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ftrace/x86: Add support for C version of recordmcount

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This patch adds the support for the C version of recordmcount and
compile times show ~ 12% improvement.

After verifying this works, other archs can add:

 HAVE_C_MCOUNT_RECORD

in its Kconfig and it will use the C version of recordmcount
instead of the perl version.

Cc: <linux-arch@vger.kernel.org>
Cc: Michal Marek <mmarek@suse.cz>
Cc: linux-kbuild@vger.kernel.org
Cc: John Reiser <jreiser@bitwagon.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt
2010-10-13 17:12:30 -04:00
committed by Steven Rostedt
parent 81d3858d31
commit 72441cb1fd
5 changed files with 17 additions and 0 deletions
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kernel/trace/Kconfig
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@@ -49,6 +49,11 @@ config HAVE_SYSCALL_TRACEPOINTS
help
See Documentation/trace/ftrace-design.txt
config HAVE_C_MCOUNT_RECORD
bool
help
C version of recordmcount available?
config TRACER_MAX_TRACE
bool