linux-kernel - Re: [PATCH v2] fs: ocfs2: Adding new return type vm_fault

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Date:   Sat, 2 Jun 2018 11:46:17 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     mfasheh@...sity.com, Joel Becker <jlbec@...lplan.org>,
        Matthew Wilcox <willy@...radead.org>,
        ocfs2-devel@....oracle.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] fs: ocfs2: Adding new return type vm_fault_t

On Sat, Jun 2, 2018 at 5:17 AM, Andrew Morton <akpm@...ux-foundation.org> wrote:
> On Wed, 23 May 2018 21:02:58 +0530 Souptick Joarder <jrdr.linux@...il.com> wrote:
>
>> Use new return type vm_fault_t for fault handler. For
>> now, this is just documenting that the function returns
>> a VM_FAULT value rather than an errno. Once all instances
>> are converted, vm_fault_t will become a distinct type.
>>
>> Ref-> commit 1c8f422059ae ("mm: change return type to vm_fault_t")
>>
>> vmf_error() is the newly introduce inline function
>> in 4.18.
>>
>> Fix one checkpatch.pl warning by replacing BUG_ON()
>> with WARN_ON()
>
> err, no, I'll revert that part.
>
> It could be that if this assertion triggers then filesystem corruption
> would ensue, in which case a BUG_ON() is the appropriate handling.
> Such a change should be submitted separately, please.
>

In few places checkpatch.pl throwing warning to replace BUG_ON()
with WARN_ON(). Shall we ignore these warning or it will vary across
patches ?