Commit 55ca375c authored by Al Viro's avatar Al Viro
Browse files

copy_page_from_iter(): don't need kmap_atomic() for kvec/bvec cases 



kmap_local_page() is enough.

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent c1d4d6a9

lib/iov_iter.c

+2 −2
Original line number Diff line number Diff line
@@ -871,9 +871,9 @@ size_t copy_page_from_iter(struct page *page, size_t offset, size_t bytes, 
	if (likely(iter_is_iovec(i)))

		return copy_page_from_iter_iovec(page, offset, bytes, i);

	if (iov_iter_is_bvec(i) || iov_iter_is_kvec(i) || iov_iter_is_xarray(i)) {

		void *kaddr = kmap_atomic(page);

		void *kaddr = kmap_local_page(page);

		size_t wanted = _copy_from_iter(kaddr + offset, bytes, i);

		kunmap_atomic(kaddr);

		kunmap_local(kaddr);

		return wanted;

	}

	WARN_ON(1);