Re: linux-next: manual merge of the vfs tree with the parisc-hd tree

From: ebiederm@xmission.com (Eric W. Biederman)
To: Luis Chamberlain <mcgrof@kernel.org>
Cc: Xiaoming Ni <nixiaoming@huawei.com>,
	Al Viro <viro@ZenIV.linux.org.uk>,
	Kees Cook <keescook@chromium.org>,
	Stephen Rothwell <sfr@canb.auug.org.au>,
	Helge Deller <deller@gmx.de>,
	Parisc List <linux-parisc@vger.kernel.org>,
	yzaikin@google.com, linux-fsdevel@vger.kernel.org,
	Linux Next Mailing List <linux-next@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Christoph Hellwig <hch@lst.de>
Subject: Re: linux-next: manual merge of the vfs tree with the parisc-hd tree
Date: Wed, 13 May 2020 08:42:30 -0500	[thread overview]
Message-ID: <87d078oss9.fsf@x220.int.ebiederm.org> (raw)
In-Reply-To: <20200512220341.GE11244@42.do-not-panic.com> (Luis Chamberlain's message of "Tue, 12 May 2020 22:03:41 +0000")

Luis Chamberlain <mcgrof@kernel.org> writes:

> On Tue, May 12, 2020 at 12:40:55PM -0500, Eric W. Biederman wrote:
>> Luis Chamberlain <mcgrof@kernel.org> writes:
>> 
>> > On Tue, May 12, 2020 at 06:52:35AM -0500, Eric W. Biederman wrote:
>> >> Luis Chamberlain <mcgrof@kernel.org> writes:
>> >> 
>> >> > +static struct ctl_table fs_base_table[] = {
>> >> > +	{
>> >> > +		.procname	= "fs",
>> >> > +		.mode		= 0555,
>> >> > +		.child		= fs_table,
>> >> > +	},
>> >> > +	{ }
>> >> > +};
>> >>   ^^^^^^^^^^^^^^^^^^^^^^^^ You don't need this at all.
>> >> > > +static int __init fs_procsys_init(void)
>> >> > +{
>> >> > +	struct ctl_table_header *hdr;
>> >> > +
>> >> > +	hdr = register_sysctl_table(fs_base_table);
>> >>               ^^^^^^^^^^^^^^^^^^^^^ Please use register_sysctl instead.
>> >> 	AKA
>> >>         hdr = register_sysctl("fs", fs_table);
>> >
>> > Ah, much cleaner thanks!
>> 
>> It is my hope you we can get rid of register_sysctl_table one of these
>> days.  It was the original interface but today it is just a
>> compatibility wrapper.
>> 
>> I unfortunately ran out of steam last time before I finished converting
>> everything over.
>
> Let's give it one more go. I'll start with the fs stuff.

Just to be clear moving the tables out of kernel/sysctl.c is a related
but slightly different problem.

Today it looks like there are 35 calls of register_sysctl_table
and 9 calls of register_sysctl_paths.

Among them is lib/sysctl_test.c and check-sysctl-docs.

Meanwhile I can only find 5 calls to register_sysctl in the tree
so it looks like I didn't get very far converting things over.

Eric