[GIT PULL] livepatching for 4.12

[GIT PULL] livepatching for 4.12

[Jiri Kosina]

Linus,

please pull from

  git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching.git for-linus

to receive live patching updates for 4.12 merge window. 

Notice (not to go into the merge log): all the patches that are touching 
other code (especially arch-specific) have been Reviewed/Acked by the 
appropriate maintainer(s). There are three minor merge conflicts pending 
(as reported in linux-next); the respective reports are:

	http://lkml.kernel.org/r/20170322134123.73f29daa@canb.auug.org.au
	http://lkml.kernel.org/r/20170323142734.38b03846@canb.auug.org.au
	http://lkml.kernel.org/r/20170328151341.7ab5a45b@canb.auug.org.au

All three are more or less of a same nature (adding defines for constants 
or structure fields to a similar place, and one context conflict) and very 
easy to resolve. Currently the only one that has already landed in your 
tree is the first one; the two other you'll be getting while merging s390 
and security trees.

If you want me to prepare a branch for you to pull with the resolved 
conflict(s), please let me know.

Thanks.

=====
- per-task consistency model is being added for architectures that support 
  reliable stack dumping (extending this, currently rather trivial set, is 
  currently in the works). This extends the nature of the types of patches
  that can be applied by live patching infrastructure. The code stems from
  the design proposal made [1] back in November 2014. It's a hybrid of SUSE's
  kGraft and RH's kpatch, combining advantages of both: it uses kGraft's 
  per-task consistency and syscall barrier switching combined with 
  kpatch's stack trace switching.  There are also a number of fallback 
  options which make it quite flexible. Most of the heavy lifting done by 
  Josh Poimboeuf with help from Miroslav Benes and Petr Mladek

- patch module load time optimization from Zhou Chengming

- a few assorted small fixes

[1] https://lkml.kernel.org/r/20141107140458.GA21774@suse.cz
=====

----------------------------------------------------------------
Jiri Kosina (1):
      livepatch: make klp_mutex proper part of API

Jiri Slaby (1):
      livepatch/s390: reorganize TIF thread flag bits

Josh Poimboeuf (14):
      stacktrace/x86: add function for detecting reliable stack traces
      x86/entry: define _TIF_ALLWORK_MASK flags explicitly
      livepatch: create temporary klp_update_patch_state() stub
      livepatch/x86: add TIF_PATCH_PENDING thread flag
      livepatch/powerpc: add TIF_PATCH_PENDING thread flag
      livepatch: separate enabled and patched states
      livepatch: remove unnecessary object loaded check
      livepatch: move patching functions into patch.c
      livepatch: use kstrtobool() in enabled_store()
      livepatch: store function sizes
      livepatch: change to a per-task consistency model
      livepatch: add /proc/<pid>/patch_state
      livepatch: allow removal of a disabled patch
      livepatch: add missing printk newlines

Miroslav Benes (1):
      livepatch/s390: add TIF_PATCH_PENDING thread flag

Petr Mladek (1):
      livepatch: Cancel transition a safe way for immediate patches

Zhou Chengming (1):
      livepatch: Reduce the time of finding module symbols

 Documentation/ABI/testing/sysfs-kernel-livepatch |   8 +
 Documentation/filesystems/proc.txt               |  18 +
 Documentation/livepatch/livepatch.txt            | 214 +++++++--
 arch/Kconfig                                     |   6 +
 arch/powerpc/include/asm/thread_info.h           |   4 +-
 arch/powerpc/kernel/signal.c                     |   4 +
 arch/s390/include/asm/thread_info.h              |  24 +-
 arch/s390/kernel/entry.S                         |  31 +-
 arch/x86/Kconfig                                 |   1 +
 arch/x86/entry/common.c                          |   9 +-
 arch/x86/include/asm/thread_info.h               |  13 +-
 arch/x86/include/asm/unwind.h                    |   6 +
 arch/x86/kernel/stacktrace.c                     |  96 +++-
 arch/x86/kernel/unwind_frame.c                   |   2 +
 fs/proc/base.c                                   |  15 +
 include/linux/init_task.h                        |   9 +
 include/linux/livepatch.h                        |  68 ++-
 include/linux/sched.h                            |   3 +
 include/linux/stacktrace.h                       |   9 +-
 kernel/fork.c                                    |   3 +
 kernel/livepatch/Makefile                        |   2 +-
 kernel/livepatch/core.c                          | 450 +++++++-----------
 kernel/livepatch/core.h                          |   6 +
 kernel/livepatch/patch.c                         | 272 +++++++++++
 kernel/livepatch/patch.h                         |  33 ++
 kernel/livepatch/transition.c                    | 553 +++++++++++++++++++++++
 kernel/livepatch/transition.h                    |  14 +
 kernel/sched/idle.c                              |   4 +
 kernel/stacktrace.c                              |  12 +-
 samples/livepatch/livepatch-sample.c             |  18 +-
 30 files changed, 1548 insertions(+), 359 deletions(-)
 create mode 100644 kernel/livepatch/core.h
 create mode 100644 kernel/livepatch/patch.c
 create mode 100644 kernel/livepatch/patch.h
 create mode 100644 kernel/livepatch/transition.c
 create mode 100644 kernel/livepatch/transition.h

-- 
Jiri Kosina
SUSE Labs