From: Sheng Yong <shengyong1@huawei.com>
Date: Tue, 17 Apr 2018 09:12:27 +0000 (+0800)
Subject: f2fs: check if inmem_pages list is empty correctly
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=d0891e84e1e61938aa8a3b75cb10a34769de022a;p=openwrt%2Fstaging%2Fblogic.git

f2fs: check if inmem_pages list is empty correctly

`cur' will never be NULL, we should check inmem_pages list instead.

Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index e22911f2a378..33d33db15d2f 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -328,7 +328,7 @@ void drop_inmem_page(struct inode *inode, struct page *page)
 			break;
 	}
 
-	f2fs_bug_on(sbi, !cur || cur->page != page);
+	f2fs_bug_on(sbi, list_empty(head) || cur->page != page);
 	list_del(&cur->list);
 	mutex_unlock(&fi->inmem_lock);