diff options
Diffstat (limited to 'arch/s390/mm')
| -rw-r--r-- | arch/s390/mm/fault.c | 1 | ||||
| -rw-r--r-- | arch/s390/mm/mmap.c | 2 | ||||
| -rw-r--r-- | arch/s390/mm/pgtable.c | 19 |
3 files changed, 21 insertions, 1 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index bb5560eb2435..5845d3028ffc 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -12,6 +12,7 @@ #include <linux/perf_event.h> #include <linux/signal.h> #include <linux/sched.h> +#include <linux/sched/debug.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/string.h> diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c index 7ae1282d5be9..50618614881f 100644 --- a/arch/s390/mm/mmap.c +++ b/arch/s390/mm/mmap.c @@ -26,6 +26,8 @@ #include <linux/personality.h> #include <linux/mm.h> #include <linux/mman.h> +#include <linux/sched/signal.h> +#include <linux/sched/mm.h> #include <linux/random.h> #include <linux/compat.h> #include <linux/security.h> diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index b48dc5f1900b..463e5ef02304 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -608,12 +608,29 @@ void ptep_zap_key(struct mm_struct *mm, unsigned long addr, pte_t *ptep) bool test_and_clear_guest_dirty(struct mm_struct *mm, unsigned long addr) { spinlock_t *ptl; + pgd_t *pgd; + pud_t *pud; + pmd_t *pmd; pgste_t pgste; pte_t *ptep; pte_t pte; bool dirty; - ptep = get_locked_pte(mm, addr, &ptl); + pgd = pgd_offset(mm, addr); + pud = pud_alloc(mm, pgd, addr); + if (!pud) + return false; + pmd = pmd_alloc(mm, pud, addr); + if (!pmd) + return false; + /* We can't run guests backed by huge pages, but userspace can + * still set them up and then try to migrate them without any + * migration support. + */ + if (pmd_large(*pmd)) + return true; + + ptep = pte_alloc_map_lock(mm, pmd, addr, &ptl); if (unlikely(!ptep)) return false; |
