tree b8b9ad4c00279d8fc0f0402704fc580b1cbc092c
parent d9ae6772d3a3d7325d535577d9fd09c0de8a9da3
author Carsten Otte <cotte@de.ibm.com> 1322742736 +0100
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1322742737 +0100

[S390] fix page change underindication in pgste_update_all

This patch makes sure we don't underindicate _PAGE_CHANGED in case
we have a race between an operation that changes the page and this
code path that hits us between page_get_storage_key and
page_set_storage_key. Note that we still have a potential
underindication on _PAGE_REFERENCED in the unlikely event that
the page was changed but not referenced _and_ someone references
the page in the race window. That's not considered to be a problem.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>