From: Petr Pavlu Date: Fri, 20 Jun 2025 15:45:49 +0000 (+0200) Subject: s390/boot: Use -D__DISABLE_EXPORTS X-Git-Tag: v6.17-rc1~133^2~15 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=819275e18112f682d9ca9b66190fc714a2910a53;p=thirdparty%2Fkernel%2Fstable.git s390/boot: Use -D__DISABLE_EXPORTS Files in the arch/s390/boot directory reuse logic from the rest of the kernel by including certain C and assembly files from the kernel and lib directories. Some of these included files contain EXPORT_SYMBOL directives. For instance, arch/s390/boot/cmdline.c includes lib/cmdline.c, which exports the get_option() function. This inclusion triggers genksyms processing for the files in arch/s390/boot, which is unnecessary and slows down the build. Additionally, when KBUILD_SYMTYPES=1 is set, the generated symtypes data contain exported symbols that are duplicated with the main kernel. This duplication can confuse external kABI tools that process the symtypes data. Address this issue by compiling the files in arch/s390/boot with -D__DISABLE_EXPORTS. Signed-off-by: Petr Pavlu Reviewed-by: Heiko Carstens Link: https://lore.kernel.org/r/20250620154649.116068-1-petr.pavlu@suse.com Signed-off-by: Alexander Gordeev --- diff --git a/arch/s390/boot/Makefile b/arch/s390/boot/Makefile index bee49626be4b..0986c7c67eaf 100644 --- a/arch/s390/boot/Makefile +++ b/arch/s390/boot/Makefile @@ -19,8 +19,8 @@ CC_FLAGS_MARCH_MINIMUM := -march=z10 KBUILD_AFLAGS := $(filter-out $(CC_FLAGS_MARCH),$(KBUILD_AFLAGS_DECOMPRESSOR)) KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_MARCH),$(KBUILD_CFLAGS_DECOMPRESSOR)) -KBUILD_AFLAGS += $(CC_FLAGS_MARCH_MINIMUM) -KBUILD_CFLAGS += $(CC_FLAGS_MARCH_MINIMUM) +KBUILD_AFLAGS += $(CC_FLAGS_MARCH_MINIMUM) -D__DISABLE_EXPORTS +KBUILD_CFLAGS += $(CC_FLAGS_MARCH_MINIMUM) -D__DISABLE_EXPORTS CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char