net: Avoid extra wakeups of threads blocked in wait_for_packet()

[safe/jmp/linux-2.6] / include / linux / memory.h

diff --git a/include/linux/memory.h b/include/linux/memory.h
index f80e0e3..37fa19b 100644 (file)
--- a/include/linux/memory.h
+++ b/include/linux/memory.h
@@ -53,6 +53,13 @@ struct memory_notify {
 struct notifier_block;
 struct mem_section;
 
+/*
+ * Priorities for the hotplug memory callback routines (stored in decreasing
+ * order in the callback chain)
+ */
+#define SLAB_CALLBACK_PRI       1
+#define IPC_CALLBACK_PRI        10
+
 #ifndef CONFIG_MEMORY_HOTPLUG_SPARSE
 static inline int memory_dev_init(void)
 {
@@ -72,19 +79,19 @@ static inline int memory_notify(unsigned long val, void *v)
 #else
 extern int register_memory_notifier(struct notifier_block *nb);
 extern void unregister_memory_notifier(struct notifier_block *nb);
-extern int register_new_memory(struct mem_section *);
+extern int register_new_memory(int, struct mem_section *);
 extern int unregister_memory_section(struct mem_section *);
 extern int memory_dev_init(void);
 extern int remove_memory_block(unsigned long, struct mem_section *, int);
 extern int memory_notify(unsigned long val, void *v);
+extern struct memory_block *find_memory_block(struct mem_section *);
 #define CONFIG_MEM_BLOCK_SIZE  (PAGES_PER_SECTION<<PAGE_SHIFT)
-
-
+enum mem_add_context { BOOT, HOTPLUG };
 #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */
 
 #ifdef CONFIG_MEMORY_HOTPLUG
 #define hotplug_memory_notifier(fn, pri) {                     \
-       static struct notifier_block fn##_mem_nb =              \
+       static __meminitdata struct notifier_block fn##_mem_nb =\
                { .notifier_call = fn, .priority = pri };       \
        register_memory_notifier(&fn##_mem_nb);                 \
 }
@@ -92,4 +99,21 @@ extern int memory_notify(unsigned long val, void *v);
 #define hotplug_memory_notifier(fn, pri) do { } while (0)
 #endif
 
+/*
+ * 'struct memory_accessor' is a generic interface to provide
+ * in-kernel access to persistent memory such as i2c or SPI EEPROMs
+ */
+struct memory_accessor {
+       ssize_t (*read)(struct memory_accessor *, char *buf, off_t offset,
+                       size_t count);
+       ssize_t (*write)(struct memory_accessor *, const char *buf,
+                        off_t offset, size_t count);
+};
+
+/*
+ * Kernel text modification mutex, used for code patching. Users of this lock
+ * can sleep.
+ */
+extern struct mutex text_mutex;
+
 #endif /* _LINUX_MEMORY_H_ */