linux-kernel - [PATCH 11/10] arm64: unbreak DYNAMIC

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Message-Id: <20190426190603.5982-1-linux@rasmusvillemoes.dk>
Date:   Fri, 26 Apr 2019 21:06:02 +0200
From:   Rasmus Villemoes <linux@...musvillemoes.dk>
To:     linux-arm-kernel@...ts.infradead.org,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Rasmus Villemoes <linux@...musvillemoes.dk>,
        Will Deacon <will.deacon@....com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Jason Baron <jbaron@...mai.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
Subject: [PATCH 11/10] arm64: unbreak DYNAMIC_DEBUG=y build with clang

Current versions of clang does not like the %c modifier in inline
assembly for targets other than x86, so any DYNAMIC_DEBUG=y build
fails on arm64. A fix is likely to land in 9.0 (see
https://github.com/ClangBuiltLinux/linux/issues/456), but unbreak the
build for older versions.

Fixes: arm64: select DYNAMIC_DEBUG_RELATIVE_POINTERS
Reported-by: Nathan Chancellor <natechancellor@...il.com>
Reported-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
---
Andrew, please apply and/or fold into 9/10.

 arch/arm64/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index d0871d523d5d..315992e33b17 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -83,7 +83,7 @@ config ARM64
 	select CRC32
 	select DCACHE_WORD_ACCESS
 	select DMA_DIRECT_REMAP
-	select DYNAMIC_DEBUG_RELATIVE_POINTERS
+	select DYNAMIC_DEBUG_RELATIVE_POINTERS if CC_IS_GCC || CLANG_VERSION >= 90000
 	select EDAC_SUPPORT
 	select FRAME_POINTER
 	select GENERIC_ALLOCATOR
-- 
2.20.1