From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 15 Dec 2019 19:36:12 +0000 (-0800)
Subject: Merge branch 'remove-ksys-mount-dup' of git://git.kernel.org/pub/scm/linux/kernel... 
X-Git-Tag: v5.15~4887
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2e6d304515ba9936d85265ad93dddc4c13c17d06;p=platform%2Fkernel%2Flinux-starfive.git

Merge branch 'remove-ksys-mount-dup' of git://git./linux/kernel/git/brodo/linux

Pull ksys_mount() and ksys_dup() removal from Dominik Brodowski:
 "This small series replaces all in-kernel calls to the
  userspace-focused ksys_mount() and ksys_dup() with calls to
  kernel-centric functions:

  For each replacement of ksys_mount() with do_mount(), one needs to
  verify that the first and third parameter (char *dev_name, char *type)
  are strings allocated in kernelspace and that the fifth parameter
  (void *data) is either NULL or refers to a full page (only occurence
  in init/do_mounts.c::do_mount_root()). The second and fourth
  parameters (char *dir_name, unsigned long flags) are passed by
  ksys_mount() to do_mount() unchanged, and therefore do not require
  particular care.

  Moreover, instead of pretending to be userspace, the opening of
  /dev/console as stdin/stdout/stderr can be implemented using in-kernel
  functions as well. Thereby, ksys_dup() can be removed for good"

[ This doesn't get rid of the special "kernel init runs with KERNEL_DS"
  case, but it at least removes _some_ of the users of "treat kernel
  pointers as user pointers for our magical init sequence".

  One day we'll hopefully be rid of it all, and can initialize our
  init_thread addr_limit to USER_DS.    - Linus ]

* 'remove-ksys-mount-dup' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux:
  fs: remove ksys_dup()
  init: unify opening /dev/console as stdin/stdout/stderr
  init: use do_mount() instead of ksys_mount()
  initrd: use do_mount() instead of ksys_mount()
  devtmpfs: use do_mount() instead of ksys_mount()
---

2e6d304515ba9936d85265ad93dddc4c13c17d06