The select of KEXEC for CRASH_DUMP in kernel/Kconfig.kexec will be dropped, then compiling errors will be triggered if below config items are set: === CONFIG_CRASH_CORE=y CONFIG_KEXEC_CORE=y CONFIG_CRASH_DUMP=y === E.g on mips, below link error are seen: -------------------------------------------------------------------- mipsel-linux-ld: kernel/kexec_core.o: in function `kimage_free': kernel/kexec_core.c:(.text+0x2200): undefined reference to `machine_kexec_cleanup' mipsel-linux-ld: kernel/kexec_core.o: in function `__crash_kexec': kernel/kexec_core.c:(.text+0x2480): undefined reference to `machine_crash_shutdown' mipsel-linux-ld: kernel/kexec_core.c:(.text+0x2488): undefined reference to `machine_kexec' mipsel-linux-ld: kernel/kexec_core.o: in function `kernel_kexec': kernel/kexec_core.c:(.text+0x29b8): undefined reference to `machine_shutdown' mipsel-linux-ld: kernel/kexec_core.c:(.text+0x29c0): undefined reference to `machine_kexec' -------------------------------------------------------------------- Here, change the incorrect dependency of building kexec_core related object files, and the ifdeffery on architectures from CONFIG_KEXEC to CONFIG_KEXEC_CORE. Testing: ======== Passed on mips and loognarch with the LKP reproducer. Baoquan He (5): loongarch, kexec: change dependency of object files m68k, kexec: fix the incorrect ifdeffery and build dependency of CONFIG_KEXEC mips, kexec: fix the incorrect ifdeffery and dependency of CONFIG_KEXEC sh, kexec: fix the incorrect ifdeffery and dependency of CONFIG_KEXEC x86, kexec: fix the wrong ifdeffery CONFIG_KEXEC arch/loongarch/kernel/Makefile | 2 +- arch/m68k/include/asm/kexec.h | 4 ++-- arch/m68k/kernel/Makefile | 2 +- arch/mips/cavium-octeon/smp.c | 4 ++-- arch/mips/include/asm/kexec.h | 2 +- arch/mips/include/asm/smp-ops.h | 2 +- arch/mips/include/asm/smp.h | 2 +- arch/mips/kernel/Makefile | 2 +- arch/mips/kernel/smp-bmips.c | 4 ++-- arch/mips/kernel/smp-cps.c | 10 +++++----- arch/mips/loongson64/reset.c | 4 ++-- arch/mips/loongson64/smp.c | 2 +- arch/sh/include/asm/kexec.h | 4 ++-- arch/sh/kernel/Makefile | 2 +- arch/sh/kernel/reboot.c | 4 ++-- arch/sh/kernel/setup.c | 2 +- arch/x86/boot/compressed/acpi.c | 2 +- 17 files changed, 27 insertions(+), 27 deletions(-) -- 2.41.0