#include <linux/bit_spinlock.h>
#include <linux/shrinker.h>
#include <linux/resource.h>
+#include <linux/page_ext.h>
struct mempolicy;
struct anon_vma;
*/
struct mempolicy *(*get_policy)(struct vm_area_struct *vma,
unsigned long addr);
- int (*migrate)(struct vm_area_struct *vma, const nodemask_t *from,
- const nodemask_t *to, unsigned long flags);
#endif
/* called by sys_remap_file_pages() to populate non-linear mapping */
int (*remap_pages)(struct vm_area_struct *vma, unsigned long addr,
#if VM_GROWSUP
extern int expand_upwards(struct vm_area_struct *vma, unsigned long address);
#else
- #define expand_upwards(vma, address) do { } while (0)
+ #define expand_upwards(vma, address) (0)
#endif
/* Look up the first VMA which satisfies addr < vm_end, NULL if none. */
#endif /* CONFIG_PROC_FS */
#ifdef CONFIG_DEBUG_PAGEALLOC
-extern void kernel_map_pages(struct page *page, int numpages, int enable);
+extern bool _debug_pagealloc_enabled;
+extern void __kernel_map_pages(struct page *page, int numpages, int enable);
+
+static inline bool debug_pagealloc_enabled(void)
+{
+ return _debug_pagealloc_enabled;
+}
+
+static inline void
+kernel_map_pages(struct page *page, int numpages, int enable)
+{
+ if (!debug_pagealloc_enabled())
+ return;
+
+ __kernel_map_pages(page, numpages, enable);
+}
#ifdef CONFIG_HIBERNATION
extern bool kernel_page_present(struct page *page);
#endif /* CONFIG_HIBERNATION */
void __user *, size_t *, loff_t *);
#endif
-unsigned long shrink_slab(struct shrink_control *shrink,
- unsigned long nr_pages_scanned,
- unsigned long lru_pages);
+unsigned long shrink_node_slabs(gfp_t gfp_mask, int nid,
+ unsigned long nr_scanned,
+ unsigned long nr_eligible);
#ifndef CONFIG_MMU
#define randomize_va_space 0
unsigned int pages_per_huge_page);
#endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_HUGETLBFS */
+extern struct page_ext_operations debug_guardpage_ops;
+extern struct page_ext_operations page_poisoning_ops;
+
#ifdef CONFIG_DEBUG_PAGEALLOC
extern unsigned int _debug_guardpage_minorder;
+extern bool _debug_guardpage_enabled;
static inline unsigned int debug_guardpage_minorder(void)
{
return _debug_guardpage_minorder;
}
+static inline bool debug_guardpage_enabled(void)
+{
+ return _debug_guardpage_enabled;
+}
+
static inline bool page_is_guard(struct page *page)
{
- return test_bit(PAGE_DEBUG_FLAG_GUARD, &page->debug_flags);
+ struct page_ext *page_ext;
+
+ if (!debug_guardpage_enabled())
+ return false;
+
+ page_ext = lookup_page_ext(page);
+ return test_bit(PAGE_EXT_DEBUG_GUARD, &page_ext->flags);
}
#else
static inline unsigned int debug_guardpage_minorder(void) { return 0; }
+static inline bool debug_guardpage_enabled(void) { return false; }
static inline bool page_is_guard(struct page *page) { return false; }
#endif /* CONFIG_DEBUG_PAGEALLOC */