[PATCH] autofs4: follow_link missing functionality

[linux-2.6-omap-h63xx.git] / mm / memory.c

diff --git a/mm/memory.c b/mm/memory.c
index 2bee1f21aa8aa92294ef481778b3c370063413fb..8d8f52569f328ab35d6ac9e68abe94c348434062 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -82,6 +82,16 @@ EXPORT_SYMBOL(num_physpages);
 EXPORT_SYMBOL(high_memory);
 EXPORT_SYMBOL(vmalloc_earlyreserve);
 
+int randomize_va_space __read_mostly = 1;
+
+static int __init disable_randmaps(char *s)
+{
+       randomize_va_space = 0;
+       return 0;
+}
+__setup("norandmaps", disable_randmaps);
+
+
 /*
  * If a p?d_bad entry is found while walking page tables, report
  * the error, before resetting entry to p?d_none.  Usually (but
@@ -267,7 +277,7 @@ void free_pgtables(struct mmu_gather **tlb, struct vm_area_struct *vma,
                anon_vma_unlink(vma);
                unlink_file_vma(vma);
 
-               if (is_hugepage_only_range(vma->vm_mm, addr, HPAGE_SIZE)) {
+               if (is_vm_hugetlb_page(vma)) {
                        hugetlb_free_pgd_range(tlb, addr, vma->vm_end,
                                floor, next? next->vm_start: ceiling);
                } else {
@@ -275,8 +285,7 @@ void free_pgtables(struct mmu_gather **tlb, struct vm_area_struct *vma,
                         * Optimization: gather nearby vmas into one call down
                         */
                        while (next && next->vm_start <= vma->vm_end + PMD_SIZE
-                         && !is_hugepage_only_range(vma->vm_mm, next->vm_start,
-                                                       HPAGE_SIZE)) {
+                              && !is_vm_hugetlb_page(next)) {
                                vma = next;
                                next = vma->vm_next;
                                anon_vma_unlink(vma);
@@ -378,7 +387,7 @@ struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr, pte_
 {
        unsigned long pfn = pte_pfn(pte);
 
-       if (vma->vm_flags & VM_PFNMAP) {
+       if (unlikely(vma->vm_flags & VM_PFNMAP)) {
                unsigned long off = (addr - vma->vm_start) >> PAGE_SHIFT;
                if (pfn == vma->vm_pgoff + off)
                        return NULL;
@@ -391,8 +400,6 @@ struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr, pte_
         * we should just do "return pfn_to_page(pfn)", but
         * in the meantime we check that we get a valid pfn,
         * and that the resulting page looks ok.
-        *
-        * Remove this test eventually!
         */
        if (unlikely(!pfn_valid(pfn))) {
                print_bad_pte(vma, pte, addr);
@@ -613,11 +620,12 @@ static unsigned long zap_pte_range(struct mmu_gather *tlb,
                        (*zap_work)--;
                        continue;
                }
+
+               (*zap_work) -= PAGE_SIZE;
+
                if (pte_present(ptent)) {
                        struct page *page;
 
-                       (*zap_work) -= PAGE_SIZE;
-
                        page = vm_normal_page(vma, addr, ptent);
                        if (unlikely(details) && page) {
                                /*
@@ -1063,6 +1071,8 @@ int get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
                        }
                        if (pages) {
                                pages[i] = page;
+
+                               flush_anon_page(page, start);
                                flush_dcache_page(page);
                        }
                        if (vmas)
@@ -1210,9 +1220,7 @@ out:
  * The page has to be a nice clean _individual_ kernel allocation.
  * If you allocate a compound page, you need to have marked it as
  * such (__GFP_COMP), or manually just split the page up yourself
- * (which is mainly an issue of doing "set_page_count(page, 1)" for
- * each sub-page, and then freeing them one by one when you free
- * them rather than freeing it as a compound page).
+ * (see split_page()).
  *
  * NOTE! Traditionally this was done with "remap_pfn_range()" which
  * took an arbitrary page protection parameter. This doesn't allow
@@ -2346,10 +2354,8 @@ int make_pages_present(unsigned long addr, unsigned long end)
        if (!vma)
                return -1;
        write = (vma->vm_flags & VM_WRITE) != 0;
-       if (addr >= end)
-               BUG();
-       if (end > vma->vm_end)
-               BUG();
+       BUG_ON(addr >= end);
+       BUG_ON(end > vma->vm_end);
        len = (end+PAGE_SIZE-1)/PAGE_SIZE-addr/PAGE_SIZE;
        ret = get_user_pages(current, current->mm, addr,
                        len, write, 0, NULL, NULL);