The patch titled
Subject: hexagon: work around compiler crash
has been added to the -mm tree. Its filename is
hexagon-work-around-compiler-crash.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/hexagon-work-around-compiler-crash.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/hexagon-work-around-compiler-crash.patch
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------------------------------------------------------
From: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Subject: hexagon: work around compiler crash
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@xxxxxxxxxx
Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Suggested-by: Sid Manning <sidneym@xxxxxxxxxxx>
Reviewed-by: Brian Cain <bcain@xxxxxxxxxxxxxx>
Cc: Allison Randal <allison@xxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Richard Fontana <rfontana@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/hexagon/kernel/stacktrace.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/arch/hexagon/kernel/stacktrace.c~hexagon-work-around-compiler-crash
+++ a/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
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;
_
Patches currently in -mm which might be from ndesaulniers@xxxxxxxxxx are
hexagon-define-ioremap_uc.patch
hexagon-parenthesize-registers-in-asm-predicates.patch
hexagon-work-around-compiler-crash.patch
