[PATCH] ARM: sunxi: Fix multi-cluster SMP support compilation in multi v6/v7 configs
maxime.ripard at bootlin.com
Mon Feb 19 00:05:11 PST 2018
On Sat, Feb 17, 2018 at 01:01:12PM +0800, Chen-Yu Tsai wrote:
> Various parts of the assembly code used in the multi-cluster SMP support
> requires ARMv7-A. If the kernel config also has multi v6 support enabled,
> Kbuild defaults to building for armv6k, which does not support some of
> the instructions we use.
> Configure the Makefile such that the multi-cluster SMP code is always
> built for ARMv7-A. This is also what mach-exynos does for their MC-SMP
> Signed-off-by: Chen-Yu Tsai <wens at csie.org>
> This addresses "[sunxi:sunxi/core-for-4.17 1/4] /tmp/ccSQM2rD.s:438:
> Error: selected processor does not support `isb' in ARM mode"
> reported by the kbuild test robot for arm-allmodconfig.
> Should we apply it, or squash it in the original patch?
I guess we can squash it. And while you're at it..
> arch/arm/mach-sunxi/Makefile | 1 +
> 1 file changed, 1 insertion(+)
> diff --git a/arch/arm/mach-sunxi/Makefile b/arch/arm/mach-sunxi/Makefile
> index 3e741e959c7c..3c2c4384357a 100644
> --- a/arch/arm/mach-sunxi/Makefile
> +++ b/arch/arm/mach-sunxi/Makefile
> @@ -1,3 +1,4 @@
> obj-$(CONFIG_ARCH_SUNXI) += sunxi.o
> obj-$(CONFIG_ARCH_SUNXI_MC_SMP) += mc_smp.o
> +CFLAGS_mc_smp.o += -march=armv7-a
Can you move it to the first line of the file (before the other obj-*)
with a newline after it?
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
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