ftrace: Do not test frame pointers if -mfentry is used
authorSteven Rostedt <srostedt@redhat.com>
Wed, 9 Feb 2011 18:27:22 +0000 (13:27 -0500)
committerSteven Rostedt <rostedt@goodmis.org>
Thu, 23 Aug 2012 15:25:29 +0000 (11:25 -0400)
commit781d06248234e221edb560a18461d65808a8a942
tree99e4dcca5af9de75b5beb37a73d3250905613757
parenta2546fae01124fb8063747439300fcf39bac033a
ftrace: Do not test frame pointers if -mfentry is used

The function graph has a test to check if the frame pointer is
corrupted, which can happen with various options of gcc with mcount.
But this is not an issue with -mfentry as -mfentry does not need nor use
frame pointers for function graph tracing.

Link: http://lkml.kernel.org/r/20120807194059.773895870@goodmis.org
Acked-by: H. Peter Anvin <hpa@linux.intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
kernel/trace/trace_functions_graph.c