iov_iter: clean csum_and_copy_...() primitives up a bit

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1) kmap_atomic() is not needed here, kmap_local_page() is enough.
2) No need to make sum = csum_block_add(sum, next, off); conditional
upon next != 0 - adding 0 is a no-op as far as csum_block_add()
is concerned.

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

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Al Viro 2021-04-30 13:40:48 -04:00

parent 55ca375c5d

commit 2495bdcc86

1 changed files with 4 additions and 6 deletions

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lib/iov_iter.c

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