Commit 872eb127 authored Jul 03, 2015 by Matthew Wilcox Committed by Al Viro Jul 04, 2015

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

parent 44f4c054

fs/dax.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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