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| author | Al Viro <viro@zeniv.linux.org.uk> | 2021-04-27 12:29:53 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2021-06-10 11:45:22 -0400 |
| commit | c1d4d6a9ae88b87262fb5426823930bc471f6034 (patch) | |
| tree | ecdcc96e3a00ddb580c968f7fb26f9b0b43d58df /lib/iov_iter.c | |
| parent | 4b179e9a9c7c98550747b76405626dd59968f078 (diff) | |
| download | lwn-c1d4d6a9ae88b87262fb5426823930bc471f6034.tar.gz lwn-c1d4d6a9ae88b87262fb5426823930bc471f6034.zip | |
copy_page_to_iter(): don't bother with kmap_atomic() for bvec/kvec cases
kmap_local_page() is enough there. Moreover, we can use _copy_to_iter()
for actual copying in those cases - no useful extra checks on the
address we are copying from in that call.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'lib/iov_iter.c')
| -rw-r--r-- | lib/iov_iter.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/iov_iter.c b/lib/iov_iter.c index d5f750cc6f4a..8aff4eb4fdfd 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -821,9 +821,9 @@ static size_t __copy_page_to_iter(struct page *page, size_t offset, size_t bytes if (likely(iter_is_iovec(i))) return copy_page_to_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); - size_t wanted = copy_to_iter(kaddr + offset, bytes, i); - kunmap_atomic(kaddr); + void *kaddr = kmap_local_page(page); + size_t wanted = _copy_to_iter(kaddr + offset, bytes, i); + kunmap_local(kaddr); return wanted; } if (iov_iter_is_pipe(i)) |