Martin Schwidefsky 443a813304 s390/kvm: simplify set_guest_storage_key ... Git commit ab3f285f22 "KVM: s390/mm: try a cow on read only pages for key ops" added a fixup_user_fault to set_guest_storage_key force a copy on write if the page is mapped read-only. This is supposed to fix the problem of differing storage keys for shared mappings, e.g. the empty_zero_page. But if the storage key is set before the pte is mapped the storage key update is done on the pgste. A later fault will happily map the shared page with the key from the pgste. Eventually git commit 2faee8ff9d "s390/mm: prevent and break zero page mappings in case of storage keys" fixed this problem for the empty_zero_page. The commit makes sure that guests enabled for storage keys will not use the empty_zero_page at all. As the call to fixup_user_fault in set_guest_storage_key depends on the order of the storage key operation vs. the fault that maps the pte it does not really fix anything. Just remove it. Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>		2016-03-02 06:44:22 -06:00
..
cmm.c	s390: convert use of typedef ctl_table to struct ctl_table	2013-10-28 08:36:25 +01:00
dump_pagetables.c	s390: remove 31 bit support	2015-03-25 11:49:33 +01:00
extable.c	s390: fix normalization bug in exception table sorting	2016-01-11 13:02:28 +01:00
extmem.c	s390/extmem: remove unused variable	2015-12-18 14:59:29 +01:00
fault.c	s390: remove all usages of PSW_ADDR_INSN	2016-01-19 12:14:03 +01:00
gup.c	s390, thp: remove infrastructure for handling splitting PMDs	2016-01-15 17:56:32 -08:00
hugetlbpage.c	s390/mm: implement soft-dirty bits for user memory change tracking	2015-10-14 14:32:05 +02:00
init.c	s390/irqflags: optimize irq restore	2016-01-19 12:14:01 +01:00
maccess.c	s390/maccess: reduce stnsm instructions	2016-02-17 09:05:04 +01:00
Makefile	s390/mem_detect: move memory detection code to mm folder	2013-05-02 15:50:22 +02:00
mem_detect.c	s390/mem_detect: use unsigned longs	2016-01-11 12:27:11 +01:00
mmap.c	s390/mm: use TASK_MAX_SIZE where applicable	2016-01-19 12:14:01 +01:00
page-states.c	s390/cmma: remove "cmma disable" code in case of dump again	2014-05-20 08:58:42 +02:00
pageattr.c	s390/pageattr: do a single TLB flush for change_page_attr	2016-02-23 08:56:17 +01:00
pgtable.c	s390/kvm: simplify set_guest_storage_key	2016-03-02 06:44:22 -06:00
vmem.c	s390: remove 31 bit support	2015-03-25 11:49:33 +01:00