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