On Thu, 25 Feb 2021 12:03:48 -0800 Kees Cook <keesc...@chromium.org> wrote:
> On Thu, Feb 25, 2021 at 05:45:09PM +0100, Arnd Bergmann wrote:
> > From: Arnd Bergmann <a...@arndb.de>
> >
> > Separating compiler-clang.h from compiler-gcc.h inadventently dropped the
> > definitions of the three HAVE_BUILTIN_BSWAP macros, which requires falling
> > back to the open-coded version and hoping that the compiler detects it.
> >
> > Since all versions of clang support the __builtin_bswap interfaces,
> > add back the flags and have the headers pick these up automatically.
> >
> > This results in a 4% improvement of compilation speed for arm defconfig.
> >
> > Fixes: 815f0ddb346c ("include/linux/compiler*.h: make compiler-*.h mutually
> > exclusive")
> > Signed-off-by: Arnd Bergmann <a...@arndb.de>
>
> Cc: sta...@vger.kernel.org
I figured 4% better compile time isn't significant enough to justify a
backport. Thoughts?
> Reviewed-by: Kees Cook <keesc...@chromium.org>
