[PATCH] vmcore: convert mmap_vmcore_fault() to use folios

[sashiko-bot at kernel.org]

> 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.
> 
> Signed-off-by: Tal Zussman <tz2294 at columbia.edu>

Sashiko has reviewed this patch and found no issues. It looks great!

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Sashiko AI review · https://sashiko.dev/#/patchset/20260915-vmcore-fault-folio-v1-1-a0cb6278670f@columbia.edu?part=1