linux-kernel - [PATCH] proc: register filesystem last

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Message-ID: <20180309222709.GA3843@avx2>
Date:   Sat, 10 Mar 2018 01:27:09 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] proc: register filesystem last

As soon as register_filesystem() exits, filesystem can be mounted.
It is better to present fully operational /proc.

Of course it doesn't matter because /proc is not modular
but do it anyway.

Drop error check, it should be handled by panicking.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 fs/proc/root.c |    8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -123,14 +123,8 @@ static struct file_system_type proc_fs_type = {
 
 void __init proc_root_init(void)
 {
-	int err;
-
 	proc_init_kmemcache();
 	set_proc_pid_nlink();
-	err = register_filesystem(&proc_fs_type);
-	if (err)
-		return;
-
 	proc_self_init();
 	proc_thread_self_init();
 	proc_symlink("mounts", NULL, "self/mounts");
@@ -146,6 +140,8 @@ void __init proc_root_init(void)
 	proc_tty_init();
 	proc_mkdir("bus", NULL);
 	proc_sys_init();
+
+	register_filesystem(&proc_fs_type);
 }
 
 static int proc_root_getattr(const struct path *path, struct kstat *stat,