Re: [PATCH v2 11/18] arm64: make mrs_s and msr_s macros work with LTO

[Sami Tolvanen]

On Thu, Nov 16, 2017 at 11:54:33AM +0000, Will Deacon wrote:
> What limitations? Can you elaborate please? Is this a fix?

The commit message in v1 was more informative, I'll change this back for v3:

--

Clang's integrated assembler does not allow assembly macros defined
in one inline asm block using the .macro directive to be used across
separate asm blocks. LLVM developers consider this a feature and not a
bug, recommending code refactoring:

https://bugs.llvm.org/show_bug.cgi?id=19749

As binutils doesn't allow macros to be redefined, this change adds C
preprocessor macros that define the assembly macros globally for binutils
and locally for clang's integrated assembler.

Sami