linux-kernel - [PATCH bpf-next] bpf: Remove set but not used variable 'first

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Date:   Thu, 16 Jan 2020 22:53:00 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <ast@...nel.org>, <daniel@...earbox.net>, <kafai@...com>,
        <songliubraving@...com>, <yhs@...com>, <andriin@...com>,
        <brianvv@...gle.com>
CC:     <netdev@...r.kernel.org>, <bpf@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, YueHaibing <yuehaibing@...wei.com>
Subject: [PATCH bpf-next] bpf: Remove set but not used variable 'first_key'

kernel/bpf/syscall.c: In function generic_map_lookup_batch:
kernel/bpf/syscall.c:1339:7: warning: variable first_key set but not used [-Wunused-but-set-variable]

It is never used, so remove it.

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 kernel/bpf/syscall.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 0d94d36..c26a714 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -1336,7 +1336,6 @@ int generic_map_lookup_batch(struct bpf_map *map,
 	void *buf, *buf_prevkey, *prev_key, *key, *value;
 	int err, retry = MAP_LOOKUP_RETRIES;
 	u32 value_size, cp, max_count;
-	bool first_key = false;
 
 	if (attr->batch.elem_flags & ~BPF_F_LOCK)
 		return -EINVAL;
@@ -1365,7 +1364,6 @@ int generic_map_lookup_batch(struct bpf_map *map,
 	}
 
 	err = -EFAULT;
-	first_key = false;
 	prev_key = NULL;
 	if (ubatch && copy_from_user(buf_prevkey, ubatch, map->key_size))
 		goto free_buf;
-- 
2.7.4