From: Rusty Russell <rusty@rustcorp.com.au>
Date: Mon, 15 Jul 2013 01:51:32 +0000 (+0930)
Subject: s390: Replace weird use of PTR_RET.
X-Git-Tag: v3.12-rc1~146^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=228b82211b47b597fa75dff2ac146b40eaaddf18;p=pandora-kernel.git

s390: Replace weird use of PTR_RET.

Saves repeating "(void __force *)__uptr" but it's less clear.  Using
the output of PTR_RET() to determine the error rather than just
testing IS_ERR() is odd.

For example, I *assume* __gptr_to_uptr() never returns NULL?  Because
the __ret would be 0 for the old code.  The new version is clearer, IMHO:
it would try to get_user() on that address.

If you hate this variant, I can just s/PTR_RET/PTR_ERR_OR_ZERO/ instead.

Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
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