x86: expose number of page table levels on Kconfig level

We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 7 deletions

diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 5a7e5252c878..b28edfecbdfe 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -58,7 +58,7 @@ void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
         tlb_remove_page(tlb, pte);
 }
 
-#if PAGETABLE_LEVELS > 2
+#if CONFIG_PGTABLE_LEVELS > 2
 void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
 {
         struct page *page = virt_to_page(pmd);
@@ -74,14 +74,14 @@ void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)
         tlb_remove_page(tlb, page);
 }
 
-#if PAGETABLE_LEVELS > 3
+#if CONFIG_PGTABLE_LEVELS > 3
 void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud)
 {
         paravirt_release_pud(__pa(pud) >> PAGE_SHIFT);
         tlb_remove_page(tlb, virt_to_page(pud));
 }
-#endif  /* PAGETABLE_LEVELS > 3 */
-#endif  /* PAGETABLE_LEVELS > 2 */
+#endif  /* CONFIG_PGTABLE_LEVELS > 3 */
+#endif  /* CONFIG_PGTABLE_LEVELS > 2 */
 
 static inline void pgd_list_add(pgd_t *pgd)
 {
@@ -117,9 +117,9 @@ static void pgd_ctor(struct mm_struct *mm, pgd_t *pgd)
         /* If the pgd points to a shared pagetable level (either the
            ptes in non-PAE, or shared PMD in PAE), then just copy the
            references from swapper_pg_dir. */
-        if (PAGETABLE_LEVELS == 2 ||
-            (PAGETABLE_LEVELS == 3 && SHARED_KERNEL_PMD) ||
-            PAGETABLE_LEVELS == 4) {
+        if (CONFIG_PGTABLE_LEVELS == 2 ||
+            (CONFIG_PGTABLE_LEVELS == 3 && SHARED_KERNEL_PMD) ||
+            CONFIG_PGTABLE_LEVELS == 4) {
                 clone_pgd_range(pgd + KERNEL_PGD_BOUNDARY,
                                 swapper_pg_dir + KERNEL_PGD_BOUNDARY,
                                 KERNEL_PGD_PTRS);