Add GCOV_PROFILE_FTRACE to allow gcov profiling on only files in ftrace subsystem. This kconfig flag will be used for checking kselftest/ftrace coverage. Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx> --- kernel/trace/Kconfig | 13 +++++++++++++ kernel/trace/Makefile | 5 +++++ 2 files changed, 18 insertions(+) diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index a47f77d27673..a628e8cbc1ef 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -722,6 +722,19 @@ config TRACING_EVENTS_GPIO help Enable tracing events for gpio subsystem +config GCOV_PROFILE_FTRACE + bool "Enable GCOV profiling on ftrace subsystem" + depends on GCOV_KERNEL + help + Enable GCOV profiling on ftrace subsystem for checking + which functions/lines are tested. + + If unsure, say N. + + Note that on a kernel compiled with this flags, ftrace will be + significantly run slower. So do not enable it for production + kernel. + endif # FTRACE endif # TRACING_SUPPORT diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile index e2538c7638d4..443d53392f61 100644 --- a/kernel/trace/Makefile +++ b/kernel/trace/Makefile @@ -18,6 +18,11 @@ ifdef CONFIG_TRACING_BRANCHES KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING endif +# for GCOV coverage profiling +ifdef CONFIG_GCOV_PROFILE_FTRACE +GCOV_PROFILE := y +endif + CFLAGS_trace_benchmark.o := -I$(src) CFLAGS_trace_events_filter.o := -I$(src) -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
