new helper: iter_is_iovec()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/mm/shmem.c b/mm/shmem.c
index 185836ba53ef..73ba1df7c8ba 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1536,7 +1536,7 @@ static ssize_t shmem_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
          * holes of a sparse file, we actually need to allocate those pages,
          * and even mark them dirty, so it cannot exceed the max_blocks limit.
          */
-        if (segment_eq(get_fs(), KERNEL_DS))
+        if (!iter_is_iovec(to))
                 sgp = SGP_DIRTY;
 
         index = *ppos >> PAGE_CACHE_SHIFT;