linux-kernel - [PATCH] btrfs: Remove redundant assignment to ret

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Message-Id: <1619691320-81639-1-git-send-email-jiapeng.chong@linux.alibaba.com>
Date:   Thu, 29 Apr 2021 18:15:20 +0800
From:   Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
To:     clm@...com
Cc:     josef@...icpanda.com, dsterba@...e.com,
        linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Subject: [PATCH] btrfs: Remove redundant assignment to ret

Variable ret is set to zero but this value is never read as it
is overwritten or not used later on, hence it is a redundant
assignment and can be removed.

Cleans up the following clang-analyzer warning:

fs/btrfs/volumes.c:8019:4: warning: Value stored to 'ret' is never read
[clang-analyzer-deadcode.DeadStores].

fs/btrfs/volumes.c:4757:4: warning: Value stored to 'ret' is never read
[clang-analyzer-deadcode.DeadStores].

fs/btrfs/volumes.c:7951:4: warning: Value stored to 'ret' is never read
[clang-analyzer-deadcode.DeadStores].

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
---
 fs/btrfs/volumes.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 9a1ead0..30504fa 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4754,7 +4754,6 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size)
 			mutex_unlock(&fs_info->reclaim_bgs_lock);
 			if (ret < 0)
 				goto done;
-			ret = 0;
 			btrfs_release_path(path);
 			break;
 		}
@@ -7939,7 +7938,7 @@ int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info)
 	struct btrfs_key key;
 	u64 prev_devid = 0;
 	u64 prev_dev_ext_end = 0;
-	int ret = 0;
+	int ret;
 
 	/*
 	 * We don't have a dev_root because we mounted with ignorebadroots and
@@ -8016,7 +8015,6 @@ int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info)
 		if (ret < 0)
 			goto out;
 		if (ret > 0) {
-			ret = 0;
 			break;
 		}
 	}
-- 
1.8.3.1