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>
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fs/dax.c
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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,
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}
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if (iov_iter_rw(iter) == WRITE)
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len = copy_from_iter(addr, max - pos, iter);
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len = copy_from_iter_nocache(addr, max - pos, iter);
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else if (!hole)
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len = copy_to_iter(addr, max - pos, iter);
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else
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