From: Michael Ellerman Date: Thu, 20 Oct 2016 05:00:14 +0000 (+1100) Subject: powerpc/book3s64: Always build for power4 or later X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3a849815a13695ad0e32f6f01c90544922a72229;p=linux-beck.git powerpc/book3s64: Always build for power4 or later When we're not compiling for a specific CPU, ie. none of the CONFIG_POWERx_CPU options are set, and CONFIG_GENERIC_CPU *is* set, we currently don't pass any -mcpu option to the compiler. This means the compiler builds for a "generic" Power CPU. But back in 2014 we dropped support for pre power4 CPUs in commit 468a33028edd ("powerpc: Drop support for pre-POWER4 cpus"). Given that, there's no point in building the kernel to run on pre power4 cpus. So update the flags we pass to the compiler when CONFIG_GENERIC_CPU is set, to specify -mcpu=power4. Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index 617dece67924..041fda1e2a5d 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -121,6 +121,7 @@ CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD) ifeq ($(CONFIG_PPC_BOOK3S_64),y) CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4) +CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4 else CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 endif