Commit 1e0924bd authored by Masami Hiramatsu's avatar Masami Hiramatsu Committed by Catalin Marinas
Browse files

arm64: Mark start_backtrace() notrace and NOKPROBE_SYMBOL 



Mark the start_backtrace() as notrace and NOKPROBE_SYMBOL
because this function is called from ftrace and lockdep to
get the caller address via return_address(). The lockdep
is used in kprobes, it should also be NOKPROBE_SYMBOL.

Fixes: b07f3499 ("arm64: stacktrace: Move start_backtrace() out of the header")
Cc: <stable@vger.kernel.org> # 5.13.x
Signed-off-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/164301227374.1433152.12808232644267107415.stgit@devnote2


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent eb30d838

arch/arm64/kernel/stacktrace.c

+3 −2
Original line number Diff line number Diff line
@@ -33,7 +33,7 @@ 
 */





static void start_backtrace(struct stackframe *frame, unsigned long fp,

static notrace void start_backtrace(struct stackframe *frame, unsigned long fp,

				    unsigned long pc)

{

	frame->fp = fp;
@@ -55,6 +55,7 @@ static void start_backtrace(struct stackframe *frame, unsigned long fp, 
	frame->prev_fp = 0;

	frame->prev_type = STACK_TYPE_UNKNOWN;

}

NOKPROBE_SYMBOL(start_backtrace);



/*

 * Unwind from one frame record (A) to the next frame record (B).