iov_iter: unify iterate_iovec and iterate_kvec

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The differences between iterate_iovec and iterate_kvec are minor:
	* kvec callback is treated as if it returned 0
	* initialization of __p is with i->iov and i->kvec resp.
which is trivially dealt with.

No code generation changes - compiler is quite capable of turning
	left = ((void)(STEP), 0);
	__v.iov_len -= left;
(with no accesses to left downstream) and
	(void)(STEP);
into the same code.

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

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Al Viro 2021-04-25 23:57:42 -04:00

parent 7a1bcb5d25

commit 5c67aa90cd

1 changed files with 5 additions and 23 deletions

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lib/iov_iter.c

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