Messages in this thread Patch in this message | | | From | Al Viro <> | Subject | [RFC PATCH 35/37] pipe_zero(): we don't need no stinkin' kmap_atomic()... | Date | Sun, 6 Jun 2021 19:10:49 +0000 |
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FWIW, memcpy_to_page() itself almost certainly ought to use kmap_local_page()...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> --- lib/iov_iter.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/lib/iov_iter.c b/lib/iov_iter.c index 56d2606a47e4..7471fb181643 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -908,7 +908,9 @@ 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; -- 2.11.0
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