linux-kernel - Re: [PATCH] fs/ntfs: remove unused varible attr

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Date:   Sun, 8 Nov 2020 16:06:54 +0800
From:   Alex Shi <alex.shi@...ux.alibaba.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Anton Altaparmakov <anton@...era.com>,
        linux-ntfs-dev@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fs/ntfs: remove unused varible attr_len



在 2020/11/8 下午3:54, Alex Shi 写道:
>  	 */
> -	attr_len = le32_to_cpu(a->length);
> +	le32_to_cpu(a->length);

This line is also useless. and should be removed. so:

>From d1c6de723995adeeecb90c6fd77811dd85b697e6 Mon Sep 17 00:00:00 2001
From: Alex Shi <alex.shi@...ux.alibaba.com>
Date: Sun, 8 Nov 2020 15:52:32 +0800
Subject: [PATCH] fs/ntfs: remove unused varible attr_len
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This varible isn't used anymore, remove it to skip W=1 warning:
fs/ntfs/inode.c:2350:6: warning: variable ‘attr_len’ set but not used
[-Wunused-but-set-variable]

Signed-off-by: Alex Shi <alex.shi@...ux.alibaba.com>
---
 fs/ntfs/inode.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index caf563981532..f7e4cbc26eaf 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -2347,7 +2347,6 @@ int ntfs_truncate(struct inode *vi)
 	ATTR_RECORD *a;
 	const char *te = "  Leaving file length out of sync with i_size.";
 	int err, mp_size, size_change, alloc_change;
-	u32 attr_len;
 
 	ntfs_debug("Entering for inode 0x%lx.", vi->i_ino);
 	BUG_ON(NInoAttr(ni));
@@ -2721,7 +2720,6 @@ int ntfs_truncate(struct inode *vi)
 	 * this cannot fail since we are making the attribute smaller thus by
 	 * definition there is enough space to do so.
 	 */
-	attr_len = le32_to_cpu(a->length);
 	err = ntfs_attr_record_resize(m, a, mp_size +
 			le16_to_cpu(a->data.non_resident.mapping_pairs_offset));
 	BUG_ON(err);
-- 
1.8.3.1