From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Subject: [PATCH AUTOSEL 4.4 2/3] hexagon: work around compiler crash Date: Fri, 10 Jan 2020 17:07:38 -0500 Message-ID: <20200110220739.28883-2-sashal@kernel.org> References: <20200110220739.28883-1-sashal@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578694063; bh=sj6N5pE2/82h7vfPvxKma1ckeCsu0WweTBH31NIC6AI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cOMot84PpLkxB7a9+jfnqpYbzu9Z1AO7Yk7SXmmPhmNan/WPbwQwfQjJE5XJdcnMa 8oNo45HqprW+8nK/sC3NeK3l9fuoj5GXXUhiPo4vDRSQYxI+MhMQ7SQff+f/shk5lw xLYH7UgSfvpJ5P8g2p+iCpg9GfkBMmI5dLX/L8Jg= In-Reply-To: <20200110220739.28883-1-sashal@kernel.org> Sender: linux-hexagon-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Nick Desaulniers , Sid Manning , Brian Cain , Allison Randal , Greg Kroah-Hartman , Richard Fontana , Thomas Gleixner , Andrew Morton , Linus Torvalds , Sasha Levin , linux-hexagon@vger.kernel.org, clang-built-linux@googlegroups.com From: Nick Desaulniers [ 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 Suggested-by: Sid Manning Reviewed-by: Brian Cain Cc: Allison Randal Cc: Greg Kroah-Hartman Cc: Richard Fontana Cc: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- 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 #include -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