From: Shaohua Li <shli@fb.com>
Date: Tue, 27 Sep 2016 15:42:41 +0000 (-0700)
Subject: bpf: clean up put_cpu_var usage
X-Git-Tag: v4.9-rc1~127^2~47
X-Git-Url: https://git.kernelconcepts.de/?a=commitdiff_plain;h=b761fe226be61eba6ae20a424b288559b8a606b5;p=karo-tx-linux.git

bpf: clean up put_cpu_var usage

put_cpu_var takes the percpu data, not the data returned from
get_cpu_var.

This doesn't change the behavior.

Cc: Tejun Heo <tj@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 7b7baaed9ed4..aa6d98154106 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -1031,7 +1031,7 @@ BPF_CALL_0(bpf_user_rnd_u32)
 
 	state = &get_cpu_var(bpf_user_rnd_state);
 	res = prandom_u32_state(state);
-	put_cpu_var(state);
+	put_cpu_var(bpf_user_rnd_state);
 
 	return res;
 }