linux-kernel - [patch 061/149] exofs: confusion between kmap() and kmap

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Date:	Thu, 01 Jul 2010 10:31:27 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Dan Carpenter <error27@...il.com>,
	Boaz Harrosh <bharrosh@...asas.com>
Subject: [patch 061/149] exofs: confusion between kmap() and kmap_atomic() api

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Dan Carpenter <error27@...il.com>

commit ddf08f4b90a413892bbb9bb2e8a57aed991cd47d upstream.

For kmap_atomic() we call kunmap_atomic() on the returned pointer.
That's different from kmap() and kunmap() and so it's easy to get them
backwards.

Signed-off-by: Dan Carpenter <error27@...il.com>
Signed-off-by: Boaz Harrosh <bharrosh@...asas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 fs/exofs/dir.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/exofs/dir.c
+++ b/fs/exofs/dir.c
@@ -608,7 +608,7 @@ int exofs_make_empty(struct inode *inode
 	de->inode_no = cpu_to_le64(parent->i_ino);
 	memcpy(de->name, PARENT_DIR, sizeof(PARENT_DIR));
 	exofs_set_de_type(de, inode);
-	kunmap_atomic(page, KM_USER0);
+	kunmap_atomic(kaddr, KM_USER0);
 	err = exofs_commit_chunk(page, 0, chunk_size);
 fail:
 	page_cache_release(page);


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