From: Quanyang Wang <[email protected]>
When using arm-linux-gnueabihf-gcc v9.2.0 to compile kernel, there will be
warning info as below:
cc1: warning: switch '-mcpu=cortex-a9' conflicts with '-march=armv7-a' switch
This is because that if "-march" and "-mcpu" options are passed to gcc together,
gcc will check if there is conflict between the two options unconsidering
"quirk"
and "fpu" features. In gcc, the commit e319ca91f665 ("PR target/88799 Add +mp
and +sec extensions to ARMv7-a") add "mp" and "sec" features to "cortex-a9".
So the check will fail because the features in "cortex-a9" and "armv7-a" are no
longer the same.
Since suspend.S doesn't contain any "mp (Multiprocessing Extensions for v7-A
and v7-R architectures)" and "sec" (Security Extensions for v6K and v7-A
architectures) instruction, and "-march=armv7-a" has been defined in
arch/arm/Makefile,
the "-mcpu=cortex-a9" is redudant here.
Signed-off-by: Quanyang Wang <[email protected]>
Signed-off-by: Bruce Ashfield <[email protected]>
---
arch/arm/mach-zynq/Makefile | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm/mach-zynq/Makefile b/arch/arm/mach-zynq/Makefile
index 374207c87f96..dbb75be53deb 100644
--- a/arch/arm/mach-zynq/Makefile
+++ b/arch/arm/mach-zynq/Makefile
@@ -9,5 +9,4 @@ obj-y := common.o efuse.o slcr.o
zynq_ocm.o pm.o
obj-$(CONFIG_SMP) += headsmp.o platsmp.o
ORIG_AFLAGS := $(KBUILD_AFLAGS)
KBUILD_AFLAGS = $(subst -march=armv6k,,$(ORIG_AFLAGS))
-AFLAGS_suspend.o +=-Wa,-march=armv7-a -mcpu=cortex-a9
obj-$(CONFIG_SUSPEND) += suspend.o
--
2.17.1
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