linux-kernel - [PATCH] sysctl: Remove redundant assignment to first

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Message-Id: <1620382554-62511-1-git-send-email-jiapeng.chong@linux.alibaba.com>
Date:   Fri,  7 May 2021 18:15:54 +0800
From:   Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
To:     mcgrof@...nel.org
Cc:     keescook@...omium.org, yzaikin@...gle.com, ast@...nel.org,
        daniel@...earbox.net, andrii@...nel.org, kafai@...com,
        songliubraving@...com, yhs@...com, john.fastabend@...il.com,
        kpsingh@...nel.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Subject: [PATCH] sysctl: Remove redundant assignment to first

Variable first is set to '0', but this value is never read as it is
not used later on, hence it is a redundant assignment and can be
removed.

Clean up the following clang-analyzer warning:

kernel/sysctl.c:1562:4: warning: Value stored to 'first' 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>
---
 kernel/sysctl.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 14edf84..58beeba 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1559,7 +1559,6 @@ int proc_do_large_bitmap(struct ctl_table *table, int write,
 			}
 
 			bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1);
-			first = 0;
 			proc_skip_char(&p, &left, '\n');
 		}
 		left += skipped;
-- 
1.8.3.1