Merge tag 'xfs-for-linus-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6-block.git] / include / linux / blktrace_api.h

diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index afc1343df3c7ab3775c8fc2e822c4e619bf658c1..0f3172b8b22597309cacf6aa8567786996ce7aa5 100644 (file)
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -57,6 +57,14 @@ void __trace_note_message(struct blk_trace *, const char *fmt, ...);
        } while (0)
 #define BLK_TN_MAX_MSG         128
 
+static inline bool blk_trace_note_message_enabled(struct request_queue *q)
+{
+       struct blk_trace *bt = q->blk_trace;
+       if (likely(!bt))
+               return false;
+       return bt->act_mask & BLK_TC_NOTIFY;
+}
+
 extern void blk_add_driver_data(struct request_queue *q, struct request *rq,
                                void *data, size_t len);
 extern int blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
@@ -79,6 +87,7 @@ extern struct attribute_group blk_trace_attr_group;
 # define blk_trace_remove(q)                           (-ENOTTY)
 # define blk_add_trace_msg(q, fmt, ...)                        do { } while (0)
 # define blk_trace_remove_sysfs(dev)                   do { } while (0)
+# define blk_trace_note_message_enabled(q)             (false)
 static inline int blk_trace_init_sysfs(struct device *dev)
 {
        return 0;