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Merge tag 'vfs-7.0-rc1.initrd' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

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Pull vfs initrd removal from Christian Brauner:
 "Remove the deprecated linuxrc-based initrd code path and related dead
  code. The linuxrc initrd path was deprecated in 2020 and this series
  completes its removal. If we see real-life regressions we'll revert.

  The core change removes handle_initrd() and init_linuxrc() — the
  entire flow that ran /linuxrc from an initrd, pivoted roots, and
  handed off to the real root filesystem. With that gone, initrd_load()
  becomes void (no longer short-circuits prepare_namespace()),
  rd_load_image() is simplified to always load /initrd.image instead of
  taking a path, and rd_load_disk() is deleted.

  The /proc/sys/kernel/real-root-dev sysctl and its backing variable are
  removed since they only existed for linuxrc to communicate the real
  root device back to the kernel.

  The no-op load_ramdisk= and prompt_ramdisk= parameters are dropped,
  and noinitrd and ramdisk_start= gain deprecation warnings.

  Initramfs is entirely unaffected. The non-linuxrc initrd path
  (root=/dev/ram0) is preserved but now carries a deprecation warning
  targeting January 2027 removal"

* tag 'vfs-7.0-rc1.initrd' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  init: remove /proc/sys/kernel/real-root-dev
  initrd: remove deprecated code path (linuxrc)
  init: remove deprecated "load_ramdisk" and "prompt_ramdisk" command line parameters
This commit is contained in:
Linus Torvalds
2026-02-09 11:03:25 -08:00
parent 4b6c6bc6fa ef12d0573a
commit 996812c453
9 changed files with 23 additions and 160 deletions
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12
Documentation/admin-guide/kernel-parameters.txt
View File

@@ -3477,8 +3477,6 @@ Kernel parameters
Enable Live Update Orchestrator (LUO).
Default: off.
load_ramdisk= [RAM] [Deprecated]
lockd.nlm_grace_period=P [NFS] Assign grace period.
Format: <integer>
@@ -4484,8 +4482,10 @@ Kernel parameters
Note that this argument takes precedence over
the CONFIG_RCU_NOCB_CPU_DEFAULT_ALL option.
noinitrd [RAM] Tells the kernel not to load any configured
initial RAM disk.
noinitrd [Deprecated,RAM] Tells the kernel not to load any configured
initial RAM disk. Currently this parameter applies to
initrd only, not to initramfs. But it applies to both
in EFI mode.
nointremap [X86-64,Intel-IOMMU,EARLY] Do not enable interrupt
remapping.
@@ -5442,8 +5442,6 @@ Kernel parameters
Param: <number> - step/bucket size as a power of 2 for
statistical time based profiling.
prompt_ramdisk= [RAM] [Deprecated]
prot_virt= [S390] enable hosting protected virtual machines
isolated from the hypervisor (if hardware supports
that). If enabled, the default kernel base address
@@ -5500,7 +5498,7 @@ Kernel parameters
ramdisk_size= [RAM] Sizes of RAM disks in kilobytes
See Documentation/admin-guide/blockdev/ramdisk.rst.
ramdisk_start= [RAM] RAM disk image start address
ramdisk_start= [Deprecated,RAM] RAM disk image start address
random.trust_cpu=off
[KNL,EARLY] Disable trusting the use of the CPU's