BUG_ON() Conversion in drivers/s390/net/lcs.c

[safe/jmp/linux-2.6] / mm / memory.c

diff --git a/mm/memory.c b/mm/memory.c
index 71bc664..0ec7bc6 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -87,7 +87,7 @@ int randomize_va_space __read_mostly = 1;
 static int __init disable_randmaps(char *s)
 {
        randomize_va_space = 0;
-       return 0;
+       return 1;
 }
 __setup("norandmaps", disable_randmaps);
 
@@ -277,7 +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 {
@@ -285,8 +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);
@@ -396,12 +395,16 @@ struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr, pte_
                        return NULL;
        }
 
-#ifdef CONFIG_DEBUG_VM
+       /*
+        * Add some anal sanity checks for now. Eventually,
+        * 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.
+        */
        if (unlikely(!pfn_valid(pfn))) {
                print_bad_pte(vma, pte, addr);
                return NULL;
        }
-#endif
 
        /*
         * NOTE! We still have PageReserved() pages in the page 
@@ -1068,6 +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)
@@ -2349,10 +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);