* [PATCH v2] btrfs: zoned: Remove redundant initialization of to_add
@ 2022-01-21 11:43 Jiapeng Chong
2022-01-21 11:48 ` Nikolay Borisov
2022-01-24 19:41 ` David Sterba
0 siblings, 2 replies; 3+ messages in thread
From: Jiapeng Chong @ 2022-01-21 11:43 UTC (permalink / raw)
To: clm; +Cc: josef, dsterba, linux-btrfs, linux-kernel, Jiapeng Chong, Abaci Robot
to_add is being initialized to len but this is never read as
to_add is overwritten later on. Remove the redundant
initialization.
Cleans up the following clang-analyzer warning:
fs/btrfs/extent-tree.c:2769:8: warning: Value stored to 'to_add' during
its initialization is never read [clang-analyzer-deadcode.DeadStores].
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
---
Changes in v2:
-"to_add" is define within the if (!global_rsv->full) branch.
fs/btrfs/extent-tree.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index d89273c4b6b8..8e91adbf352e 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2766,12 +2766,10 @@ static int unpin_extent_range(struct btrfs_fs_info *fs_info,
spin_unlock(&cache->lock);
if (!readonly && return_free_space &&
global_rsv->space_info == space_info) {
- u64 to_add = len;
-
spin_lock(&global_rsv->lock);
if (!global_rsv->full) {
- to_add = min(len, global_rsv->size -
- global_rsv->reserved);
+ u64 to_add = min(len, global_rsv->size -
+ global_rsv->reserved);
global_rsv->reserved += to_add;
btrfs_space_info_update_bytes_may_use(fs_info,
space_info, to_add);
--
2.20.1.7.g153144c
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v2] btrfs: zoned: Remove redundant initialization of to_add
2022-01-21 11:43 [PATCH v2] btrfs: zoned: Remove redundant initialization of to_add Jiapeng Chong
@ 2022-01-21 11:48 ` Nikolay Borisov
2022-01-24 19:41 ` David Sterba
1 sibling, 0 replies; 3+ messages in thread
From: Nikolay Borisov @ 2022-01-21 11:48 UTC (permalink / raw)
To: Jiapeng Chong, clm; +Cc: josef, dsterba, linux-btrfs, linux-kernel, Abaci Robot
On 21.01.22 г. 13:43, Jiapeng Chong wrote:
> to_add is being initialized to len but this is never read as
> to_add is overwritten later on. Remove the redundant
> initialization.
>
> Cleans up the following clang-analyzer warning:
>
> fs/btrfs/extent-tree.c:2769:8: warning: Value stored to 'to_add' during
> its initialization is never read [clang-analyzer-deadcode.DeadStores].
>
> Reported-by: Abaci Robot <abaci@linux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2] btrfs: zoned: Remove redundant initialization of to_add
2022-01-21 11:43 [PATCH v2] btrfs: zoned: Remove redundant initialization of to_add Jiapeng Chong
2022-01-21 11:48 ` Nikolay Borisov
@ 2022-01-24 19:41 ` David Sterba
1 sibling, 0 replies; 3+ messages in thread
From: David Sterba @ 2022-01-24 19:41 UTC (permalink / raw)
To: Jiapeng Chong; +Cc: clm, josef, dsterba, linux-btrfs, linux-kernel, Abaci Robot
On Fri, Jan 21, 2022 at 07:43:51PM +0800, Jiapeng Chong wrote:
> to_add is being initialized to len but this is never read as
> to_add is overwritten later on. Remove the redundant
> initialization.
>
> Cleans up the following clang-analyzer warning:
>
> fs/btrfs/extent-tree.c:2769:8: warning: Value stored to 'to_add' during
> its initialization is never read [clang-analyzer-deadcode.DeadStores].
>
> Reported-by: Abaci Robot <abaci@linux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Added to misc-next, thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2022-01-21 11:48 ` Nikolay Borisov
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