On Thu, Jul 03, 2014 at 07:55:06AM +0800, kbuild test robot wrote: > tree: git://git.cmpxchg.org/linux-mmotm.git master > head: 82b56f797fa200a5e9feac3a93cb6496909b9670 > commit: 025d75374c9c08274f60da5802381a8ef7490388 [289/396] kexec: load and relocate purgatory at kernel load time > config: make ARCH=s390 allnoconfig > > All error/warnings: > > kernel/built-in.o: In function `sys_kexec_file_load': > (.text+0x32314): undefined reference to `crypto_shash_final' > kernel/built-in.o: In function `sys_kexec_file_load': > (.text+0x32328): undefined reference to `crypto_shash_update' > kernel/built-in.o: In function `sys_kexec_file_load': > >> (.text+0x32338): undefined reference to `crypto_alloc_shash' > Hi, I think following patch should fix this issue. Thanks Vivek Subject: kexec: set CRYPTO=y and CRYPTO_SHA256=y for all arch supporting kexec Generic kexec implementation now makes use of crypto API to calculate the sha256 digest of loaded kernel segments (for new syscall kexec_file_load()). That means one need to enforce that CRYPTO and CRYPTO_SHA256 are built in for kexec to compile and for new syscall to work. I created this dependency for x86 but forgot to do for other arches supporting kexec. And ran into compilation failure reports from kbuild test robot. kernel/built-in.o: In function `sys_kexec_file_load': (.text+0x32314): undefined reference to `crypto_shash_final' kernel/built-in.o: In function `sys_kexec_file_load': (.text+0x32328): undefined reference to `crypto_shash_update' kernel/built-in.o: In function `sys_kexec_file_load': >> (.text+0x32338): undefined reference to `crypto_alloc_shash' Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx> --- arch/arm/Kconfig | 2 ++ arch/ia64/Kconfig | 2 ++ arch/m68k/Kconfig | 2 ++ arch/mips/Kconfig | 2 ++ arch/powerpc/Kconfig | 2 ++ arch/s390/Kconfig | 2 ++ arch/sh/Kconfig | 2 ++ arch/tile/Kconfig | 2 ++ 8 files changed, 16 insertions(+) Index: linux-2.6/arch/s390/Kconfig =================================================================== --- linux-2.6.orig/arch/s390/Kconfig 2014-07-03 09:32:29.866684834 -0400 +++ linux-2.6/arch/s390/Kconfig 2014-07-03 09:41:40.918646043 -0400 @@ -48,6 +48,8 @@ config ARCH_SUPPORTS_DEBUG_PAGEALLOC config KEXEC def_bool y + select CRYPTO + select CRYPTO_SHA256 config AUDIT_ARCH def_bool y Index: linux-2.6/arch/powerpc/Kconfig =================================================================== --- linux-2.6.orig/arch/powerpc/Kconfig 2014-07-03 09:32:29.866684834 -0400 +++ linux-2.6/arch/powerpc/Kconfig 2014-07-03 09:41:40.918646043 -0400 @@ -397,6 +397,8 @@ config PPC64_SUPPORTS_MEMORY_FAILURE config KEXEC bool "kexec system call" depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) + select CRYPTO + select CRYPTO_SHA256 help kexec is a system call that implements the ability to shutdown your current kernel, and to start another kernel. It is like a reboot Index: linux-2.6/arch/arm/Kconfig =================================================================== --- linux-2.6.orig/arch/arm/Kconfig 2014-07-03 09:32:29.866684834 -0400 +++ linux-2.6/arch/arm/Kconfig 2014-07-03 09:41:40.919646043 -0400 @@ -2050,6 +2050,8 @@ config XIP_PHYS_ADDR config KEXEC bool "Kexec system call (EXPERIMENTAL)" depends on (!SMP || PM_SLEEP_SMP) + select CRYPTO + select CRYPTO_SHA256 help kexec is a system call that implements the ability to shutdown your current kernel, and to start another kernel. It is like a reboot Index: linux-2.6/arch/m68k/Kconfig =================================================================== --- linux-2.6.orig/arch/m68k/Kconfig 2014-07-03 09:32:29.866684834 -0400 +++ linux-2.6/arch/m68k/Kconfig 2014-07-03 09:41:40.919646043 -0400 @@ -91,6 +91,8 @@ config MMU_SUN3 config KEXEC bool "kexec system call" depends on M68KCLASSIC + select CRYPTO + select CRYPTO_SHA256 help kexec is a system call that implements the ability to shutdown your current kernel, and to start another kernel. It is like a reboot Index: linux-2.6/arch/ia64/Kconfig =================================================================== --- linux-2.6.orig/arch/ia64/Kconfig 2014-06-24 15:56:04.045803541 -0400 +++ linux-2.6/arch/ia64/Kconfig 2014-07-03 09:51:00.615606643 -0400 @@ -547,6 +547,8 @@ source "drivers/sn/Kconfig" config KEXEC bool "kexec system call" depends on !IA64_HP_SIM && (!SMP || HOTPLUG_CPU) + select CRYPTO + select CRYPTO_SHA256 help kexec is a system call that implements the ability to shutdown your current kernel, and to start another kernel. It is like a reboot Index: linux-2.6/arch/mips/Kconfig =================================================================== --- linux-2.6.orig/arch/mips/Kconfig 2014-06-30 16:17:09.974221907 -0400 +++ linux-2.6/arch/mips/Kconfig 2014-07-03 09:54:49.371590540 -0400 @@ -2392,6 +2392,8 @@ source "kernel/Kconfig.preempt" config KEXEC bool "Kexec system call" + select CRYPTO + select CRYPTO_SHA256 help kexec is a system call that implements the ability to shutdown your current kernel, and to start another kernel. It is like a reboot Index: linux-2.6/arch/sh/Kconfig =================================================================== --- linux-2.6.orig/arch/sh/Kconfig 2014-06-24 15:56:04.906803481 -0400 +++ linux-2.6/arch/sh/Kconfig 2014-07-03 09:59:31.849570655 -0400 @@ -596,6 +596,8 @@ source kernel/Kconfig.hz config KEXEC bool "kexec system call (EXPERIMENTAL)" depends on SUPERH32 && MMU + select CRYPTO + select CRYPTO_SHA256 help kexec is a system call that implements the ability to shutdown your current kernel, and to start another kernel. It is like a reboot Index: linux-2.6/arch/tile/Kconfig =================================================================== --- linux-2.6.orig/arch/tile/Kconfig 2014-06-24 15:56:05.086803468 -0400 +++ linux-2.6/arch/tile/Kconfig 2014-07-03 10:02:45.223557043 -0400 @@ -192,6 +192,8 @@ source "kernel/Kconfig.hz" config KEXEC bool "kexec system call" + select CRYPTO + select CRYPTO_SHA256 ---help--- kexec is a system call that implements the ability to shutdown your current kernel, and to start another kernel. It is like a reboot -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>