• Linus Torvalds's avatar
    Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching · 76f1948a
    Linus Torvalds authored
    Pull livepatch updates from Jiri Kosina:
    
     - a 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
    
       [1] https://lkml.kernel.org/r/20141107140458.GA21774@suse.cz
    
     - module load time patch optimization from Zhou Chengming
    
     - a few assorted small fixes
    
    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching:
      livepatch: add missing printk newlines
      livepatch: Cancel transition a safe way for immediate patches
      livepatch: Reduce the time of finding module symbols
      livepatch: make klp_mutex proper part of API
      livepatch: allow removal of a disabled patch
      livepatch: add /proc/<pid>/patch_state
      livepatch: change to a per-task consistency model
      livepatch: store function sizes
      livepatch: use kstrtobool() in enabled_store()
      livepatch: move patching functions into patch.c
      livepatch: remove unnecessary object loaded check
      livepatch: separate enabled and patched states
      livepatch/s390: add TIF_PATCH_PENDING thread flag
      livepatch/s390: reorganize TIF thread flag bits
      livepatch/powerpc: add TIF_PATCH_PENDING thread flag
      livepatch/x86: add TIF_PATCH_PENDING thread flag
      livepatch: create temporary klp_update_patch_state() stub
      x86/entry: define _TIF_ALLWORK_MASK flags explicitly
      stacktrace/x86: add function for detecting reliable stack traces
    76f1948a
entry.S 34.4 KB