linux-kernel - how does 0x##p##q work

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Message-ID: <CAAGnT3YNz+QYaSRPV6Led+HL0rUeva=QwqbVgVSm1tLAFxD0rg@mail.gmail.com>
Date:	Fri, 24 Jul 2015 18:02:15 +0200
From:	Ahmed Soliman <ahmedsoliman0x666@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: how does 0x##p##q work

I was working on cleaning up some files in the crypto dirctory using
checkpatch.pl
and I found this strange define in crypto/gf128mul.c
#define xx(p, q) 0x##p##q
It just seems really weird macro and I cant figure out what is it
supposed to do!!
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