From cb86a41b35c8f5da93ee7370c11634b57509d22b Mon Sep 17 00:00:00 2001 From: Mark Rutland Date: Wed, 13 Apr 2022 15:59:06 +0100 Subject: arm64: stacktrace: delete PCS comment The comment at the top of stacktrace.c isn't all that helpful, as it's not associated with the code which inspects the frame record, and the code example isn't representative of common code generation today. Delete it. There should be no functional change as a result of this patch. Signed-off-by: Mark Rutland Cc: Madhavan T. Venkataraman Cc: Mark Brown Cc: Will Deacon Reviewed-by: Madhavan T. Venkataraman Reviewed-by: Mark Brown Reviewed-by: Kalesh Singh for the series. Link: https://lore.kernel.org/r/20220413145910.3060139-3-mark.rutland@arm.com Signed-off-by: Catalin Marinas --- arch/arm64/kernel/stacktrace.c | 15 --------------- 1 file changed, 15 deletions(-) (limited to 'arch/arm64/kernel/stacktrace.c') diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c index 94932ade5c79..08af9ca9a845 100644 --- a/arch/arm64/kernel/stacktrace.c +++ b/arch/arm64/kernel/stacktrace.c @@ -18,21 +18,6 @@ #include #include -/* - * AArch64 PCS assigns the frame pointer to x29. - * - * A simple function prologue looks like this: - * sub sp, sp, #0x10 - * stp x29, x30, [sp] - * mov x29, sp - * - * A simple function epilogue looks like this: - * mov sp, x29 - * ldp x29, x30, [sp] - * add sp, sp, #0x10 - */ - - static notrace void start_backtrace(struct stackframe *frame, unsigned long fp, unsigned long pc) { -- cgit v1.2.3