linux-kernel - Re: [PATCH] mm-move-mremap-from-file_operations-to-vm_operations

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Message-ID: <20150717181940.GA946@redhat.com>
Date:	Fri, 17 Jul 2015 20:19:40 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Austin S Hemmelgarn <ahferroin7@...il.com>
Cc:	Benjamin LaHaise <bcrl@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Joonsoo Kim <js1304@...il.com>,
	Fengguang Wu <fengguang.wu@...el.com>,
	Jeff Moyer <jmoyer@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH]
	mm-move-mremap-from-file_operations-to-vm_operations_struct-fix

On 07/17, Austin S Hemmelgarn wrote:
>
> On 2015-07-17 13:55, Oleg Nesterov wrote:
>> On 07/17, Benjamin LaHaise wrote:
>>>
>>> Don't add BUG().  It's the equivalent approach of saying "I think this code
>>> isn't needed, but I'm lazy and not going to remove it properly."
>>
>> There is another interpretation: I think this code must be never called,
>> if it is actually called we have a serious problem which should be loudly
>> reported.
>>
> And not compiling it at all _will_ loudly report it, it'll just report
> it during linking instead of at run-time, which is a much better time to
> shout about it.

And how can we do this?

Oleg.

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