mm: verify the page links and memory model

[sfrench/cifs-2.6.git] / mm / internal.h

diff --git a/mm/internal.h b/mm/internal.h
index 5a9a6200e034fb43aad09efe34ac1b2e49825509..7a4a2885dc8e8179c3b446fbb994527c331ea2e4 100644 (file)
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -34,8 +34,7 @@ static inline void __put_page(struct page *page)
        atomic_dec(&page->_count);
 }
 
-extern void __init __free_pages_bootmem(struct page *page,
-                                               unsigned int order);
+extern void __free_pages_bootmem(struct page *page, unsigned int order);
 
 /*
  * function for dealing with page's order in buddy system.
@@ -47,4 +46,56 @@ static inline unsigned long page_order(struct page *page)
        VM_BUG_ON(!PageBuddy(page));
        return page_private(page);
 }
+
+/*
+ * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node,
+ * so all functions starting at paging_init should be marked __init
+ * in those cases. SPARSEMEM, however, allows for memory hotplug,
+ * and alloc_bootmem_node is not used.
+ */
+#ifdef CONFIG_SPARSEMEM
+#define __paginginit __meminit
+#else
+#define __paginginit __init
+#endif
+
+/* Memory initialisation debug and verification */
+enum mminit_level {
+       MMINIT_WARNING,
+       MMINIT_VERIFY,
+       MMINIT_TRACE
+};
+
+#ifdef CONFIG_DEBUG_MEMORY_INIT
+
+extern int mminit_loglevel;
+
+#define mminit_dprintk(level, prefix, fmt, arg...) \
+do { \
+       if (level < mminit_loglevel) { \
+               printk(level <= MMINIT_WARNING ? KERN_WARNING : KERN_DEBUG); \
+               printk(KERN_CONT "mminit::" prefix " " fmt, ##arg); \
+       } \
+} while (0)
+
+extern void mminit_verify_pageflags_layout(void);
+extern void mminit_verify_page_links(struct page *page,
+               enum zone_type zone, unsigned long nid, unsigned long pfn);
+
+#else
+
+static inline void mminit_dprintk(enum mminit_level level,
+                               const char *prefix, const char *fmt, ...)
+{
+}
+
+static inline void mminit_verify_pageflags_layout(void)
+{
+}
+
+static inline void mminit_verify_page_links(struct page *page,
+               enum zone_type zone, unsigned long nid, unsigned long pfn)
+{
+}
+#endif /* CONFIG_DEBUG_MEMORY_INIT */
 #endif