On Fri, 01 Aug 2025 10:20:05 +0200, Thomas Huth wrote:

The kernel Makefiles define the __ASSEMBLY__ macro to provide
a way to use headers in both, assembly and C source code. This is bad
since macros starting with two underscores are names that are reserved
by the C language.
Additionally, all the supported versions of the GCC and Clang compilers
also define the macro __ASSEMBLER__ automatically already when compiling
assembly code, so some kernel headers are using __ASSEMBLER__ instead.
With regards to userspace code, this seems also to be constant source
of confusion, see for example these links here:

[...]

Applied to powerpc/next.

[1/2] powerpc: Replace __ASSEMBLY__ with __ASSEMBLER__ in uapi headers
      https://git.kernel.org/powerpc/c/8e0665eb85394ea9823fb965a73ae9a6265af4b0
[2/2] powerpc: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-uapi headers
      https://git.kernel.org/powerpc/c/74db6cc331b0da5c48c62b7af68d747ec9af1984

Thanks