diff --git a/[refs] b/[refs]
index 39f0882a5b29..45dc215f798c 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 85f40aec887110ae6bbefa87988def4606a3d583
+refs/heads/master: d28574e043e8b7cb35482de6e9a553118a32803d
diff --git a/trunk/include/linux/fs.h b/trunk/include/linux/fs.h
index 7617ee04f066..7d2e893ec3d1 100644
--- a/trunk/include/linux/fs.h
+++ b/trunk/include/linux/fs.h
@@ -301,7 +301,7 @@ size_t iov_iter_copy_from_user(struct page *page,
 		struct iov_iter *i, unsigned long offset, size_t bytes);
 void iov_iter_advance(struct iov_iter *i, size_t bytes);
 int iov_iter_fault_in_readable(struct iov_iter *i, size_t bytes);
-size_t iov_iter_single_seg_count(struct iov_iter *i);
+size_t iov_iter_single_seg_count(const struct iov_iter *i);
 
 static inline void iov_iter_init(struct iov_iter *i,
 			const struct iovec *iov, unsigned long nr_segs,
diff --git a/trunk/mm/filemap.c b/trunk/mm/filemap.c
index 83efee76a5c0..24a7ea583f0c 100644
--- a/trunk/mm/filemap.c
+++ b/trunk/mm/filemap.c
@@ -2056,7 +2056,7 @@ EXPORT_SYMBOL(iov_iter_fault_in_readable);
 /*
  * Return the count of just the current iov_iter segment.
  */
-size_t iov_iter_single_seg_count(struct iov_iter *i)
+size_t iov_iter_single_seg_count(const struct iov_iter *i)
 {
 	const struct iovec *iov = i->iov;
 	if (i->nr_segs == 1)