tree ed79c581aca93bec4122943111d411ce316f5596
parent 0944c0a03465718909ba8e800a5230528aeabafb
parent c1bf08ac26e92122faab9f6c32ea8aba94612dae
author Linus Torvalds <torvalds@linux-foundation.org> 1358879449 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1358879449 -0800
mergetag object c1bf08ac26e92122faab9f6c32ea8aba94612dae
 type commit
 tag trace-3.8-rc4-fix
 tagger Steven Rostedt <rostedt@rostedt.homelinux.com> 1358796287 -0500
 
 Kprobes now uses the function tracer if it can. That is, if a probe
 is placed on a function mcount/nop location, and the arch supports it,
 instead of adding a breakpoint, kprobes will register a function callback
 as that is much more efficient.
 
 The function tracer requires to update modules before they run, and
 uses the module notifier to do so. But if something else in the module
 notifiers registers a kprobe at one of these locations, before ftrace
 can get to it, then the system could fail.
 
 The function tracer must be initialized early, otherwise module notifiers
 that probe will only work by chance.
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Merge tag 'trace-3.8-rc4-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull ftrace fix from Steven Rostedt:
 "Kprobes now uses the function tracer if it can.  That is, if a probe
  is placed on a function mcount/nop location, and the arch supports it,
  instead of adding a breakpoint, kprobes will register a function
  callback as that is much more efficient.

  The function tracer requires to update modules before they run, and
  uses the module notifier to do so.  But if something else in the
  module notifiers registers a kprobe at one of these locations, before
  ftrace can get to it, then the system could fail.

  The function tracer must be initialized early, otherwise module
  notifiers that probe will only work by chance."

* tag 'trace-3.8-rc4-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  ftrace: Be first to run code modification on modules