[PATCH] setup_per_zone_pages_min() overflow fix

[mv-sheeva.git] / mm / rmap.c

diff --git a/mm/rmap.c b/mm/rmap.c
index 134aef9d66c5e9a2958a5bc6e49670751faade49..1963e269314dcabae535545b978f7a544b7e96e5 100644 (file)
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -56,13 +56,11 @@
 
 #include <asm/tlbflush.h>
 
-//#define RMAP_DEBUG /* can be enabled only for debugging */
-
 struct kmem_cache *anon_vma_cachep;
 
 static inline void validate_anon_vma(struct vm_area_struct *find_vma)
 {
-#ifdef RMAP_DEBUG
+#ifdef CONFIG_DEBUG_VM
        struct anon_vma *anon_vma = find_vma->anon_vma;
        struct vm_area_struct *vma;
        unsigned int mapcount = 0;
@@ -551,13 +549,14 @@ void page_add_file_rmap(struct page *page)
 void page_remove_rmap(struct page *page)
 {
        if (atomic_add_negative(-1, &page->_mapcount)) {
-               if (page_mapcount(page) < 0) {
+#ifdef CONFIG_DEBUG_VM
+               if (unlikely(page_mapcount(page) < 0)) {
                        printk (KERN_EMERG "Eeek! page_mapcount(page) went negative! (%d)\n", page_mapcount(page));
                        printk (KERN_EMERG "  page->flags = %lx\n", page->flags);
                        printk (KERN_EMERG "  page->count = %x\n", page_count(page));
                        printk (KERN_EMERG "  page->mapping = %p\n", page->mapping);
                }
-
+#endif
                BUG_ON(page_mapcount(page) < 0);
                /*
                 * It would be tidy to reset the PageAnon mapping here,