ftrace: use raw_smp_processor_id for mcount functions
authorSteven Rostedt <rostedt@goodmis.org>
Mon, 12 May 2008 19:21:02 +0000 (21:21 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Fri, 23 May 2008 20:01:34 +0000 (22:01 +0200)
commit2bb6f8d6389cbfadd657e7dc069f6986abf35e4f
tree894c84bdec4c716b1e16c60e2ab2a1ab198ac11d
parenta4feb8348b62fe76a63cdb5569f5c920f5283c06
ftrace: use raw_smp_processor_id for mcount functions

Due to debug hooks in the kernel that can change the way smp_processor_id
works, use raw_smp_processor_id in mcount called functions (namely
ftrace_record_ip). Currently we annotate most debug functions from calling
mcount, but we should not rely on that to prevent kernel lockups.

This patch uses the raw_smp_processor_id to prevent a recusive crash
that can happen if a debug hook in smp_processor_id calls mcount.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
kernel/trace/ftrace.c