Commit 893839fd authored by Al Viro's avatar Al Viro
Browse files

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: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 2495bdcc

lib/iov_iter.c

+3 −1
Original line number Diff line number Diff line
@@ -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;