Re: [PATCH v5 00/18] Rework READ_ONCE() to improve codegen

From: Borislav Petkov
Date: Wed Jun 03 2020 - 14:52:32 EST

On Thu, May 14, 2020 at 12:05:38PM +0100, Will Deacon wrote:
> Talking off-list, Clang >= 7 is pretty reasonable wrt inlining decisions
> and the behaviour for __always_inline is:
> * An __always_inline function inlined into a __no_sanitize function is
> not instrumented
> * An __always_inline function inlined into an instrumented function is
> instrumented
> * You can't mark a function as both __always_inline __no_sanitize, because
> __no_sanitize functions are never inlined
> GCC, on the other hand, may still inline __no_sanitize functions and then
> subsequently instrument them.

Yeah, about that: I've been looking for a way to trigger this so that
I can show preprocessed source to gcc people. So do you guys have a
.config or somesuch I can try?