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H A Dtmpfs_vnops.cdiff 212650 Wed Sep 15 08:42:13 MDT 2010 avg tmpfs, zfs + sendfile: mark page bits as valid after populating it with data

Otherwise, adding insult to injury, in addition to double-caching of data
we would always copy the data into a vnode's vm object page from backend.
This is specific to sendfile case only (VOP_READ with UIO_NOCOPY).

PR: kern/141305
Reported by: Wiktor Niesiobedzki <bsd@vink.pl>
Reviewed by: alc
Tested by: tools/regression/sockets/sendfile
MFC after: 2 weeks

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