x86: move pte functions into common asm/pgalloc.h

Common definitions for 2-level pagetable functions.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 16 insertions, 0 deletions

diff --git a/include/asm-x86/pgalloc.h b/include/asm-x86/pgalloc.h
index 28773594f741..0d15e21eefec 100644
--- a/include/asm-x86/pgalloc.h
+++ b/include/asm-x86/pgalloc.h
@@ -24,6 +24,22 @@ extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
 extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
 
+/* Should really implement gc for free page table pages. This could be
+   done with a reference count in struct page. */
+
+static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+        BUG_ON((unsigned long)pte & (PAGE_SIZE-1));
+        free_page((unsigned long)pte);
+}
+
+static inline void pte_free(struct mm_struct *mm, struct page *pte)
+{
+        __free_page(pte);
+}
+
+extern void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte);
+
 #ifdef CONFIG_X86_32
 # include "pgalloc_32.h"
 #else