From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] GRE: Use IS_ERR_OR_NULL in gre_gso_segment
Date: Thu, 25 Apr 2013 05:01:57 -0400 (EDT)
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From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Thu, 25 Apr 2013 16:46:17 +0800

> Perhaps add an wrapper for the IS_ERR_OR_NULL with a descriptive
> name?

Or pick an error code for the case covered by NULL.