From: Cixi Geng <cixi.geng1@xxxxxxxxxx> Introduce new configuration option GCOV_PROFILE_PREREQS that can be used to check whether the prerequisites for enabling gcov profiling for specific files and directories are met. Only add SERIAL_GCOV for an example. Signed-off-by: Cixi Geng <cixi.geng1@xxxxxxxxxx> --- drivers/tty/serial/Kconfig | 7 +++++++ drivers/tty/serial/Makefile | 1 + kernel/gcov/Kconfig | 9 +++++++++ 3 files changed, 17 insertions(+) diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 1044fc387691..fa33710c8435 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -1586,3 +1586,10 @@ endmenu config SERIAL_MCTRL_GPIO tristate + +config SERIAL_GCOV + bool "Enable profile gcov for serial directory" + depends on GCOV_PROFILE_PREREQS + help + The SERIAL_GCOV will add Gcov profiling flags when kernel compiles. + Say 'Y' here if you want the gcov data for the serial directory, diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index caf167f0c10a..4a4934622c3f 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -3,6 +3,7 @@ # Makefile for the kernel serial device drivers. # +GCOV_PROFILE := $(CONFIG_SERIAL_GCOV) obj-$(CONFIG_SERIAL_CORE) += serial_core.o obj-$(CONFIG_SERIAL_EARLYCON) += earlycon.o diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig index 3110c77230c7..ce9b8ce4e63b 100644 --- a/kernel/gcov/Kconfig +++ b/kernel/gcov/Kconfig @@ -51,4 +51,13 @@ config GCOV_PROFILE_ALL larger and run slower. Also be sure to exclude files from profiling which are not linked to the kernel image to prevent linker errors. +config GCOV_PROFILE_PREREQS + bool "Profile Kernel for prereqs" + def_bool y if GCOV_KERNEL && !COMPILE_TEST + help + This options activates profiling for the specified kernel modules. + When some modules need Gcov data, enable this config, then configure + with gcov on the corresponding modules,The directories or files of + these modules will be added profiling flags after kernel compile. + endmenu -- 2.25.1
