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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@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>
This commit is contained in:
Nick Desaulniers 2020-01-04 13:00:02 -08:00 committed by Linus Torvalds
parent 780a0cfda9
commit 63e80314ab
1 changed files with 1 additions and 3 deletions
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4
arch/hexagon/kernel/stacktrace.c
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@ -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;