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Commit 112677d6 authored by Namhyung Kim's avatar Namhyung Kim Committed by Thomas Gleixner
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x86/ftrace: Add comment on static function tracing 



There was a confusion between update_ftrace_function() and static
function tracing trampoline regarding 3rd parameter (ftrace_ops).
Add a comment for clarification.

Suggested-by: default avatarSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1447721004-2551-1-git-send-email-namhyung@kernel.org


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent a05917b6

arch/x86/kernel/mcount_64.S

+6 −0
Original line number Diff line number Diff line
@@ -278,6 +278,12 @@ trace: 
	/* save_mcount_regs fills in first two parameters */

	save_mcount_regs



	/*

	 * When DYNAMIC_FTRACE is not defined, ARCH_SUPPORTS_FTRACE_OPS is not

	 * set (see include/asm/ftrace.h and include/linux/ftrace.h).  Only the

	 * ip and parent ip are used and the list function is called when

	 * function tracing is enabled.

	 */

	call   *ftrace_trace_function



	restore_mcount_regs