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kernel: use KCFLAGS for passing EXTRA_OPTIMIZATION flags

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This uses kernel's generic variable and doesn't require patching it with
a custom Makefile change. It's expected *not* to change any behaviour.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
This commit is contained in:
Rafał Miłecki 2022-06-15 10:41:37 +02:00
parent 77692d6112
commit 1d42af720c
3 changed files with 7 additions and 19 deletions
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2
include/kernel.mk
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@ -101,7 +101,7 @@ endif
KERNEL_MAKE = $(MAKE) $(KERNEL_MAKEOPTS) KERNEL_MAKE = $(MAKE) $(KERNEL_MAKEOPTS)
KERNEL_MAKE_FLAGS = \ KERNEL_MAKE_FLAGS = \
KCFLAGS="$(call iremap,$(BUILD_DIR),$(notdir $(BUILD_DIR)))" \ KCFLAGS="$(call iremap,$(BUILD_DIR),$(notdir $(BUILD_DIR))) $(call qstrip,$(CONFIG_EXTRA_OPTIMIZATION))" \
HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \ HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
CROSS_COMPILE="$(KERNEL_CROSS)" \ CROSS_COMPILE="$(KERNEL_CROSS)" \
ARCH="$(LINUX_KARCH)" \ ARCH="$(LINUX_KARCH)" \

12
target/linux/generic/pending-5.10/201-extra_optimization.patch
View File

@ -14,18 +14,12 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
--- a/Makefile --- a/Makefile
+++ b/Makefile +++ b/Makefile
@@ -735,11 +735,11 @@ KBUILD_CFLAGS += $(call cc-disable-warni @@ -739,7 +739,7 @@ KBUILD_CFLAGS += -O2
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
-KBUILD_CFLAGS += -O2
+KBUILD_CFLAGS += -O2 $(EXTRA_OPTIMIZATION)
else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
-KBUILD_CFLAGS += -O3 KBUILD_CFLAGS += -O3
+KBUILD_CFLAGS += -O3 $(EXTRA_OPTIMIZATION)
else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
-KBUILD_CFLAGS += -Os -KBUILD_CFLAGS += -Os
+KBUILD_CFLAGS += -Os -fno-reorder-blocks -fno-tree-ch $(EXTRA_OPTIMIZATION) +KBUILD_CFLAGS += -Os -fno-reorder-blocks -fno-tree-ch
endif endif
# Tell gcc to never replace conditional load with a non-conditional one # Tell gcc to never replace conditional load with a non-conditional one

12
target/linux/generic/pending-5.15/201-extra_optimization.patch
View File

@ -14,18 +14,12 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
--- a/Makefile --- a/Makefile
+++ b/Makefile +++ b/Makefile
@@ -752,11 +752,11 @@ KBUILD_CFLAGS += $(call cc-disable-warni @@ -756,7 +756,7 @@ KBUILD_CFLAGS += -O2
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
-KBUILD_CFLAGS += -O2
+KBUILD_CFLAGS += -O2 $(EXTRA_OPTIMIZATION)
else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
-KBUILD_CFLAGS += -O3 KBUILD_CFLAGS += -O3
+KBUILD_CFLAGS += -O3 $(EXTRA_OPTIMIZATION)
else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
-KBUILD_CFLAGS += -Os -KBUILD_CFLAGS += -Os
+KBUILD_CFLAGS += -Os -fno-reorder-blocks -fno-tree-ch $(EXTRA_OPTIMIZATION) +KBUILD_CFLAGS += -Os -fno-reorder-blocks -fno-tree-ch
endif endif
# Tell gcc to never replace conditional load with a non-conditional one # Tell gcc to never replace conditional load with a non-conditional one