fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / include / asm-x86_64 / pgalloc.h

diff --git a/include/asm-x86_64/pgalloc.h b/include/asm-x86_64/pgalloc.h
index 08cad24..21b7f3f 100644 (file)
--- a/include/asm-x86_64/pgalloc.h
+++ b/include/asm-x86_64/pgalloc.h
@@ -6,6 +6,13 @@
 #include <linux/threads.h>
 #include <linux/mm.h>
 
+#define arch_add_exec_range(mm, limit) \
+               do { (void)(mm), (void)(limit); } while (0)
+#define arch_flush_exec_range(mm) \
+               do { (void)(mm); } while (0)
+#define arch_remove_exec_range(mm, limit) \
+               do { (void)(mm), (void)(limit); } while (0)
+
 #define pmd_populate_kernel(mm, pmd, pte) \
                set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)))
 #define pud_populate(mm, pud, pmd) \
@@ -45,12 +52,39 @@ static inline void pud_free (pud_t *pud)
        free_page((unsigned long)pud);
 }
 
+static inline void pgd_list_add(pgd_t *pgd)
+{
+       struct page *page = virt_to_page(pgd);
+
+       spin_lock(&pgd_lock);
+       page->index = (pgoff_t)pgd_list;
+       if (pgd_list)
+               pgd_list->private = (unsigned long)&page->index;
+       pgd_list = page;
+       page->private = (unsigned long)&pgd_list;
+       spin_unlock(&pgd_lock);
+}
+
+static inline void pgd_list_del(pgd_t *pgd)
+{
+       struct page *next, **pprev, *page = virt_to_page(pgd);
+
+       spin_lock(&pgd_lock);
+       next = (struct page *)page->index;
+       pprev = (struct page **)page->private;
+       *pprev = next;
+       if (next)
+               next->private = (unsigned long)pprev;
+       spin_unlock(&pgd_lock);
+}
+
 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 {
        unsigned boundary;
        pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
        if (!pgd)
                return NULL;
+       pgd_list_add(pgd);
        /*
         * Copy kernel pointers in from init.
         * Could keep a freelist or slab cache of those because the kernel
@@ -67,6 +101,7 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 static inline void pgd_free(pgd_t *pgd)
 {
        BUG_ON((unsigned long)pgd & (PAGE_SIZE-1));
+       pgd_list_del(pgd);
        free_page((unsigned long)pgd);
 }