+ inotify-simplify-subdirectory-registration-with-register_sysctl.patch added to -mm tree

+ inotify-simplify-subdirectory-registration-with-register_sysctl.patch added to -mm tree

[akpm]

The patch titled
     Subject: inotify: simplify subdirectory registration with register_sysctl()
has been added to the -mm tree.  Its filename is
     inotify-simplify-subdirectory-registration-with-register_sysctl.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/inotify-simplify-subdirectory-registration-with-register_sysctl.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/inotify-simplify-subdirectory-registration-with-register_sysctl.patch

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Xiaoming Ni <nixiaoming@huawei.com>
Subject: inotify: simplify subdirectory registration with register_sysctl()

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.

Move inotify_user sysctl to inotify_user.c while at it to remove clutter
from kernel/sysctl.c.

[mcgrof@kernel.org: update commit log to reflect new path we decided to take]
Link: https://lkml.kernel.org/r/20211123202422.819032-7-mcgrof@kernel.org
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Amir Goldstein <amir73il@gmail.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Antti Palosaari <crope@iki.fi>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Cc: Clemens Ladisch <clemens@ladisch.de>
Cc: David Airlie <airlied@linux.ie>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Hailong Liu <liu.hailong6@zte.com.cn>
Cc: Iurii Zaikin <yzaikin@google.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Julia Lawall <julia.lawall@inria.fr>
Cc: Kees Cook <keescook@chromium.org>
Cc: Lukas Middendorf <kernel@tuxforce.de>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Paul Turner <pjt@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Phillip Potter <phil@philpotter.co.uk>
Cc: Qing Wang <wangqing@vivo.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Stephen Kitt <steve@sk2.org>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/notify/inotify/inotify_user.c |   11 ++++++++++-
 include/linux/inotify.h          |    3 ---
 kernel/sysctl.c                  |   21 ---------------------
 3 files changed, 10 insertions(+), 25 deletions(-)

--- a/fs/notify/inotify/inotify_user.c~inotify-simplify-subdirectory-registration-with-register_sysctl
+++ a/fs/notify/inotify/inotify_user.c
@@ -58,7 +58,7 @@ struct kmem_cache *inotify_inode_mark_ca
 static long it_zero = 0;
 static long it_int_max = INT_MAX;
 
-struct ctl_table inotify_table[] = {
+static struct ctl_table inotify_table[] = {
 	{
 		.procname	= "max_user_instances",
 		.data		= &init_user_ns.ucount_max[UCOUNT_INOTIFY_INSTANCES],
@@ -87,6 +87,14 @@ struct ctl_table inotify_table[] = {
 	},
 	{ }
 };
+
+static void __init inotify_sysctls_init(void)
+{
+	register_sysctl("fs/inotify", inotify_table);
+}
+
+#else
+#define inotify_sysctls_init() do { } while (0)
 #endif /* CONFIG_SYSCTL */
 
 static inline __u32 inotify_arg_to_mask(struct inode *inode, u32 arg)
@@ -849,6 +857,7 @@ static int __init inotify_user_setup(voi
 	inotify_max_queued_events = 16384;
 	init_user_ns.ucount_max[UCOUNT_INOTIFY_INSTANCES] = 128;
 	init_user_ns.ucount_max[UCOUNT_INOTIFY_WATCHES] = watches_max;
+	inotify_sysctls_init();
 
 	return 0;
 }
--- a/include/linux/inotify.h~inotify-simplify-subdirectory-registration-with-register_sysctl
+++ a/include/linux/inotify.h
@@ -7,11 +7,8 @@
 #ifndef _LINUX_INOTIFY_H
 #define _LINUX_INOTIFY_H
 
-#include <linux/sysctl.h>
 #include <uapi/linux/inotify.h>
 
-extern struct ctl_table inotify_table[]; /* for sysctl */
-
 #define ALL_INOTIFY_BITS (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \
 			  IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \
 			  IN_MOVED_TO | IN_CREATE | IN_DELETE | \
--- a/kernel/sysctl.c~inotify-simplify-subdirectory-registration-with-register_sysctl
+++ a/kernel/sysctl.c
@@ -125,13 +125,6 @@ static const int maxolduid = 65535;
 static const int ngroups_max = NGROUPS_MAX;
 static const int cap_last_cap = CAP_LAST_CAP;
 
-#ifdef CONFIG_INOTIFY_USER
-#include <linux/inotify.h>
-#endif
-#ifdef CONFIG_FANOTIFY
-#include <linux/fanotify.h>
-#endif
-
 #ifdef CONFIG_PROC_SYSCTL
 
 /**
@@ -3099,20 +3092,6 @@ static struct ctl_table fs_table[] = {
 		.proc_handler	= proc_dointvec,
 	},
 #endif
-#ifdef CONFIG_INOTIFY_USER
-	{
-		.procname	= "inotify",
-		.mode		= 0555,
-		.child		= inotify_table,
-	},
-#endif
-#ifdef CONFIG_FANOTIFY
-	{
-		.procname	= "fanotify",
-		.mode		= 0555,
-		.child		= fanotify_table,
-	},
-#endif
 #ifdef CONFIG_EPOLL
 	{
 		.procname	= "epoll",
_

Patches currently in -mm which might be from nixiaoming@huawei.com are

sysctl-add-a-new-register_sysctl_init-interface.patch
sysctl-move-some-boundary-constants-from-sysctlc-to-sysctl_vals.patch
hung_task-move-hung_task-sysctl-interface-to-hung_taskc.patch
watchdog-move-watchdog-sysctl-interface-to-watchdogc.patch
sysctl-use-const-for-typically-used-max-min-proc-sysctls.patch
sysctl-use-sysctl_zero-to-replace-some-static-int-zero-uses.patch
aio-move-aio-sysctl-to-aioc.patch
dnotify-move-dnotify-sysctl-to-dnotifyc.patch
inotify-simplify-subdirectory-registration-with-register_sysctl.patch
eventpoll-simplify-sysctl-declaration-with-register_sysctl.patch