linux-kernel - [RFC][PATCH 0/2] x86/jump labels: Add the 5 byte or 2 byte jumps

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Message-Id: <20130807173606.872055511@goodmis.org>
Date:	Wed, 07 Aug 2013 13:36:06 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	linux-kernel@...r.kernel.org
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Jason Baron <jbaron@...mai.com>
Subject: [RFC][PATCH 0/2] x86/jump labels: Add the 5 byte or 2 byte jumps

As I said, I would post the patches that let the jmps used by jump labels
be turn to 2 bytes where possible. These are a bit controversial due
to the complexity of the update_jump_label code.

These patches are based off of tip's x86/jumplabel code.

But if someone cares to play with it, feel free. I'll push this up
to my repo under: tip/perf/jump-label-7 (internally this is my 7th version).

I'll post a patch that does the counting as well as a reply to this
post.

Enjoy,

-- Steve


  git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
tip/perf/jump-label-7

Head SHA1: 2a7235814df0cccda60a366fb8b1e5502055ea4d


Steven Rostedt (2):
      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 |    7 +-
 arch/x86/kernel/jump_label.c      |   88 +++++++---
 scripts/Makefile                  |    1 +
 scripts/Makefile.build            |   15 +-
 scripts/update_jump_label.c       |  341 +++++++++++++++++++++++++++++++++++++
 scripts/update_jump_label.h       |  208 ++++++++++++++++++++++
 9 files changed, 649 insertions(+), 25 deletions(-)
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