7b71205ae1
When contiguous ranges of order-0 pages are restored, kho_restore_page()
calls prep_compound_page() with the first page in the range and order as
parameters and then kho_restore_pages() calls split_page() to make sure
all pages in the range are order-0.
However, since split_page() is not intended to split compound pages and
with VM_DEBUG enabled it will trigger a VM_BUG_ON_PAGE().
Update kho_restore_page() so that it will use prep_compound_page() when it
restores a folio and make sure it properly sets page count for both large
folios and ranges of order-0 pages.
Link: https://lkml.kernel.org/r/20251125110917.843744-3-rppt@kernel.org
Fixes:
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|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| kexec_handover.c | ||
| kexec_handover_debug.c | ||
| kexec_handover_debugfs.c | ||
| kexec_handover_internal.h | ||
| luo_core.c | ||
| luo_file.c | ||
| luo_internal.h | ||
| luo_session.c | ||