blktrace: add trace/ to /sys/block/sda

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

diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index 267edc4..62763c9 100644 (file)
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -198,6 +198,7 @@ extern int blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
                           char __user *arg);
 extern int blk_trace_startstop(struct request_queue *q, int start);
 extern int blk_trace_remove(struct request_queue *q);
+extern int blk_trace_init_sysfs(struct device *dev);
 
 extern struct attribute_group blk_trace_attr_group;
 
@@ -210,6 +211,11 @@ extern struct attribute_group blk_trace_attr_group;
 # define blk_trace_startstop(q, start)                 (-ENOTTY)
 # define blk_trace_remove(q)                           (-ENOTTY)
 # define blk_add_trace_msg(q, fmt, ...)                        do { } while (0)
+static inline int blk_trace_init_sysfs(struct device *dev)
+{
+       return 0;
+}
+
 #endif /* CONFIG_BLK_DEV_IO_TRACE */
 
 #endif /* __KERNEL__ */