[2/5] dax: Use copy_from_iter_nocache
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Message ID 1435608152-6982-3-git-send-email-matthew.r.wilcox@intel.com
State New
Headers show

Commit Message

Wilcox, Matthew R June 29, 2015, 8:02 p.m. UTC
From: Matthew Wilcox <willy@linux.intel.com>

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>
---
 fs/dax.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch
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diff --git a/fs/dax.c b/fs/dax.c
index 6f65f00..159f796 100644
--- 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