Re: [PATCH 11/10] arm64: unbreak DYNAMIC_DEBUG=y build with clang

Rasmus Villemoes
2019-05-02T08:57:30Z

On 30/04/2019 20.22, Nick Desaulniers wrote:
> On Mon, Apr 29, 2019 at 10:32 AM Nick Desaulniers
> <ndesaulniers@google.com> wrote:
>>
>> On Fri, Apr 26, 2019 at 12:06 PM Rasmus Villemoes
>> <linux@rasmusvillemoes.dk> wrote:
>>>
>>> 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@gmail.com>
>>> Reported-by: Arnd Bergmann <arnd@arndb.de>
>>> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
>>> ---
>>> Andrew, please apply and/or fold into 9/10.

Andrew, friendly ping.

>>> 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
>>
>> I just landed the fix for this in Clang, I think around the time you
>> sent the patch. Should ship in Clang 9. Thanks for unbreaking our
>> build.

Sorry for breaking it in the first place :-/

Rasmus