linux-kernel - [PATCH -next] fs/ntfs: fix set but not used variable 'log_page

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Message-ID: <20200312041353.19877-1-zhengzengkai@huawei.com>
Date:   Thu, 12 Mar 2020 12:13:53 +0800
From:   Zheng Zengkai <zhengzengkai@...wei.com>
To:     <anton@...era.com>
CC:     <linux-ntfs-dev@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>, <zhengzengkai@...wei.com>
Subject: [PATCH -next] fs/ntfs: fix set but not used variable 'log_page_mask'

Fixes gcc '-Wunused-but-set-variable' warning:

fs/ntfs/logfile.c: In function ntfs_check_logfile:
fs/ntfs/logfile.c:481:21:
 warning: variable log_page_mask set but not used [-Wunused-but-set-variable]

Actually log_page_mask can be used to replace 'log_page_size - 1' as it is set.

Signed-off-by: Zheng Zengkai <zhengzengkai@...wei.com>
---
 fs/ntfs/logfile.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ntfs/logfile.c b/fs/ntfs/logfile.c
index a0c40f1be7ac..c35fcf389369 100644
--- a/fs/ntfs/logfile.c
+++ b/fs/ntfs/logfile.c
@@ -507,7 +507,7 @@ bool ntfs_check_logfile(struct inode *log_vi, RESTART_PAGE_HEADER **rp)
 	 * optimize log_page_size and log_page_bits into constants.
 	 */
 	log_page_bits = ntfs_ffs(log_page_size) - 1;
-	size &= ~(s64)(log_page_size - 1);
+	size &= ~(s64)(log_page_mask);
 	/*
 	 * Ensure the log file is big enough to store at least the two restart
 	 * pages and the minimum number of log record pages.
-- 
2.20.1