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kexec_file: kexec_walk_memblock() only walks a dedicated region at kdump

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In kdump case, there exists only one dedicated memblock region as usable
memory (crashk_res). With this patch, kexec_walk_memblock() runs a given
callback function on this region.

Cosmetic change: 0 to MEMBLOCK_NONE at for_each_free_mem_range*()

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Acked-by: Dave Young <dyoung@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
AKASHI Takahiro 2018-11-15 14:52:44 +09:00 • committed by Will Deacon
parent 735c2f90e3
commit 497e185864
1 changed files with 6 additions and 3 deletions
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9
kernel/kexec_file.c
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@ -515,8 +515,11 @@ static int kexec_walk_memblock(struct kexec_buf *kbuf,
phys_addr_t mstart, mend; phys_addr_t mstart, mend;
struct resource res = { }; struct resource res = { };
if (kbuf->image->type == KEXEC_TYPE_CRASH)
return func(&crashk_res, kbuf);
if (kbuf->top_down) { if (kbuf->top_down) {
for_each_free_mem_range_reverse(i, NUMA_NO_NODE, 0, for_each_free_mem_range_reverse(i, NUMA_NO_NODE, MEMBLOCK_NONE,
&mstart, &mend, NULL) { &mstart, &mend, NULL) {
/* /*
* In memblock, end points to the first byte after the * In memblock, end points to the first byte after the
@ -530,8 +533,8 @@ static int kexec_walk_memblock(struct kexec_buf *kbuf,
break; break;
} }
} else { } else {
for_each_free_mem_range(i, NUMA_NO_NODE, 0, &mstart, &mend, for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE,
NULL) { &mstart, &mend, NULL) {
/* /*
* In memblock, end points to the first byte after the * In memblock, end points to the first byte after the
* range while in kexec, end points to the last byte * range while in kexec, end points to the last byte