[PATCH 0/3] use do_mount() instead of ksys_mount()

[Dominik Brodowski <linux@dominikbrodowski.net>]

This small series replaces all in-kernel calls to the
userspace-focused wrapper ksys_mount() with calls to
the kernel-centric do_mount().

For each replacement, 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.

---

@viro: is this something for you to take and push upstream
for the next cycle?


The same changes (on top of commit ae4b064e2a616b545acf02b8f50cc513b32c7522:

  Merge tag 'afs-fixes-20191211' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs (2019-12-11 18:10:40 -0800)

are also available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux.git remove-ksys-mount

including all changes up to cccaa5e33525fc07f4a2ce0518e50b9ddf435e47:

  init: use do_mount() instead of ksys_mount() (2019-12-12 14:50:05 +0100)

----------------------------------------------------------------
Dominik Brodowski (3):
      devtmpfs: use do_mount() instead of ksys_mount()
      initrd: use do_mount() instead of ksys_mount()
      init: use do_mount() instead of ksys_mount()

 drivers/base/devtmpfs.c  |  6 +++---
 fs/namespace.c           | 10 ++--------
 include/linux/device.h   |  4 ++--
 include/linux/syscalls.h |  2 --
 init/do_mounts.c         | 30 +++++++++++++++++++++++-------
 init/do_mounts_initrd.c  |  6 +++---
 6 files changed, 33 insertions(+), 25 deletions(-)

Thanks,
	Dominik

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2.24.1