]> git.karo-electronics.de Git - linux-beck.git/commit
ftrace/alternatives: Introducing *_text_reserved functions
authorMasami Hiramatsu <mhiramat@redhat.com>
Tue, 2 Feb 2010 21:49:11 +0000 (16:49 -0500)
committerIngo Molnar <mingo@elte.hu>
Thu, 4 Feb 2010 08:36:19 +0000 (09:36 +0100)
commit2cfa19780d61740f65790c5bae363b759d7c96fa
treecc7a8277a9f04c1bd613efe03c7d6d16cd18dc96
parent615d0ebbc782b67296e3226c293f520f93f93515
ftrace/alternatives: Introducing *_text_reserved functions

Introducing *_text_reserved functions for checking the text
address range is partially reserved or not. This patch provides
checking routines for x86 smp alternatives and dynamic ftrace.
Since both functions modify fixed pieces of kernel text, they
should reserve and protect those from other dynamic text
modifier, like kprobes.

This will also be extended when introducing other subsystems
which modify fixed pieces of kernel text. Dynamic text modifiers
should avoid those.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: przemyslaw@pawelczyk.it
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Mathieu Desnoyers <compudj@krystal.dyndns.org>
Cc: Jason Baron <jbaron@redhat.com>
LKML-Reference: <20100202214911.4694.16587.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/include/asm/alternative.h
arch/x86/kernel/alternative.c
include/linux/ftrace.h
kernel/trace/ftrace.c