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-rw-r--r--fs/ubifs/misc.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/fs/ubifs/misc.h b/fs/ubifs/misc.h
index c3de04dc952a..0b5296a9a4c5 100644
--- a/fs/ubifs/misc.h
+++ b/fs/ubifs/misc.h
@@ -340,4 +340,21 @@ static inline void ubifs_release_lprops(struct ubifs_info *c)
mutex_unlock(&c->lp_mutex);
}
+/**
+ * ubifs_next_log_lnum - switch to the next log LEB.
+ * @c: UBIFS file-system description object
+ * @lnum: current log LEB
+ *
+ * This helper function returns the log LEB number which goes next after LEB
+ * 'lnum'.
+ */
+static inline int ubifs_next_log_lnum(const struct ubifs_info *c, int lnum)
+{
+ lnum += 1;
+ if (lnum > c->log_last)
+ lnum = UBIFS_LOG_LNUM;
+
+ return lnum;
+}
+
#endif /* __UBIFS_MISC_H__ */