linux-ext4 - Re: [PATCH 03/39] proc: introduce proc_create_seq

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Date:   Tue, 24 Apr 2018 16:29:02 +0200
From:   Christoph Hellwig <hch@....de>
To:     Alexey Dobriyan <adobriyan@...il.com>
Cc:     Christoph Hellwig <hch@....de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>, Corey Minyard <minyard@....org>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-acpi@...r.kernel.org, drbd-dev@...ts.linbit.com,
        linux-ide@...r.kernel.org, netdev@...r.kernel.org,
        linux-rtc@...r.kernel.org, megaraidlinux.pdl@...adcom.com,
        linux-scsi@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-afs@...ts.infradead.org, linux-ext4@...r.kernel.org,
        jfs-discussion@...ts.sourceforge.net,
        netfilter-devel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/39] proc: introduce proc_create_seq_private

On Thu, Apr 19, 2018 at 09:50:27PM +0300, Alexey Dobriyan wrote:
> On Thu, Apr 19, 2018 at 02:41:04PM +0200, Christoph Hellwig wrote:
> > Variant of proc_create_data that directly take a struct seq_operations
> 
> > --- a/fs/proc/internal.h
> > +++ b/fs/proc/internal.h
> > @@ -45,6 +45,7 @@ struct proc_dir_entry {
> >  	const struct inode_operations *proc_iops;
> >  	const struct file_operations *proc_fops;
> >  	const struct seq_operations *seq_ops;
> > +	size_t state_size;
> 
> "unsigned int" please.
> 
> Where have you seen 4GB priv states?

We're passing the result of sizeof, which happens to be a size_t.
But if it makes you happy I can switch to unsigned int.