s390/mm: add support for 2GB hugepages

[cascardo/linux.git] / arch / s390 / include / asm / hugetlb.h

diff --git a/arch/s390/include/asm/hugetlb.h b/arch/s390/include/asm/hugetlb.h
index d9be7c0..4c7fac7 100644 (file)
--- a/arch/s390/include/asm/hugetlb.h
+++ b/arch/s390/include/asm/hugetlb.h
@@ -41,7 +41,10 @@ static inline int prepare_hugepage_range(struct file *file,
 static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
                                  pte_t *ptep)
 {
-       pte_val(*ptep) = _SEGMENT_ENTRY_EMPTY;
+       if ((pte_val(*ptep) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3)
+               pte_val(*ptep) = _REGION3_ENTRY_EMPTY;
+       else
+               pte_val(*ptep) = _SEGMENT_ENTRY_EMPTY;
 }
 
 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,