linux-kernel - Re: [PATCH] headers: untangle kmemleak.h from mm.h

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Message-ID: <20180212072727.saupl35jvwex6hbe@gmail.com>
Date:   Mon, 12 Feb 2018 08:27:27 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, Linux MM <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Fengguang Wu <fengguang.wu@...el.com>,
        iommu@...ts.linux-foundation.org, linuxppc-dev@...ts.ozlabs.org,
        linux-s390 <linux-s390@...r.kernel.org>,
        sparclinux@...r.kernel.org, X86 ML <x86@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        virtualization@...ts.linux-foundation.org,
        John Johansen <john.johansen@...onical.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] headers: untangle kmemleak.h from mm.h


* Randy Dunlap <rdunlap@...radead.org> wrote:

> From: Randy Dunlap <rdunlap@...radead.org>
> 
> Currently <linux/slab.h> #includes <linux/kmemleak.h> for no obvious
> reason. It looks like it's only a convenience, so remove kmemleak.h
> from slab.h and add <linux/kmemleak.h> to any users of kmemleak_*
> that don't already #include it.
> Also remove <linux/kmemleak.h> from source files that do not use it.
> 
> This is tested on i386 allmodconfig and x86_64 allmodconfig. It
> would be good to run it through the 0day bot for other $ARCHes.
> I have neither the horsepower nor the storage space for the other
> $ARCHes.
> 
> [slab.h is the second most used header file after module.h; kernel.h
> is right there with slab.h. There could be some minor error in the
> counting due to some #includes having comments after them and I
> didn't combine all of those.]
> 
> This is Lingchi patch #1 (death by a thousand cuts, applied to kernel
> header files).
> 
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>

Nice find:

Reviewed-by: Ingo Molnar <mingo@...nel.org>

I agree that it needs to go through 0-day to find any hidden dependencies we might 
have grown due to this.

Thanks,

	Ingo