linux-kernel - [PATCH] fs: fix ext4 unused-variable warning

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Message-Id: <20200107200233.3244877-1-arnd@arndb.de>
Date:   Tue,  7 Jan 2020 21:02:12 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     "Theodore Ts'o" <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        "Darrick J. Wong" <darrick.wong@...cle.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Andreas Gruenbacher <agruenba@...hat.com>,
        David Sterba <dsterba@...e.com>,
        Richard Weinberger <richard@....at>, Jan Kara <jack@...e.cz>,
        Ritesh Harjani <riteshh@...ux.ibm.com>,
        Eric Biggers <ebiggers@...gle.com>,
        Matthew Bobrowski <mbobrowski@...browski.org>,
        Chandan Rajendra <chandan@...ux.ibm.com>,
        Eric Whitney <enwlinux@...il.com>, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] fs: fix ext4 unused-variable warning

A bugfix introduce a harmless warning:

fs/ext4/inode.c: In function 'ext4_page_mkwrite':
fs/ext4/inode.c:5910:24: error: unused variable 'mapping' [-Werror=unused-variable]

Remove the now-unused variable.

Fixes: 4a58d8158f6d ("fs: Fix page_mkwrite off-by-one errors")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 fs/ext4/inode.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 9a3e8d075cd0..d0049fd0bfd4 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5907,7 +5907,6 @@ vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf)
 	vm_fault_t ret;
 	struct file *file = vma->vm_file;
 	struct inode *inode = file_inode(file);
-	struct address_space *mapping = inode->i_mapping;
 	handle_t *handle;
 	get_block_t *get_block;
 	int retries = 0;
-- 
2.20.0