAX(file_inode(iocb->ki_filp)))
 		return ext4_dax_read_iter(iocb, to);
-- 
2.6.2