staging/zcache: don't use PTR_RET().
authorRusty Russell <rusty@rustcorp.com.au>
Mon, 15 Jul 2013 01:54:08 +0000 (11:24 +0930)
committerRusty Russell <rusty@rustcorp.com.au>
Mon, 15 Jul 2013 01:55:05 +0000 (11:25 +0930)
We've already tested that it's an error.

Cc: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

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