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 <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
90890b1ef5