kho: initialize kho_scratch pointer earlier in boot

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In a future patch, mm init will use kho_scratch_overlap() for deciding
the migrate type of pageblocks it initializes. The earliest user
currently is free_area_init(). kho_scratch_overlap()
relies on kho_scratch pointer being initialized. Introduce
kho_memory_init_early() to do this.

kho_populate() would normally be a good place to do this, but
unfortunately, phys_to_virt() does not work at that point on ARM64. So
we need yet another initialization function.

Signed-off-by: Pratyush Yadav (Google) <pratyush@kernel.org>
Link: https://patch.msgid.link/20260801084833.1897543-15-pratyush@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>

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This commit is contained in:

Pratyush Yadav (Google) 2026-08-01 10:48:23 +02:00 • committed by Mike Rapoport (Microsoft)

parent ec7c0b1a0d

commit 4513fea02a

3 changed files with 18 additions and 2 deletions

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3

include/linux/kexec_handover.h

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15

kernel/liveupdate/kexec_handover.c

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2

mm/mm_init.c

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