Messages in this thread Patch in this message |  | | From | Rui Salvaterra <> | Subject | [RFC] [PATCH] arch: x86: change GCC optimisation target from atom to bonnell | Date | Mon, 10 Oct 2016 22:45:38 +0100 |
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Hi, Thomas, Ingo, Peter,
(Sending as RFC, since I don't know if this patch is acceptable.)
The GCC team has deprecated atom as a march/mtune target since almost three years ago, according to this mailing list thread [1], in favour of specific microarchitecture names (bonnell, silvermont). This patch changes the Atom optimisation target in the kernel to bonnell, as it was originally intended.
Tested on an x86-64 Atom 330 machine. No functional changes.
[1] https://gcc.gnu.org/ml/gcc-patches/2013-12/msg01805.html
Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com> --- arch/x86/Makefile | 4 ++-- arch/x86/Makefile_32.cpu | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 2d44933..b7d615f 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -109,8 +109,8 @@ else cflags-$(CONFIG_MCORE2) += \ $(call cc-option,-march=core2,$(call cc-option,-mtune=generic)) - cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \ - $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) + cflags-$(CONFIG_MATOM) += $(call cc-option,-march=bonnell) \ + $(call cc-option,-mtune=bonnell,$(call cc-option,-mtune=generic)) cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic) KBUILD_CFLAGS += $(cflags-y) diff --git a/arch/x86/Makefile_32.cpu b/arch/x86/Makefile_32.cpu index 6647ed4..d66e5e3 100644 --- a/arch/x86/Makefile_32.cpu +++ b/arch/x86/Makefile_32.cpu @@ -32,8 +32,8 @@ cflags-$(CONFIG_MCYRIXIII) += $(call cc-option,-march=c3,-march=i486) $(align)-f cflags-$(CONFIG_MVIAC3_2) += $(call cc-option,-march=c3-2,-march=i686) cflags-$(CONFIG_MVIAC7) += -march=i686 cflags-$(CONFIG_MCORE2) += -march=i686 $(call tune,core2) -cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom,$(call cc-option,-march=core2,-march=i686)) \ - $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic)) +cflags-$(CONFIG_MATOM) += $(call cc-option,-march=bonnell,$(call cc-option,-march=core2,-march=i686)) \ + $(call cc-option,-mtune=bonnell,$(call cc-option,-mtune=generic)) # AMD Elan support cflags-$(CONFIG_MELAN) += -march=i486 -- 2.10.1
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