• Masami Hiramatsu's avatar
    ftrace/alternatives: Introducing *_text_reserved functions · 2cfa1978
    Masami Hiramatsu authored
    
    
    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: default avatarMasami 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: default avatarIngo Molnar <mingo@elte.hu>
    2cfa1978
ftrace.h 14 KB