pipe_zero(): we don't need no stinkin' kmap_atomic()...

	FWIW, memcpy_to_page() itself almost certainly ought to
use kmap_local_page()...

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

diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index 3b442d25a966d5ffbfede77e3e2270b998988eb1..a827991f264498bd6e5e8652f7e6dfb9abcca257 100644 (file)
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -897,7 +897,9 @@ static size_t pipe_zero(size_t bytes, struct iov_iter *i)
 
        do {
                size_t chunk = min_t(size_t, n, PAGE_SIZE - off);
-               memzero_page(pipe->bufs[i_head & p_mask].page, off, chunk);
+               char *p = kmap_local_page(pipe->bufs[i_head & p_mask].page);
+               memset(p + off, 0, chunk);
+               kunmap_local(p);
                i->head = i_head;
                i->iov_offset = off + chunk;
                n -= chunk;