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Date: Mon, 18 May 2015 15:27:23 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Leon Romanovsky <leon@leon.nu>
Cc: dhowells@redhat.com, aarcange@redhat.com, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: nommu: convert kenter/kleave/kdebug macros to use
 pr_devel()
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On Mon, 18 May 2015 21:42:06 +0300 Leon Romanovsky <leon@leon.nu> wrote:

> kenter/kleave/kdebug are wrapper macros to print functions flow and debug
> information. This set was written before pr_devel() was introduced, so
> it was controlled by "#if 0" construction.
> 
> This patch refactors the current macros to use general pr_devel()
> functions which won't be compiled in if "#define DEBUG" is not declared
> prior to that macros.

I doubt if anyone has used these in a decade and only a tenth of the
mm/nommu.c code is actually wired up to use the macros.

I'd suggest just removing it all.  If someone later has a need, they
can add their own pr_devel() calls.