powerpc/radix: Fix kernel crash with mremap()

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

diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index 2e6ada28da645fd6a122d153fedfdc2c62b7843e..c9bfe526ca9df86c0f5b2aab8cbf063cd32ed81b 100644 (file)
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -1258,21 +1258,13 @@ extern pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
 
 #define pmd_move_must_withdraw pmd_move_must_withdraw
 struct spinlock;
-static inline int pmd_move_must_withdraw(struct spinlock *new_pmd_ptl,
-                                        struct spinlock *old_pmd_ptl,
-                                        struct vm_area_struct *vma)
-{
-       if (radix_enabled())
-               return false;
-       /*
-        * Archs like ppc64 use pgtable to store per pmd
-        * specific information. So when we switch the pmd,
-        * we should also withdraw and deposit the pgtable
-        */
-       return true;
-}
-
-
+extern int pmd_move_must_withdraw(struct spinlock *new_pmd_ptl,
+                                 struct spinlock *old_pmd_ptl,
+                                 struct vm_area_struct *vma);
+/*
+ * Hash translation mode use the deposited table to store hash pte
+ * slot information.
+ */
 #define arch_needs_pgtable_deposit arch_needs_pgtable_deposit
 static inline bool arch_needs_pgtable_deposit(void)
 {