s390/mm: Map empty zero pages read-only

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On arm64 the empty zero page is going to be mapped read-only [1].
Do the same for s390 with an explicit set_memory_ro() call.

[1] https://lore.kernel.org/all/20260427153416.2103979-19-ardb+git@google.com/

Suggested-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

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Heiko Carstens 2026-05-11 12:52:39 +02:00 • committed by Alexander Gordeev

parent a2cec68637

commit 29f23176e7

1 changed files with 2 additions and 0 deletions

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arch/s390/mm/init.c

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