[PATCH v2 18/18] arm64: select ARCH_SUPPORTS_LTO_CLANG

[Peter Zijlstra]

On Mon, Nov 20, 2017 at 06:05:55PM +0000, Will Deacon wrote:
> Although the current direction of the C++ committee is to prefer
> that dependencies are explicitly "marked", this is not deemed to be
> acceptable for the kernel (in other words, everything is always considered
> "marked").

Yeah, that is an attitude not compatible with existing code. Much like
the proposal to allow temporary/wide stores on everything not explicitly
declared atomic. Such stuff instantly breaks all extant code that does
multi-threading with no recourse.