linux-kernel - Re: [PATCH v2 3/7] devcoredump: allow to create several coredump files in one device

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Message-ID: <CAC5umyiLgyGambM+umb3GoYV-0Eo-CFiyy5RLhKGTq+fBTcZtQ@mail.gmail.com>
Date:   Thu, 9 May 2019 00:40:14 +0900
From:   Akinobu Mita <akinobu.mita@...il.com>
To:     "Heitke, Kenneth" <kenneth.heitke@...el.com>
Cc:     linux-nvme@...ts.infradead.org,
        LKML <linux-kernel@...r.kernel.org>, Jens Axboe <axboe@...com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Keith Busch <keith.busch@...el.com>,
        Minwoo Im <minwoo.im.dev@...il.com>,
        Johannes Berg <johannes@...solutions.net>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v2 3/7] devcoredump: allow to create several coredump
 files in one device

2019年5月8日(水) 2:35 Heitke, Kenneth <kenneth.heitke@...el.com>:
>
>
>
> On 5/7/2019 10:58 AM, Akinobu Mita wrote:
> > @@ -292,6 +309,12 @@ void dev_coredumpm(struct device *dev, struct module *owner,
> >       if (device_add(&devcd->devcd_dev))
> >               goto put_device;
> >
> > +     for (i = 0; i < devcd->num_files; i++) {
> > +             if (device_create_bin_file(&devcd->devcd_dev,
> > +                                        &devcd->files[i].bin_attr))
> > +                     /* nothing - some files will be missing */;
>
> Is the conditional necessary if you aren't going to do anything?

The device_create_bin_file() is declared with __must_check, so ignoring
the return value emits warning.