Messages in this thread | | | Date | Sat, 30 Jul 2022 16:33:28 +0200 | From | Greg Kroah-Hartman <> | Subject | Re: [linux-stable-rc:linux-5.15.y 6874/8723] arch/arm/lib/xor-neon.c:30:2: warning: This code requires at least version 4.6 of GCC |
| |
On Mon, Jul 25, 2022 at 04:35:38PM +0200, Arnd Bergmann wrote: > On Mon, Jul 25, 2022 at 2:55 PM Arnd Bergmann <arnd@kernel.org> wrote: > > > The other easy workaround would be to just turn off the xor-neon code > > when building with clang, e.g. using this Makefile hack: > > > > diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile > > index 6d2ba454f25b..8e4fe6421dd2 100644 > > --- a/arch/arm/lib/Makefile > > +++ b/arch/arm/lib/Makefile > > @@ -43,8 +43,10 @@ endif > > $(obj)/csumpartialcopy.o: $(obj)/csumpartialcopygeneric.S > > $(obj)/csumpartialcopyuser.o: $(obj)/csumpartialcopygeneric.S > > > > +ifdef CONFIG_CC_IS_CLANG > > ifeq ($(CONFIG_KERNEL_MODE_NEON),y) > > NEON_FLAGS := -march=armv7-a -mfloat-abi=softfp -mfpu=neon > > CFLAGS_xor-neon.o += $(NEON_FLAGS) > > obj-$(CONFIG_XOR_BLOCKS) += xor-neon.o > > endif > > +endif > > Nevermind, this does not actually work. Just turning off the warning > is probably best then, as actually disabling this code would still > be invasive not do much beyond saving a little bit of kernel .text size.
Ok, if it triggers again, and I get annoyed, I'll write a patch, otherwise I'll just leave it alone unless someone else wants to send it to me...
thanks,
greg k-h
| |