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-rw-r--r--include/linux/jbd2.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index cc02393bfce..d97eb652d6c 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -1315,6 +1315,12 @@ extern int jbd_blocks_per_page(struct inode *inode);
#define BUFFER_TRACE2(bh, bh2, info) do {} while (0)
#define JBUFFER_TRACE(jh, info) do {} while (0)
+/*
+ * jbd2_dev_to_name is a utility function used by the jbd2 and ext4
+ * tracing infrastructure to map a dev_t to a device name.
+ */
+extern const char *jbd2_dev_to_name(dev_t device);
+
#endif /* __KERNEL__ */
#endif /* _LINUX_JBD2_H */