rockchip: build kernel with -O3 optimization

This commit is contained in:
sbwml 2023-01-11 01:01:21 +08:00
parent 34df2da64e
commit 19d70f9707
2 changed files with 43 additions and 0 deletions

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@ -120,6 +120,8 @@ CONFIG_BSD_PROCESS_ACCT_V3=y
# CONFIG_CACHEFILES_ONDEMAND is not set
CONFIG_CC_HAVE_STACKPROTECTOR_SYSREG=y
CONFIG_CC_IMPLICIT_FALLTHROUGH="-Wimplicit-fallthrough=5"
# CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE is not set
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3=y
CONFIG_CHARGER_GPIO=y
CONFIG_CHR_DEV_SG=y
CONFIG_CLKSRC_MMIO=y

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@ -0,0 +1,41 @@
diff --git a/Makefile b/Makefile
index 56afd1509..10b3a59b4 100644
--- a/Makefile
+++ b/Makefile
@@ -823,6 +823,9 @@ KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
KBUILD_CFLAGS += -O2
KBUILD_RUSTFLAGS += -Copt-level=2
+else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
+KBUILD_CFLAGS += -O3
+KBUILD_RUSTFLAGS += -Copt-level=3
else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
KBUILD_CFLAGS += -Os
KBUILD_RUSTFLAGS += -Copt-level=s
diff --git a/init/Kconfig b/init/Kconfig
index 94125d3b6..8ecbc5e96 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1405,7 +1405,7 @@ config INITRAMFS_PRESERVE_MTIME
choice
prompt "Compiler optimization level"
- default CC_OPTIMIZE_FOR_PERFORMANCE
+ default CC_OPTIMIZE_FOR_PERFORMANCE_O3
config CC_OPTIMIZE_FOR_PERFORMANCE
bool "Optimize for performance (-O2)"
@@ -1414,6 +1414,13 @@ config CC_OPTIMIZE_FOR_PERFORMANCE
with the "-O2" compiler flag for best performance and most
helpful compile-time warnings.
+config CC_OPTIMIZE_FOR_PERFORMANCE_O3
+ bool "Optimize more for performance (-O3)"
+ imply CC_DISABLE_WARN_MAYBE_UNINITIALIZED
+ help
+ Choosing this option will pass "-O3" to your compiler to optimize
+ the kernel yet more for performance.
+
config CC_OPTIMIZE_FOR_SIZE
bool "Optimize for size (-Os)"
help