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 | 8 ++++++++ drivers/tty/serial/Makefile | 1 + kernel/gcov/Kconfig | 15 +++++++++++++++ 3 files changed, 24 insertions(+) diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index adf9e80e7dc9..3d7e811d90dc 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -1566,3 +1566,11 @@ endmenu config SERIAL_MCTRL_GPIO tristate + +config SERIAL_GCOV + bool "Enable profile gcov for serial directory" + depends on GCOV_PROFILE_PREREQS + default y if 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 d056ee6cca33..17272733db95 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 3941a9c48f83..35b839879553 100644 --- a/kernel/gcov/Kconfig +++ b/kernel/gcov/Kconfig @@ -51,6 +51,21 @@ 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" + depends on !COMPILE_TEST + depends on GCOV_KERNEL + depends on !COMPILE_PROFILE_ALL + default 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. + + If unsure, say N. + choice prompt "Specify GCOV format" depends on GCOV_KERNEL -- 2.17.1
