[PATCH 0/3] fs: Support compiling out the pivot_root syscall

[bosrsf04@gmail.com]

From: Brian Ashworth <bosrsf04@gmail.com>

This patch series will allow for the pivot_root syscall to be made
optional. The first patch refactors the functions that are required
by pivot_root so they can be accessed outside of fs/namespace.c. The
second patch moves the pivot_root syscall to its own file. The third
adds a Kconfig option and conditional compilation to the Makefile.

The pivot_root syscall is not needed on systems that do not use
any intermediate filesystem. Allowing for pivot_root to be
ommitted from the kernel will aid in the tinification efforts.

Brian Ashworth (3):
  Makes functions used by pivot_root accessible
  Extracts pivot_root so it can be made optional
  Allows for the pivot_root syscall to be omitted

 fs/Makefile     |   2 +
 fs/mount.h      |  24 +++++++++
 fs/namespace.c  | 150 +++-----------------------------------------------------
 fs/pivot_root.c | 129 ++++++++++++++++++++++++++++++++++++++++++++++++
 init/Kconfig    |  10 ++++
 kernel/sys_ni.c |   1 +
 6 files changed, 172 insertions(+), 144 deletions(-)
 create mode 100644 fs/pivot_root.c

-- 
2.11.1