arch/powerpc/mm/hugetlb: NestMMU workaround for hugetlb mprotect RW upgrade

[linux-2.6-block.git] / arch / powerpc / include / asm / book3s / 64 / hugetlb.h

diff --git a/arch/powerpc/include/asm/book3s/64/hugetlb.h b/arch/powerpc/include/asm/book3s/64/hugetlb.h
index 5b0177733994eaeb86572b81a8d378b0cd4f1879..66c1e4f88d654ebf18cadcfff1f906eeae048fce 100644 (file)
--- a/arch/powerpc/include/asm/book3s/64/hugetlb.h
+++ b/arch/powerpc/include/asm/book3s/64/hugetlb.h
@@ -13,6 +13,10 @@ radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
                                unsigned long len, unsigned long pgoff,
                                unsigned long flags);
 
+extern void radix__huge_ptep_modify_prot_commit(struct vm_area_struct *vma,
+                                               unsigned long addr, pte_t *ptep,
+                                               pte_t old_pte, pte_t pte);
+
 static inline int hstate_get_psize(struct hstate *hstate)
 {
        unsigned long shift;
@@ -42,4 +46,12 @@ static inline bool gigantic_page_supported(void)
 /* hugepd entry valid bit */
 #define HUGEPD_VAL_BITS                (0x8000000000000000UL)
 
+#define huge_ptep_modify_prot_start huge_ptep_modify_prot_start
+extern pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma,
+                                        unsigned long addr, pte_t *ptep);
+
+#define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit
+extern void huge_ptep_modify_prot_commit(struct vm_area_struct *vma,
+                                        unsigned long addr, pte_t *ptep,
+                                        pte_t old_pte, pte_t new_pte);
 #endif