Re: [PATCH] arm64: lse: fix LSE atomics with LLVM's integrated assembler

[Robin Murphy]

On 08/10/2019 16:22, Sami Tolvanen wrote:
> On Mon, Oct 7, 2019 at 2:46 PM 'Nick Desaulniers' via Clang Built
> Linux <clang-built-linux@xxxxxxxxxxxxxxxx> wrote:
> > I'm worried that one of these might lower to LSE atomics without
> > ALTERNATIVE guards by blanketing all C code with `-march=armv8-a+lse`.
>
> True, that's a valid concern. I think adding the directive to each
> assembly block is the way forward then, assuming the maintainers are
> fine with that.

It's definitely a valid concern in principle, but in practice note that 
lse.h ends up included in ~99% of C files, so the extension is enabled 
more or less everywhere already.

(based on a quick hack involving '#pragma message' and grepping the 
build logs)

Robin.