From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Date: Wed, 16 Jul 2014 12:29:21 +0000 (+0300)
Subject: UBIFS: add a log overlap assertion
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=545f7fdf6db866c26ac92346b35bc6489fb926d1;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git

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 ee7cb5ebb6e8..81bbf796eb27 100644
--- 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;
 }