diff --git a/Makefile b/Makefile index 534c09c255de57a41cc7146e22661f5499573d6e..0dd3a8d931329092248f40c8dceaaddd1d887305 100644 --- a/Makefile +++ b/Makefile @@ -568,6 +568,12 @@ endif ifdef CONFIG_FUNCTION_TRACER KBUILD_CFLAGS += -pg +ifdef CONFIG_DYNAMIC_FTRACE + ifdef CONFIG_HAVE_C_MCOUNT_RECORD + BUILD_C_RECORDMCOUNT := y + export BUILD_C_RECORDMCOUNT + endif +endif endif # We trigger additional mismatches with less inlining diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index c14d8b4d2f71ce62935786a39d465133b78fd8c6..788b50ef5fc40a08c6f18b7146901d0570160ffc 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -33,6 +33,7 @@ config X86 select HAVE_KRETPROBES select HAVE_OPTPROBES select HAVE_FTRACE_MCOUNT_RECORD + select HAVE_C_MCOUNT_RECORD select HAVE_DYNAMIC_FTRACE select HAVE_FUNCTION_TRACER select HAVE_FUNCTION_GRAPH_TRACER diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 538501c6ea5058cf703eaa2608307f03f3aee89a..df00fbbaf60904c1b073d44b6040309c42b70e51 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -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 diff --git a/scripts/Makefile b/scripts/Makefile index 842dbc2d5aeda0af27ce18af9914deea370dc329..2e088109fbd5238f3e4f6d293848606d0ac95a58 100644 --- a/scripts/Makefile +++ b/scripts/Makefile @@ -11,6 +11,7 @@ hostprogs-$(CONFIG_KALLSYMS) += kallsyms hostprogs-$(CONFIG_LOGO) += pnmtologo hostprogs-$(CONFIG_VT) += conmakehash hostprogs-$(CONFIG_IKCONFIG) += bin2c +hostprogs-$(BUILD_C_RECORDMCOUNT) += recordmcount always := $(hostprogs-y) $(hostprogs-m) diff --git a/scripts/Makefile.build b/scripts/Makefile.build index a1a5cf95a68d73bd5179474e07b274f77eb5efaf..4d03a7efc68930ffc43c44a428a240cda0c0ec35 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -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) \