Patch "dax: fix vma_is_fsdax() helper" has been added to the 4.14-stable tree

This is a note to let you know that I've just added the patch titled

dax: fix vma_is_fsdax() helper

to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
dax-fix-vma_is_fsdax-helper.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Dan Williams <[email protected]>
Date: Wed, 21 Feb 2018 17:08:01 -0800
Subject: dax: fix vma_is_fsdax() helper

From: Dan Williams <[email protected]>

commit 230f5a8969d8345fc9bbe3683f068246cf1be4b8 upstream.

Gerd reports that ->i_mode may contain other bits besides S_IFCHR. Use S_ISCHR() instead. Otherwise, get_user_pages_longterm() may fail on device-dax instances when those are meant to be explicitly allowed.

---
 include/linux/fs.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -3185,7 +3185,7 @@ static inline bool vma_is_fsdax(struct v
 	if (!vma_is_dax(vma))
 		return false;
 	inode = file_inode(vma->vm_file);
-	if (inode->i_mode == S_IFCHR)
+	if (S_ISCHR(inode->i_mode))
 		return false; /* device-dax */
 	return true;
 }

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/dax-fix-vma_is_fsdax-helper.patch queue-4.14/vfio-disable-filesystem-dax-page-pinning.patch