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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>
This commit is contained in:
Al Viro 2021-04-30 18:39:25 -04:00
parent 2495bdcc86
commit 893839fd57
1 changed files with 3 additions and 1 deletions
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4
lib/iov_iter.c
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@ -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;