From: akpm@linux-foundation.org
To: akpm@linux-foundation.org, allison@lohutok.net,
bcain@codeaurora.org, gregkh@linuxfoundation.org,
linux-mm@kvack.org, mm-commits@vger.kernel.org,
ndesaulniers@google.com, rfontana@redhat.com,
sidneym@quicinc.com, tglx@linutronix.de,
torvalds@linux-foundation.org
Subject: [patch 10/17] hexagon: work around compiler crash
Date: Sat, 04 Jan 2020 13:00:02 -0800 [thread overview]
Message-ID: <20200104210002.sRLfEoLh6%akpm@linux-foundation.org> (raw)
From: Nick Desaulniers <ndesaulniers@google.com>
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@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>
---
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;
_
reply other threads:[~2020-01-04 21:00 UTC|newest]
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