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-rw-r--r--include/linux/memory.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/memory.h b/include/linux/memory.h
index 3fdc10806d3..37fa19b34ef 100644
--- a/include/linux/memory.h
+++ b/include/linux/memory.h
@@ -99,4 +99,21 @@ enum mem_add_context { BOOT, HOTPLUG };
#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_ */