David Howells 9ea9ce0427 iov_iter: Add I/O discard iterator ...

Add a new iterator, ITER_DISCARD, that can only be used in READ mode and
just discards any data copied to it.

This is useful in a network filesystem for discarding any unwanted data
sent by a server.

Signed-off-by: David Howells <dhowells@redhat.com>

2018-10-24 00:41:07 +01:00

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