linux-kernel - Re: [PATCH 1/6] lib/rhashtable: convert param sanitations to WARN

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Message-ID: <20180528155112.iqsw6x3cdy5piaro@linux-n805>
Date:   Mon, 28 May 2018 08:51:12 -0700
From:   Davidlohr Bueso <dave@...olabs.net>
To:     Herbert Xu <herbert@...dor.apana.org.au>
Cc:     akpm@...ux-foundation.org, torvalds@...ux-foundation.org,
        tgraf@...g.ch, manfred@...orfullife.com,
        guillaume.knispel@...ersonicimagine.com, linux-api@...r.kernel.org,
        linux-kernel@...r.kernel.org, Davidlohr Bueso <dbueso@...e.de>
Subject: Re: [PATCH 1/6] lib/rhashtable: convert param sanitations to WARN_ON

On Mon, 28 May 2018, Herbert Xu wrote:

>On Mon, May 28, 2018 at 06:12:09AM -0700, Davidlohr Bueso wrote:
>>
>> Well, I don't really _want_ them; nor does the ipc code which already
>> does a WARN_ON() (but that goes away in future patches). What I want
>> is to get rid of the return path. So I don't really care if we convert
>> them to WARN or remove them altogether. Would you be happy with the
>> later?
>
>It has nothing to do with the error return path.  Assuming you
>remove the allocation failure path, then this error path can never
>trigger for *your* use-case. 

Why would this be triggered by any use case if the developer setup the
params correctly...? I don't see the point of not getting rid of the
EINVAL or wrapping around warning around it. Ultimately it would be
good to just have rhashtable_init() return void.