[PATCH] ext4:quiet 'unsed variables' compiling warnings.

[PATCH] ext4:quiet 'unsed variables' compiling warnings.

[Yongqiang Yang]

Delete unused variables.

Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
---
 fs/ext4/extents.c |    2 --
 fs/ext4/mballoc.c |    5 +----
 2 files changed, 1 insertions(+), 6 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 5199bac..a33bf11 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3107,12 +3107,10 @@ static int ext4_convert_unwritten_extents_endio(handle_t *handle,
 					      struct ext4_ext_path *path)
 {
 	struct ext4_extent *ex;
-	struct ext4_extent_header *eh;
 	int depth;
 	int err = 0;
 
 	depth = ext_depth(inode);
-	eh = path[depth].p_hdr;
 	ex = path[depth].p_ext;
 
 	ext_debug("ext4_convert_unwritten_extents_endio: inode %lu, logical"
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 859f2ae..fece8c2 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2860,7 +2860,7 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac,
 {
 	int bsbits, max;
 	ext4_lblk_t end;
-	loff_t size, orig_size, start_off;
+	loff_t size, start_off;
 	ext4_lblk_t start;
 	struct ext4_inode_info *ei = EXT4_I(ac->ac_inode);
 	struct ext4_prealloc_space *pa;
@@ -2892,7 +2892,6 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac,
 	size = size << bsbits;
 	if (size < i_size_read(ac->ac_inode))
 		size = i_size_read(ac->ac_inode);
-	orig_size = size;
 
 	/* max size of free chunks */
 	max = 2 << bsbits;
@@ -4666,12 +4665,10 @@ void ext4_add_groupblocks(handle_t *handle, struct super_block *sb,
 	struct ext4_buddy e4b;
 	int err = 0, ret, blk_free_count;
 	ext4_grpblk_t blocks_freed;
-	struct ext4_group_info *grp;
 
 	ext4_debug("Adding block(s) %llu-%llu\n", block, block + count - 1);
 
 	ext4_get_group_no_and_offset(sb, block, &block_group, &bit);
-	grp = ext4_get_group_info(sb, block_group);
 	/*
 	 * Check to see if we are freeing blocks across a group
 	 * boundary.
-- 
1.7.5.1

Re: [PATCH] ext4:quiet 'unsed variables' compiling warnings.

[Ted Ts'o]

On Wed, Jun 15, 2011 at 11:27:00AM +0800, Yongqiang Yang wrote:
> Delete unused variables.
> 
> Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
> diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
> index 859f2ae..fece8c2 100644
> --- a/fs/ext4/mballoc.c
> +++ b/fs/ext4/mballoc.c
> @@ -2860,7 +2860,7 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac,
>  {
>  	int bsbits, max;
>  	ext4_lblk_t end;
> -	loff_t size, orig_size, start_off;
> +	loff_t size, start_off;

Unfortunately, orig_size is being used by an mb_debug statement.  So
simply removing orig_size and its initialization will cause the build
to break if CONFIG_EXT4_DEBUG is enabled.

Can you resend this patch with this part of the patch removed?

Also, for future reference I prefer for consistency's sake that the
one-line summary be:

ext4: quiet 'used variables' compiling warnings

(note the space after "ext4: ", the lack of a ending period, and the
spelling correction for "unsed"; the other change which I will
commonly make for folks, again for consistency, is to make the first
word after "ext4: " lower case --- the summary does not have to be a
complete sentence, which is why I remove the trailing period)

Thanks,

						- Ted

Re: [PATCH] ext4:quiet 'unsed variables' compiling warnings.

[Yongqiang Yang]

On Tue, Jun 28, 2011 at 4:34 AM, Ted Ts'o <tytso@mit.edu> wrote:
> On Wed, Jun 15, 2011 at 11:27:00AM +0800, Yongqiang Yang wrote:
>> Delete unused variables.
>>
>> Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
>> diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
>> index 859f2ae..fece8c2 100644
>> --- a/fs/ext4/mballoc.c
>> +++ b/fs/ext4/mballoc.c
>> @@ -2860,7 +2860,7 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac,
>>  {
>>       int bsbits, max;
>>       ext4_lblk_t end;
>> -     loff_t size, orig_size, start_off;
>> +     loff_t size, start_off;
>
> Unfortunately, orig_size is being used by an mb_debug statement.  So
> simply removing orig_size and its initialization will cause the build
> to break if CONFIG_EXT4_DEBUG is enabled.
Sorry for my carelessness.
>
> Can you resend this patch with this part of the patch removed?
>
> Also, for future reference I prefer for consistency's sake that the
> one-line summary be:
>
> ext4: quiet 'used variables' compiling warnings
>
> (note the space after "ext4: ", the lack of a ending period, and the
> spelling correction for "unsed"; the other change which I will
> commonly make for folks, again for consistency, is to make the first
> word after "ext4: " lower case --- the summary does not have to be a
> complete sentence, which is why I remove the trailing period)
I have resent the updated patch.   Thank you very much for your
explanation on the summary.

Yongqiang.
>
> Thanks,
>
>                                                - Ted
>



-- 
Best Wishes
Yongqiang Yang
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html