| From a14d37dede08a65d5b5e4f70adabce7f4f1bf0e6 Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Sat, 4 Jan 2020 13:00:02 -0800 |
| Subject: hexagon: work around compiler crash |
| |
| From: Nick Desaulniers <ndesaulniers@google.com> |
| |
| [ Upstream commit 63e80314ab7cf4783526d2e44ee57a90514911c9 ] |
| |
| Clang cannot translate the string "r30" into a valid register yet. |
| |
| Link: https://github.com/ClangBuiltLinux/linux/issues/755 |
| Link: http://lkml.kernel.org/r/20191028155722.23419-1-ndesaulniers@google.com |
| Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> |
| Suggested-by: Sid Manning <sidneym@quicinc.com> |
| Reviewed-by: Brian Cain <bcain@codeaurora.org> |
| Cc: Allison Randal <allison@lohutok.net> |
| Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| Cc: Richard Fontana <rfontana@redhat.com> |
| Cc: Thomas Gleixner <tglx@linutronix.de> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| arch/hexagon/kernel/stacktrace.c | 4 +--- |
| 1 file changed, 1 insertion(+), 3 deletions(-) |
| |
| diff --git a/arch/hexagon/kernel/stacktrace.c b/arch/hexagon/kernel/stacktrace.c |
| index 35f29423fda8..5ed02f699479 100644 |
| --- a/arch/hexagon/kernel/stacktrace.c |
| +++ b/arch/hexagon/kernel/stacktrace.c |
| @@ -11,8 +11,6 @@ |
| #include <linux/thread_info.h> |
| #include <linux/module.h> |
| |
| -register unsigned long current_frame_pointer asm("r30"); |
| - |
| struct stackframe { |
| unsigned long fp; |
| unsigned long rets; |
| @@ -30,7 +28,7 @@ void save_stack_trace(struct stack_trace *trace) |
| |
| low = (unsigned long)task_stack_page(current); |
| high = low + THREAD_SIZE; |
| - fp = current_frame_pointer; |
| + fp = (unsigned long)__builtin_frame_address(0); |
| |
| while (fp >= low && fp <= (high - sizeof(*frame))) { |
| frame = (struct stackframe *)fp; |
| -- |
| 2.20.1 |
| |
