new primitive: iov_iter_for_each_range()

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For kvec and bvec: feeds segments to given callback as long as it
returns 0.  For iovec and pipe: fails.

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

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Al Viro 2017-02-18 01:44:03 -05:00

parent 6d1ff4d6f3

commit 09cf698a59

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lib/iov_iter.c

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