linux-kernel - [PATCH 0/5 v2] [GIT PULL] x86/jump label: Paranoid checks and 2 or 5 byte nops

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Date:	Sat, 28 Jan 2012 11:09:25 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	linux-kernel@...r.kernel.org
Cc:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jason Baron <jbaron@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: [PATCH 0/5 v2] [GIT PULL] x86/jump label: Paranoid checks and 2 or 5 byte nops


Ingo,

This is the second round with the suggestions made by Peter and Andrew
incorporated (and tested).

We can still let this code sit on LKML for a little bit, to give time
for anyone else that wants to complain about them ;-)

Changes for v2:
	Used GENERIC_NOP5_ATOMIC instead of open coding the nop.
	 (suggested by H. Peter Anvin)

	I also added a comment to the code that explains that the
	JUMP_LABEL_INIT_NOP must match the update_jump_label.c code.

	Used const pointers for default_nop and short_nop.
	 (suggested by Andrew Morton)

Please pull (again, if everyone is OK with them) the latest
 tip/perf/jump-label-2 tree, which can be found at:

  git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
tip/perf/jump-label-2

Head SHA1: 78498e6a36ca3d192ee6a151d8c081525e6c9abe


Steven Rostedt (5):
      x86/jump-label: Use best default nops for inital jump label calls
      x86/jump-label: Do not bother updating nops if they are correct
      x86/jump-label: Add safety checks to jump label conversions
      jump labels: Add infrastructure to update jump labels at compile time
      x86/jump labels: Use etiher 5 byte or 2 byte jumps

----
 Makefile                          |    7 +
 arch/Kconfig                      |    6 +
 arch/x86/Kconfig                  |    1 +
 arch/x86/include/asm/jump_label.h |   14 ++-
 arch/x86/kernel/jump_label.c      |  109 +++++++++++-
 scripts/Makefile                  |    1 +
 scripts/Makefile.build            |   15 ++-
 scripts/update_jump_label.c       |  341 +++++++++++++++++++++++++++++++++++++
 scripts/update_jump_label.h       |  208 ++++++++++++++++++++++
 9 files changed, 688 insertions(+), 14 deletions(-)

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