new primitive: iov_iter_alignment()
authorAl Viro <viro@zeniv.linux.org.uk>
Wed, 5 Mar 2014 18:50:45 +0000 (13:50 -0500)
committerAl Viro <viro@zeniv.linux.org.uk>
Tue, 6 May 2014 21:32:47 +0000 (17:32 -0400)
returns the value aligned as badly as the worst remaining segment
in iov_iter is.  Use instead of open-coded equivalents.

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

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