tracing: Don't use the address of the buffer array name in copy_from_user
authorWang Xiaoqiang <wangxq10@lzu.edu.cn>
Mon, 18 Apr 2016 07:23:29 +0000 (15:23 +0800)
committerSteven Rostedt <rostedt@goodmis.org>
Tue, 26 Apr 2016 18:42:03 +0000 (14:42 -0400)
commit4afe6495e5cb3c352d95f07512cbb227e607e2ce
tree8b3590a165e3b47f70e33d68db9b059769e7ef88
parent6e4cf657defa8fb06dbf9ed91adb78414758f259
tracing: Don't use the address of the buffer array name in copy_from_user

With the following code snippet:

    ...
    char buf[64];
    ...
    if (copy_from_user(&buf, ubuf, cnt))
    ...

Even though the value of "&buf" equals "buf", but there is no need
to get the address of the "buf" again. Use "buf" instead of "&buf".

Link: http://lkml.kernel.org/r/20160418152329.18b72bea@debian
Signed-off-by: Wang Xiaoqiang <wangxq10@lzu.edu.cn>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
kernel/trace/trace.c