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Use the mm semaphore to serialize multiple invocations of s390_enable_skey. The second CPU faulting on a storage key operation needs to wait for the completion of the page table update. Taking the mm semaphore writable has the positive side-effect that it prevents any host faults from taking place which does have implications on keys vs PGSTE. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> |
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| .. | ||
| cmm.c | ||
| dump_pagetables.c | ||
| extable.c | ||
| extmem.c | ||
| fault.c | ||
| gup.c | ||
| hugetlbpage.c | ||
| init.c | ||
| maccess.c | ||
| Makefile | ||
| mem_detect.c | ||
| mmap.c | ||
| page-states.c | ||
| pageattr.c | ||
| pgtable.c | ||
| vmem.c | ||