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

bosrsf04
2017-02-25T00:22:38Z

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

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2.11.1