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| author | AKASHI Takahiro <takahiro.akashi@linaro.org> | 2018-11-15 14:52:44 +0900 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2018-12-06 14:38:50 +0000 |
| commit | 497e1858647a0b859076dc96300527375977d76a (patch) | |
| tree | 6d4862bac0465c42164091c7ba13c5f91668b3ec /kernel/kexec_file.c | |
| parent | 735c2f90e333b3d0adee52a8e7e855a0c0eca284 (diff) | |
| download | lwn-497e1858647a0b859076dc96300527375977d76a.tar.gz lwn-497e1858647a0b859076dc96300527375977d76a.zip | |
kexec_file: kexec_walk_memblock() only walks a dedicated region at kdump
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>
Diffstat (limited to 'kernel/kexec_file.c')
| -rw-r--r-- | kernel/kexec_file.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index d03195a8cb6e..f1d0e00a3971 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -515,8 +515,11 @@ static int kexec_walk_memblock(struct kexec_buf *kbuf, phys_addr_t mstart, mend; struct resource res = { }; + if (kbuf->image->type == KEXEC_TYPE_CRASH) + return func(&crashk_res, kbuf); + 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) { /* * In memblock, end points to the first byte after the @@ -530,8 +533,8 @@ static int kexec_walk_memblock(struct kexec_buf *kbuf, break; } } else { - for_each_free_mem_range(i, NUMA_NO_NODE, 0, &mstart, &mend, - NULL) { + for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, + &mstart, &mend, NULL) { /* * In memblock, end points to the first byte after the * range while in kexec, end points to the last byte |