s390/mm: Fix storage key clearing for guest huge pages

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[ Upstream commit 843c328068 ]

The function __storage_key_init_range() expects the end address to be
the first byte outside the range to be initialized. I.e. end - start
should be the size of the area to be initialized.

The current code works because __storage_key_init_range() will still loop
over every page in the range, but it is slower than using sske_frame().

Fixes: 964c2c05c9 ("s390/mm: Clear huge page storage keys on enable_skey")
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Link: https://lore.kernel.org/r/20240416114220.28489-2-imbrenda@linux.ibm.com
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Claudio Imbrenda 2024-04-16 13:42:19 +02:00 • committed by Greg Kroah-Hartman

parent 67a8dbe10b

commit 5dbc158805

1 changed files with 1 additions and 1 deletions

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arch/s390/mm/gmap.c

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