UBIFS: add a log overlap assertion

Add an assertion which checkes that the head of the log never overlaps with the
tail of the log.

Suggested-by: hujianyang <hujianyang@huawei.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

diff --git a/fs/ubifs/misc.h b/fs/ubifs/misc.h
index ee7cb5ebb6e8910f851469bce4dcb205785cb85c..81bbf796eb279f4051bb66f0d2d926587f227b8e 100644 (file)
--- a/fs/ubifs/misc.h
+++ b/fs/ubifs/misc.h
@@ -297,6 +297,7 @@ static inline int ubifs_next_log_lnum(const struct ubifs_info *c, int lnum)
        if (lnum > c->log_last)
                lnum = UBIFS_LOG_LNUM;
 
+       ubifs_assert(lnum != c->ltail_lnum);
        return lnum;
 }