vmcore: convert mmap_vmcore_fault() to use folios

Use a folio for the page cache page the s390 fault handler reads the old
kernel's memory into.  This removes four compound_head() calls and one of
the last callers of find_or_create_page().

The vmcore mapping only has order-0 folios, so the logic is unchanged.

Compile tested for s390.

Link: https://lore.kernel.org/20260915-vmcore-fault-folio-v1-1-a0cb6278670f@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Pratyush Yadav <pratyush@kernel.org>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Dave Young <ruirui.yang@linux.dev>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>

0 files changed, 0 insertions, 0 deletions