On Thu, 25 Feb 2021 12:03:48 -0800 Kees Cook <[email protected]> wrote:
> On Thu, Feb 25, 2021 at 05:45:09PM +0100, Arnd Bergmann wrote: > > From: Arnd Bergmann <[email protected]> > > > > 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 <[email protected]> > > Cc: [email protected] I figured 4% better compile time isn't significant enough to justify a backport. Thoughts? > Reviewed-by: Kees Cook <[email protected]>
