Re: [PATCH] powerpc: avoid broken GCC __attribute__((optimize))

[Michael Ellerman]

On Wed, 28 Oct 2020 09:04:33 +0100, Ard Biesheuvel wrote:
> Commit 7053f80d9696 ("powerpc/64: Prevent stack protection in early boot")
> introduced a couple of uses of __attribute__((optimize)) with function
> scope, to disable the stack protector in some early boot code.
> 
> Unfortunately, and this is documented in the GCC man pages [0], overriding
> function attributes for optimization is broken, and is only supported for
> debug scenarios, not for production: the problem appears to be that
> setting GCC -f flags using this method will cause it to forget about some
> or all other optimization settings that have been applied.
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc: Avoid broken GCC __attribute__((optimize))
      https://git.kernel.org/powerpc/c/a7223f5bfcaeade4a86d35263493bcda6c940891

cheers