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init: remove /proc/sys/kernel/real-root-dev 

It is not used anymore.

Signed-off-by: Askar Safin <safinaskar@gmail.com>
Link: https://patch.msgid.link/20251119222407.3333257-4-safinaskar@gmail.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Askar Safin 2025-11-19 22:24:07 +00:00 committed by Christian Brauner
parent c350a65b56
commit e6ce36ccc8
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3 changed files with 0 additions and 27 deletions
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6
Documentation/admin-guide/sysctl/kernel.rst
View File

@ -1235,12 +1235,6 @@ that support this feature.
== =========================================================================== == ===========================================================================
real-root-dev
=============
See Documentation/admin-guide/initrd.rst.
reboot-cmd (SPARC only) reboot-cmd (SPARC only)
======================= =======================

1
include/uapi/linux/sysctl.h
View File

@ -92,7 +92,6 @@ enum
KERN_DOMAINNAME=8, /* string: domainname */ KERN_DOMAINNAME=8, /* string: domainname */
KERN_PANIC=15, /* int: panic timeout */ 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_SPARC_REBOOT=21, /* reboot command on Sparc */
KERN_CTLALTDEL=22, /* int: allow ctl-alt-del to reboot */ KERN_CTLALTDEL=22, /* int: allow ctl-alt-del to reboot */

20
init/do_mounts_initrd.c
View File

@ -8,31 +8,11 @@
unsigned long initrd_start, initrd_end; unsigned long initrd_start, initrd_end;
int initrd_below_start_ok; int initrd_below_start_ok;
static unsigned int real_root_dev; /* do_proc_dointvec cannot handle kdev_t */
static int __initdata mount_initrd = 1; static int __initdata mount_initrd = 1;
phys_addr_t phys_initrd_start __initdata; phys_addr_t phys_initrd_start __initdata;
unsigned long phys_initrd_size __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) static int __init no_initrd(char *str)
{ {
pr_warn("noinitrd option is deprecated and will be removed soon\n"); pr_warn("noinitrd option is deprecated and will be removed soon\n");