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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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4
scripts/Makefile.build
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@@ -209,12 +209,16 @@ cmd_modversions = \
endif
ifdef CONFIG_FTRACE_MCOUNT_RECORD
ifdef BUILD_C_RECORDMCOUNT
cmd_record_mcount = $(srctree)/scripts/recordmcount "$(@)";
else
cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
"$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
"$(if $(CONFIG_64BIT),64,32)" \
"$(OBJDUMP)" "$(OBJCOPY)" "$(CC)" "$(LD)" "$(NM)" "$(RM)" "$(MV)" \
"$(if $(part-of-module),1,0)" "$(@)";
endif
endif
define rule_cc_o_c
$(call echo-cmd,checksrc) $(cmd_checksrc) \