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tracing/documentation: Cover new frame pointer semantics

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Update the graph tracer examples to cover the new frame pointer semantics
(in terms of passing it along).  Move the HAVE_FUNCTION_GRAPH_FP_TEST docs
out of the Kconfig, into the right place, and expand on the details.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
LKML-Reference: <1264165967-18938-1-git-send-email-vapier@gentoo.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Mike Frysinger
2010-01-22 08:12:47 -05:00
committed by Steven Rostedt
parent 6993b1bb1e
commit 0368897034
2 changed files with 24 additions and 6 deletions
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kernel/trace/Kconfig
+1 -3
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@@ -27,9 +27,7 @@ config HAVE_FUNCTION_GRAPH_TRACER
config HAVE_FUNCTION_GRAPH_FP_TEST
bool
help
An arch may pass in a unique value (frame pointer) to both the
entering and exiting of a function. On exit, the value is compared
and if it does not match, then it will panic the kernel.
See Documentation/trace/ftrace-design.txt
config HAVE_FUNCTION_TRACE_MCOUNT_TEST
bool