dax: Use copy_from_iter_nocache

When userspace does a write, there's no need for the written data to pollute the CPU cache. This matches the original XIP code. Signed-off-by: Matthew Wilcox <[email protected]> Signed-off-by: Al Viro <[email protected]>
niw · Jul 4, 2015 · 872eb12 · 872eb12
1 parent 44f4c05
commit 872eb12
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fs/dax.c b/fs/dax.c
@@ -155,7 +155,7 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter,
 		}
 
 		if (iov_iter_rw(iter) == WRITE)
-			len = copy_from_iter(addr, max - pos, iter);
+			len = copy_from_iter_nocache(addr, max - pos, iter);
 		else if (!hole)
 			len = copy_to_iter(addr, max - pos, iter);
 		else