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dax: Use copy_from_iter_nocache

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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>
This commit is contained in:
Matthew Wilcox 2015-07-03 10:40:39 -04:00 • committed by Al Viro
parent 44f4c054ca
commit 872eb127e3
1 changed files with 1 additions and 1 deletions
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fs/dax.c
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@ -155,7 +155,7 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter,
} }
if (iov_iter_rw(iter) == WRITE) 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) else if (!hole)
len = copy_to_iter(addr, max - pos, iter); len = copy_to_iter(addr, max - pos, iter);
else else