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-rw-r--r--block/blktrace.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/block/blktrace.c b/block/blktrace.c
index b2cbb4e5d76..20e11f354f1 100644
--- a/block/blktrace.c
+++ b/block/blktrace.c
@@ -75,6 +75,20 @@ static void trace_note_time(struct blk_trace *bt)
local_irq_restore(flags);
}
+void __trace_note_message(struct blk_trace *bt, const char *fmt, ...)
+{
+ int n;
+ va_list args;
+ static char bt_msg_buf[BLK_TN_MAX_MSG];
+
+ va_start(args, fmt);
+ n = vscnprintf(bt_msg_buf, BLK_TN_MAX_MSG, fmt, args);
+ va_end(args);
+
+ trace_note(bt, 0, BLK_TN_MESSAGE, bt_msg_buf, n);
+}
+EXPORT_SYMBOL_GPL(__trace_note_message);
+
static int act_log_check(struct blk_trace *bt, u32 what, sector_t sector,
pid_t pid)
{