powerpc, kexec_file: factor out memblock-based arch_kexec_walk_mem()
authorAKASHI Takahiro <takahiro.akashi@linaro.org>
Thu, 15 Nov 2018 05:52:43 +0000 (14:52 +0900)
committerWill Deacon <will.deacon@arm.com>
Thu, 6 Dec 2018 14:38:50 +0000 (14:38 +0000)
commit735c2f90e333b3d0adee52a8e7e855a0c0eca284
treee665fc78903edfe09b27ad0eb356a5aef6051740
parentb6664ba42f1424d2768b605dd60cecc4428d9364
powerpc, kexec_file: factor out memblock-based arch_kexec_walk_mem()

Memblock list is another source for usable system memory layout.
So move powerpc's arch_kexec_walk_mem() to common code so that other
memblock-based architectures, particularly arm64, can also utilise it.
A moved function is now renamed to kexec_walk_memblock() and integrated
into kexec_locate_mem_hole(), which will now be usable for all
architectures with no need for overriding arch_kexec_walk_mem().

With this change, arch_kexec_walk_mem() need no longer be a weak function,
and was now renamed to kexec_walk_resources().

Since powerpc doesn't support kdump in its kexec_file_load(), the current
kexec_walk_memblock() won't work for kdump either in this form, this will
be fixed in the next patch.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Dave Young <dyoung@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Acked-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/powerpc/kernel/machine_kexec_file_64.c
include/linux/kexec.h
kernel/kexec_file.c