From: Michael Ellerman Date: Mon, 28 Oct 2013 04:00:35 +0000 (+1100) Subject: powerpc: FA_DUMP depends on KEXEC X-Git-Tag: firefly_0821_release~176^2~4907^2~48 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=90890b1ef568a54547ef0490a7c15d7357b98bc9;p=firefly-linux-kernel-4.4.55.git powerpc: FA_DUMP depends on KEXEC If you try and build the FA_DUMP code with CONFIG_KEXEC=n, you see errors such as the following: arch/powerpc/kernel/fadump.c 408:2: error: 'crashing_cpu' undeclared (first use in this function) 410:2: error: implicit declaration of function 'crash_save_vmcoreinfo' 513:22: error: storage size of 'prstatus' isn't known 520:2: error: implicit declaration of function 'elf_core_copy_kernel_regs' 521:36: error: 'KEXEC_CORE_NOTE_NAME' undeclared (first use in this function) 624:49: error: 'note_buf_t' undeclared (first use in this function) 872:2: error: implicit declaration of function 'paddr_vmcoreinfo_note' 874:18: error: 'vmcoreinfo_max_size' undeclared (first use in this function) This is because although FA_DUMP doesn't use kexec as the actual reboot mechanism, it does use parts of the kexec code to assemble/disassemble the crash image. Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 5f15468300bf..de5c61d5db2c 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -407,7 +407,7 @@ config CRASH_DUMP config FA_DUMP bool "Firmware-assisted dump" - depends on PPC64 && PPC_RTAS && CRASH_DUMP + depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC help A robust mechanism to get reliable kernel crash dump with assistance from firmware. This approach does not use kexec,