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tracing: Tag trace_percpu_buffer as a percpu pointer

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Tag trace_percpu_buffer as a percpu pointer to resolve warnings
reported by sparse:
  /linux/kernel/trace/trace.c:3218:46: warning: incorrect type in initializer (different address spaces)
  /linux/kernel/trace/trace.c:3218:46:    expected void const [noderef] __percpu *__vpp_verify
  /linux/kernel/trace/trace.c:3218:46:    got struct trace_buffer_struct *
  /linux/kernel/trace/trace.c:3234:9: warning: incorrect type in initializer (different address spaces)
  /linux/kernel/trace/trace.c:3234:9:    expected void const [noderef] __percpu *__vpp_verify
  /linux/kernel/trace/trace.c:3234:9:    got int *

Link: https://lkml.kernel.org/r/ebabd3f23101d89cb75671b68b6f819f5edc830b.1640255304.git.naveen.n.rao@linux.vnet.ibm.com

Cc: stable@vger.kernel.org
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 07d777fe8c ("tracing: Add percpu buffers for trace_printk()")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Naveen N. Rao 2021-12-23 16:04:39 +05:30 committed by Steven Rostedt
parent 823e670f7e
commit f28439db47
1 changed files with 2 additions and 2 deletions
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4
kernel/trace/trace.c
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@ -3207,7 +3207,7 @@ struct trace_buffer_struct {
char buffer[4][TRACE_BUF_SIZE]; char buffer[4][TRACE_BUF_SIZE];
}; };
static struct trace_buffer_struct *trace_percpu_buffer; static struct trace_buffer_struct __percpu *trace_percpu_buffer;
/* /*
* This allows for lockless recording. If we're nested too deeply, then * This allows for lockless recording. If we're nested too deeply, then
@ -3236,7 +3236,7 @@ static void put_trace_buf(void)
static int alloc_percpu_trace_buffer(void) static int alloc_percpu_trace_buffer(void)
{ {
struct trace_buffer_struct *buffers; struct trace_buffer_struct __percpu *buffers;
if (trace_percpu_buffer) if (trace_percpu_buffer)
return 0; return 0;