From: Askar Safin <safinaskar@gmail.com>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: "Linus Torvalds" <torvalds@linux-foundation.org>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Christian Brauner" <brauner@kernel.org>,
"Al Viro" <viro@zeniv.linux.org.uk>, "Jan Kara" <jack@suse.cz>,
"Christoph Hellwig" <hch@lst.de>, "Jens Axboe" <axboe@kernel.dk>,
"Andy Shevchenko" <andy.shevchenko@gmail.com>,
"Aleksa Sarai" <cyphar@cyphar.com>,
"Thomas Weißschuh" <thomas.weissschuh@linutronix.de>,
"Julian Stecklina" <julian.stecklina@cyberus-technology.de>,
"Gao Xiang" <hsiangkao@linux.alibaba.com>,
"Art Nikpal" <email2tema@gmail.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Alexander Graf" <graf@amazon.com>,
"Rob Landley" <rob@landley.net>,
"Lennart Poettering" <mzxreary@0pointer.de>,
linux-arch@vger.kernel.org, linux-block@vger.kernel.org,
initramfs@vger.kernel.org, linux-api@vger.kernel.org,
linux-doc@vger.kernel.org, "Michal Simek" <monstr@monstr.eu>,
"Luis Chamberlain" <mcgrof@kernel.org>,
"Kees Cook" <kees@kernel.org>,
"Thorsten Blum" <thorsten.blum@linux.dev>,
"Heiko Carstens" <hca@linux.ibm.com>,
"Arnd Bergmann" <arnd@arndb.de>, "Dave Young" <dyoung@redhat.com>,
"Christophe Leroy" <christophe.leroy@csgroup.eu>,
"Krzysztof Kozlowski" <krzk@kernel.org>,
"Borislav Petkov" <bp@alien8.de>,
"Jessica Clarke" <jrtc27@jrtc27.com>,
"Nicolas Schichan" <nschichan@freebox.fr>,
"David Disseldorp" <ddiss@suse.de>,
patches@lists.linux.dev
Subject: [PATCH v4 3/3] init: remove /proc/sys/kernel/real-root-dev
Date: Wed, 19 Nov 2025 22:24:07 +0000 [thread overview]
Message-ID: <20251119222407.3333257-4-safinaskar@gmail.com> (raw)
In-Reply-To: <20251119222407.3333257-1-safinaskar@gmail.com>
It is not used anymore.
Signed-off-by: Askar Safin <safinaskar@gmail.com>
---
Documentation/admin-guide/sysctl/kernel.rst | 6 ------
include/uapi/linux/sysctl.h | 1 -
init/do_mounts_initrd.c | 20 --------------------
3 files changed, 27 deletions(-)
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index f3ee807b5d8b..218265babaf9 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -1215,12 +1215,6 @@ that support this feature.
== ===========================================================================
-real-root-dev
-=============
-
-See Documentation/admin-guide/initrd.rst.
-
-
reboot-cmd (SPARC only)
=======================
diff --git a/include/uapi/linux/sysctl.h b/include/uapi/linux/sysctl.h
index 63d1464cb71c..1c7fe0f4dca4 100644
--- a/include/uapi/linux/sysctl.h
+++ b/include/uapi/linux/sysctl.h
@@ -92,7 +92,6 @@ enum
KERN_DOMAINNAME=8, /* string: domainname */
KERN_PANIC=15, /* int: panic timeout */
- KERN_REALROOTDEV=16, /* real root device to mount after initrd */
KERN_SPARC_REBOOT=21, /* reboot command on Sparc */
KERN_CTLALTDEL=22, /* int: allow ctl-alt-del to reboot */
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index fe335dbc95e0..892e69ab41c4 100644
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -8,31 +8,11 @@
unsigned long initrd_start, initrd_end;
int initrd_below_start_ok;
-static unsigned int real_root_dev; /* do_proc_dointvec cannot handle kdev_t */
static int __initdata mount_initrd = 1;
phys_addr_t phys_initrd_start __initdata;
unsigned long phys_initrd_size __initdata;
-#ifdef CONFIG_SYSCTL
-static const struct ctl_table kern_do_mounts_initrd_table[] = {
- {
- .procname = "real-root-dev",
- .data = &real_root_dev,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-};
-
-static __init int kernel_do_mounts_initrd_sysctls_init(void)
-{
- register_sysctl_init("kernel", kern_do_mounts_initrd_table);
- return 0;
-}
-late_initcall(kernel_do_mounts_initrd_sysctls_init);
-#endif /* CONFIG_SYSCTL */
-
static int __init no_initrd(char *str)
{
pr_warn("noinitrd option is deprecated and will be removed soon\n");
--
2.47.3
next prev parent reply other threads:[~2025-11-19 22:26 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-19 22:24 [PATCH v4 0/3] initrd: remove half of classic initrd support Askar Safin
2025-11-19 22:24 ` [PATCH v4 1/3] init: remove deprecated "load_ramdisk" and "prompt_ramdisk" command line parameters Askar Safin
2025-11-20 8:20 ` Arnd Bergmann
2025-11-20 23:44 ` Randy Dunlap
2025-12-15 17:59 ` Askar Safin
2025-11-24 14:27 ` Christoph Hellwig
2025-11-19 22:24 ` [PATCH v4 2/3] initrd: remove deprecated code path (linuxrc) Askar Safin
2025-11-24 14:27 ` Christoph Hellwig
2025-11-19 22:24 ` Askar Safin [this message]
2025-11-24 14:28 ` [PATCH v4 3/3] init: remove /proc/sys/kernel/real-root-dev Christoph Hellwig
2025-11-25 9:41 ` Christian Brauner
2025-11-25 9:41 ` [PATCH v4 0/3] initrd: remove half of classic initrd support Christian Brauner
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