tree ca9bd84c3629bc166f407c34055eb809e416d430
parent 771e03842a9e98a1c2013ca1ed8bb2793488f3e5
author Shan Wei <davidshan@tencent.com> 1352771584 +0800
committer Steven Rostedt <rostedt@goodmis.org> 1358792550 -0500

tracing: Use this_cpu_ptr per-cpu helper

typeof(&buffer) is a pointer to array of 1024 char, or char (*)[1024].
But, typeof(&buffer[0]) is a pointer to char which match the return type of get_trace_buf().
As well-known, the value of &buffer is equal to &buffer[0].
so return this_cpu_ptr(&percpu_buffer->buffer[0]) can avoid type cast.

Link: http://lkml.kernel.org/r/50A1A800.3020102@gmail.com

Reviewed-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Shan Wei <davidshan@tencent.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>