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

kmap_local_page() is enough.

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

diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index 8aff4eb..ba7eb65 100644 (file)
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -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);