[PATCH] fs/ntfs: remove unused varible attr_len

[PATCH] fs/ntfs: remove unused varible attr_len

[Alex Shi]

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@linux.alibaba.com>
Cc: Anton Altaparmakov <anton@tuxera.com> 
Cc: linux-ntfs-dev@lists.sourceforge.net 
Cc: linux-kernel@vger.kernel.org 
---
 fs/ntfs/inode.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index caf563981532..d3127ea201ec 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 +2720,7 @@ 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);
+	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

Re: [PATCH] fs/ntfs: remove unused varible attr_len

[Alex Shi]

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@linux.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@linux.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

Re: [PATCH] fs/ntfs: remove unused varible attr_len

[Anton Altaparmakov]

Hi Andrew,

Can you also please merge this one?  Thanks a lot in advance!

Alex, again, thank you for the patch!

Best regards,

	Anton

> On 8 Nov 2020, at 08:06, Alex Shi <alex.shi@linux.alibaba.com> wrote:
> From: Alex Shi <alex.shi@linux.alibaba.com>
> Date: Sun, 8 Nov 2020 15:52:32 +0800
> Subject: [PATCH] fs/ntfs: remove unused varible attr_len
> 
> 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@linux.alibaba.com>
> Acked-by: Anton Altaparmakov <anton@tuxera.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
> 


-- 
Anton Altaparmakov <anton at tuxera.com> (replace at with @)
Lead in File System Development, Tuxera Inc., http://www.tuxera.com/
Linux NTFS maintainer