1 files changed, 18 insertions, 0 deletions

diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c
index 6510d6355729..2d04f9afafd7 100644
--- a/fs/jbd/journal.c
+++ b/fs/jbd/journal.c
@@ -90,6 +90,24 @@ static int journal_convert_superblock_v1(journal_t *, journal_superblock_t *);
 static void __journal_abort_soft (journal_t *journal, int errno);
 static const char *journal_dev_name(journal_t *journal, char *buffer);
 
+#ifdef CONFIG_JBD_DEBUG
+void __jbd_debug(int level, const char *file, const char *func,
+                 unsigned int line, const char *fmt, ...)
+{
+        struct va_format vaf;
+        va_list args;
+
+        if (level > journal_enable_debug)
+                return;
+        va_start(args, fmt);
+        vaf.fmt = fmt;
+        vaf.va = &args;
+        printk(KERN_DEBUG "%s: (%s, %u): %pV\n", file, func, line, &vaf);
+        va_end(args);
+}
+EXPORT_SYMBOL(__jbd_debug);
+#endif
+
 /*
  * Helper function used to manage commit timeouts
  */