| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 38/76] hexagon: work around compiler crash | Date | Wed, 22 Jan 2020 10:28:54 +0100 |
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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 f94918b449a8..03a0e10ecdcc 100644 --- a/arch/hexagon/kernel/stacktrace.c +++ b/arch/hexagon/kernel/stacktrace.c @@ -23,8 +23,6 @@ #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; @@ -42,7 +40,7 @@ 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
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