diff options
author | Alex Shi <alex.shi@linaro.org> | 2017-05-31 12:02:46 +0800 |
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committer | Alex Shi <alex.shi@linaro.org> | 2017-05-31 12:02:46 +0800 |
commit | dc06d1ba220ca16ebbca598bb45242ec5e818cb2 (patch) | |
tree | ef66bd14901ec3a07cf65842a3b63884a64be529 /arch/s390/mm/pgtable.c | |
parent | 018ed21cf3b7cb618c63294793d63b23ce4afe24 (diff) | |
parent | a898540914d4136f29bc738ce593c1c501006f23 (diff) |
Merge branch 'linux-linaro-lsk-v4.1' into linux-linaro-lsk-v4.1-androidlsk-v4.1-17.06-androidlsk-v4.1-17.05-android
Diffstat (limited to 'arch/s390/mm/pgtable.c')
-rw-r--r-- | arch/s390/mm/pgtable.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index 9ac703cfdb21..17c13c9287af 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -1284,11 +1284,28 @@ EXPORT_SYMBOL_GPL(s390_reset_cmma); */ bool gmap_test_and_clear_dirty(unsigned long address, struct gmap *gmap) { + pgd_t *pgd; + pud_t *pud; + pmd_t *pmd; pte_t *pte; spinlock_t *ptl; bool dirty = false; - pte = get_locked_pte(gmap->mm, address, &ptl); + pgd = pgd_offset(gmap->mm, address); + pud = pud_alloc(gmap->mm, pgd, address); + if (!pud) + return false; + pmd = pmd_alloc(gmap->mm, pud, address); + 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; + + pte = pte_alloc_map_lock(gmap->mm, pmd, address, &ptl); if (unlikely(!pte)) return false; |