diff options
Diffstat (limited to 'include/asm-s390/tlb.h')
| -rw-r--r-- | include/asm-s390/tlb.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/asm-s390/tlb.h b/include/asm-s390/tlb.h index 9b2ddb7aac4..3d8a96d39d9 100644 --- a/include/asm-s390/tlb.h +++ b/include/asm-s390/tlb.h @@ -109,10 +109,15 @@ static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte) /* * pmd_free_tlb frees a pmd table and clears the CRSTE for the * segment table entry from the tlb. + * If the mm uses a two level page table the single pmd is freed + * as the pgd. pmd_free_tlb checks the asce_limit against 2GB + * to avoid the double free of the pmd in this case. */ static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd) { #ifdef __s390x__ + if (tlb->mm->context.asce_limit <= (1UL << 31)) + return; if (!tlb->fullmm) { tlb->array[--tlb->nr_pxds] = pmd; if (tlb->nr_ptes >= tlb->nr_pxds) @@ -125,10 +130,15 @@ static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd) /* * pud_free_tlb frees a pud table and clears the CRSTE for the * region third table entry from the tlb. + * If the mm uses a three level page table the single pud is freed + * as the pgd. pud_free_tlb checks the asce_limit against 4TB + * to avoid the double free of the pud in this case. */ static inline void pud_free_tlb(struct mmu_gather *tlb, pud_t *pud) { #ifdef __s390x__ + if (tlb->mm->context.asce_limit <= (1UL << 42)) + return; if (!tlb->fullmm) { tlb->array[--tlb->nr_pxds] = pud; if (tlb->nr_ptes >= tlb->nr_pxds) |