GCC 9 introduces a new option, -flive-patching. It disables certain optimizations which could make a compilation unsafe for later live patching of the running kernel.
The option is used only if CONFIG_LIVEPATCH is enabled and $(CC) supports it. Signed-off-by: Miroslav Benes <[email protected]> --- Makefile | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Makefile b/Makefile index a0650bf79606..53f5ab810efe 100644 --- a/Makefile +++ b/Makefile @@ -778,6 +778,10 @@ KBUILD_CFLAGS_KERNEL += $(call cc-option,-ffunction-sections,) KBUILD_CFLAGS_KERNEL += $(call cc-option,-fdata-sections,) endif +ifdef CONFIG_LIVEPATCH +KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) +endif + # arch Makefile may override CC so keep this after arch Makefile is included NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) -- 2.19.2
