From: Jan Kara <jack@suse•cz>
To: Luis Chamberlain <mcgrof@kernel•org>
Cc: jack@suse•cz, airlied@linux•ie, amir73il@gmail•com,
clemens@ladisch•de, dri-devel@lists•freedesktop.org,
phil@philpotter•co.uk, joseph.qi@linux•alibaba.com,
mark@fasheh•com, yzaikin@google•com,
joonas.lahtinen@linux•intel.com, keescook@chromium•org,
arnd@arndb•de, intel-gfx@lists•freedesktop.org,
jani.nikula@linux•intel.com, viro@zeniv•linux.org.uk,
rodrigo.vivi@intel•com, nixiaoming@huawei•com,
tvrtko.ursulin@linux•intel.com, gregkh@linuxfoundation•org,
linux-kernel@vger•kernel.org, julia.lawall@inria•fr,
ebiederm@xmission•com, linux-fsdevel@vger•kernel.org,
akpm@linux-foundation•org, linuxppc-dev@lists•ozlabs.org,
ocfs2-devel@oss•oracle.com, jlbec@evilplan•org
Subject: Re: [PATCH v2 4/8] ocfs2: simplify subdirectory registration with register_sysctl()
Date: Wed, 24 Nov 2021 10:49:06 +0100 [thread overview]
Message-ID: <20211124094906.GG8583@quack2.suse.cz> (raw)
In-Reply-To: <20211123202422.819032-5-mcgrof@kernel.org>
On Tue 23-11-21 12:24:18, Luis Chamberlain wrote:
> There is no need to user boiler plate code to specify a set of base
> directories we're going to stuff sysctls under. Simplify this by using
> register_sysctl() and specifying the directory path directly.
>
> // pycocci sysctl-subdir-register-sysctl-simplify.cocci PATH
Heh, nice example of using Coccinelle. The result looks good. Feel free to
add:
Reviewed-by: Jan Kara <jack@suse•cz>
Honza
>
> @c1@
> expression E1;
> identifier subdir, sysctls;
> @@
>
> static struct ctl_table subdir[] = {
> {
> .procname = E1,
> .maxlen = 0,
> .mode = 0555,
> .child = sysctls,
> },
> { }
> };
>
> @c2@
> identifier c1.subdir;
>
> expression E2;
> identifier base;
> @@
>
> static struct ctl_table base[] = {
> {
> .procname = E2,
> .maxlen = 0,
> .mode = 0555,
> .child = subdir,
> },
> { }
> };
>
> @c3@
> identifier c2.base;
> identifier header;
> @@
>
> header = register_sysctl_table(base);
>
> @r1 depends on c1 && c2 && c3@
> expression c1.E1;
> identifier c1.subdir, c1.sysctls;
> @@
>
> -static struct ctl_table subdir[] = {
> - {
> - .procname = E1,
> - .maxlen = 0,
> - .mode = 0555,
> - .child = sysctls,
> - },
> - { }
> -};
>
> @r2 depends on c1 && c2 && c3@
> identifier c1.subdir;
>
> expression c2.E2;
> identifier c2.base;
> @@
> -static struct ctl_table base[] = {
> - {
> - .procname = E2,
> - .maxlen = 0,
> - .mode = 0555,
> - .child = subdir,
> - },
> - { }
> -};
>
> @initialize:python@
> @@
>
> def make_my_fresh_expression(s1, s2):
> return '"' + s1.strip('"') + "/" + s2.strip('"') + '"'
>
> @r3 depends on c1 && c2 && c3@
> expression c1.E1;
> identifier c1.sysctls;
> expression c2.E2;
> identifier c2.base;
> identifier c3.header;
> fresh identifier E3 = script:python(E2, E1) { make_my_fresh_expression(E2, E1) };
> @@
>
> header =
> -register_sysctl_table(base);
> +register_sysctl(E3, sysctls);
>
> Generated-by: Coccinelle SmPL
> Signed-off-by: Luis Chamberlain <mcgrof@kernel•org>
> ---
> fs/ocfs2/stackglue.c | 25 +------------------------
> 1 file changed, 1 insertion(+), 24 deletions(-)
>
> diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c
> index 16f1bfc407f2..731558a6f27d 100644
> --- a/fs/ocfs2/stackglue.c
> +++ b/fs/ocfs2/stackglue.c
> @@ -672,31 +672,8 @@ static struct ctl_table ocfs2_mod_table[] = {
> { }
> };
>
> -static struct ctl_table ocfs2_kern_table[] = {
> - {
> - .procname = "ocfs2",
> - .data = NULL,
> - .maxlen = 0,
> - .mode = 0555,
> - .child = ocfs2_mod_table
> - },
> - { }
> -};
> -
> -static struct ctl_table ocfs2_root_table[] = {
> - {
> - .procname = "fs",
> - .data = NULL,
> - .maxlen = 0,
> - .mode = 0555,
> - .child = ocfs2_kern_table
> - },
> - { }
> -};
> -
> static struct ctl_table_header *ocfs2_table_header;
>
> -
> /*
> * Initialization
> */
> @@ -705,7 +682,7 @@ static int __init ocfs2_stack_glue_init(void)
> {
> strcpy(cluster_stack_name, OCFS2_STACK_PLUGIN_O2CB);
>
> - ocfs2_table_header = register_sysctl_table(ocfs2_root_table);
> + ocfs2_table_header = register_sysctl("fs/ocfs2", ocfs2_mod_table);
> if (!ocfs2_table_header) {
> printk(KERN_ERR
> "ocfs2 stack glue: unable to register sysctl\n");
> --
> 2.33.0
>
--
Jan Kara <jack@suse•com>
SUSE Labs, CR
next prev parent reply other threads:[~2021-11-24 9:49 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-23 20:24 [PATCH v2 0/8] sysctl: second set of kernel/sysctl cleanups Luis Chamberlain
2021-11-23 20:24 ` [PATCH v2 1/8] hpet: simplify subdirectory registration with register_sysctl() Luis Chamberlain
2021-11-23 20:24 ` [PATCH v2 2/8] i915: " Luis Chamberlain
2021-11-25 9:41 ` Jani Nikula
2021-11-23 20:24 ` [PATCH v2 3/8] macintosh/mac_hid.c: " Luis Chamberlain
2021-11-23 20:24 ` [PATCH v2 4/8] ocfs2: " Luis Chamberlain
2021-11-24 9:49 ` Jan Kara [this message]
2021-11-23 20:24 ` [PATCH v2 5/8] test_sysctl: " Luis Chamberlain
2021-11-23 20:24 ` [PATCH v2 6/8] inotify: " Luis Chamberlain
2021-11-24 9:44 ` Jan Kara
2021-11-24 13:40 ` Luis Chamberlain
2021-11-23 20:24 ` [PATCH v2 7/8] cdrom: " Luis Chamberlain
2021-11-25 9:23 ` Phillip Potter
2021-11-23 20:24 ` [PATCH v2 8/8] eventpoll: simplify sysctl declaration " Luis Chamberlain
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