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[3.19.y-ckt,086/196] nfs: fix nfs_size_to_loff_t

Message ID 1457483454-30115-87-git-send-email-kamal@canonical.com
State New
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Commit Message

Kamal Mostafa March 9, 2016, 12:29 a.m. UTC 
3.19.8-ckt16 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Christoph Hellwig <hch@lst.de>

commit 50ab8ec74a153eb30db26529088bc57dd700b24c upstream.

See http: //www.infradead.org/rpr.html
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We support OFFSET_MAX just fine, so don't round down below it.  Also
switch to using min_t to make the helper more readable.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Fixes: 433c92379d9c ("NFS: Clean up nfs_size_to_loff_t()")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 include/linux/nfs_fs.h | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
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Patch

diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 6d627b9..eeed6d1 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -538,9 +538,7 @@  extern int  nfs_readpage_async(struct nfs_open_context *, struct inode *,
 
 static inline loff_t nfs_size_to_loff_t(__u64 size)
 {
-	if (size > (__u64) OFFSET_MAX - 1)
-		return OFFSET_MAX - 1;
-	return (loff_t) size;
+	return min_t(u64, size, OFFSET_MAX);
 }
 
 static inline ino_t