Messages in this thread | | | Date | Sun, 31 Jul 2022 12:13:14 +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 |
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On Sun, Jul 31, 2022 at 01:15:59AM +0200, Jason A. Donenfeld wrote: > On Sat, Jul 30, 2022 at 04:33:28PM +0200, Greg Kroah-Hartman wrote: > > 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... > > The patch is trivial, if your idea is just to remove the #warning, > right? Might as well just do it now and get it over with.
Fine, I was being lazy :)
Now sent out: https://lore.kernel.org/all/20220731100551.3679874-1-gregkh@linuxfoundation.org/
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