Commit f28439db authored by Naveen N. Rao's avatar Naveen N. Rao Committed by Steven Rostedt
Browse files

tracing: Tag trace_percpu_buffer as a percpu pointer 

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: default avatarkernel test robot <lkp@intel.com>
Fixes: 07d777fe ("tracing: Add percpu buffers for trace_printk()")
Signed-off-by: default avatarNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 823e670f

kernel/trace/trace.c

+2 −2
Original line number Diff line number Diff line
@@ -3207,7 +3207,7 @@ struct trace_buffer_struct { 
	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
@@ -3236,7 +3236,7 @@ static void put_trace_buf(void) 


static int alloc_percpu_trace_buffer(void)

{

	struct trace_buffer_struct *buffers;

	struct trace_buffer_struct __percpu *buffers;



	if (trace_percpu_buffer)

		return 0;