linux-ext4 - [PATCHv1, RFC 30/33] ext4: relax assert in ext4_da_page_release

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Message-Id: <1469493335-3622-31-git-send-email-kirill.shutemov@linux.intel.com>
Date:	Tue, 26 Jul 2016 03:35:32 +0300
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	"Theodore Ts'o" <tytso@....edu>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	Jan Kara <jack@...e.com>
Cc:	Alexander Viro <viro@...iv.linux.org.uk>,
	Hugh Dickins <hughd@...gle.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Hansen <dave.hansen@...el.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Matthew Wilcox <willy@...radead.org>,
	Ross Zwisler <ross.zwisler@...ux.intel.com>,
	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-block@...r.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCHv1, RFC 30/33] ext4: relax assert in ext4_da_page_release_reservation()

For huge pages 'stop' must be within HPAGE_PMD_SIZE.
Let's use hpage_size() in the BUG_ON().

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
---
 fs/ext4/inode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 744bba046268..2e22f62f007b 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1550,7 +1550,7 @@ static void ext4_da_page_release_reservation(struct page *page,
 	int num_clusters;
 	ext4_fsblk_t lblk;
 
-	BUG_ON(stop > PAGE_SIZE || stop < length);
+	BUG_ON(stop > hpage_size(page) || stop < length);
 
 	head = page_buffers(page);
 	bh = head;
-- 
2.8.1

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