linux-kernel - [PATCH] proc: mark /proc/cmdline as permanent

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Message-ID: <Y66xAveh2yUsP7m9@p183>
Date:   Fri, 30 Dec 2022 12:36:02 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] proc: mark /proc/cmdline as permanent

/proc/cmdline is never removed, mark is as permanent for slightly faster
open and close.

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

 fs/proc/cmdline.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/proc/cmdline.c
+++ b/fs/proc/cmdline.c
@@ -17,6 +17,7 @@ static int __init proc_cmdline_init(void)
 	struct proc_dir_entry *pde;
 
 	pde = proc_create_single("cmdline", 0, NULL, cmdline_proc_show);
+	pde_make_permanent(pde);
 	pde->size = saved_command_line_len + 1;
 	return 0;
 }