Thank you for guidances, I will fix error and upload new patch Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> 于2020年5月20日周三 下午4:51写道： > > On Wed, May 20, 2020 at 04:38:21PM +0800, gengcixi@xxxxxxxxx wrote: > > From: Cixi Geng <cixi.geng1@xxxxxxxxxx> > > > > --- > > Replace symbol GCOV_PROFILE_MODULES with GCOV_PROFILE_PREREQS > > --- > > The CONFIG_GCOV_PROFILE_ALL will compile kernel by profiling entire > > kernel which will lead to kernel run slower.Use GCOV_PROFILE_PREREQS > > to control part of the kernel modules to open gcov. > > > > Only add SERIAL_GCOV for an example. > > > > Signed-off-by: Cixi Geng <cixi.geng1@xxxxxxxxxx> > > --- > > drivers/tty/serial/Kconfig | 6 ++++++ > > drivers/tty/serial/Makefile | 1 + > > kernel/gcov/Kconfig | 14 ++++++++++++++ > > 3 files changed, 21 insertions(+) > > > > diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig > > index adf9e80e7dc9..964df1a2989c 100644 > > --- a/drivers/tty/serial/Kconfig > > +++ b/drivers/tty/serial/Kconfig > > @@ -1566,3 +1566,9 @@ endmenu > > > > config SERIAL_MCTRL_GPIO > > tristate > > + > > +config SERIAL_GCOV > > + bool "open gcov for serial" > > What do you mean by "open"? And Kconfig entries are usually Upper Case" :) > > > + depends on GCOV_PROFILE_PREREQS > > + help > > + Say Y here to enable gcov in serial. > > I think we need more text here. > > > > diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile > > index d056ee6cca33..7be1202286d2 100644 > > --- a/drivers/tty/serial/Makefile > > +++ b/drivers/tty/serial/Makefile > > @@ -2,6 +2,7 @@ > > # > > # Makefile for the kernel serial device drivers. > > # > > +GCOV_PROFILE := $(CONFIG_SERIAL_GCOV) > > > > obj-$(CONFIG_SERIAL_CORE) += serial_core.o > > > > diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig > > index 3941a9c48f83..91cc8f3c7c43 100644 > > --- a/kernel/gcov/Kconfig > > +++ b/kernel/gcov/Kconfig > > @@ -51,6 +51,20 @@ 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 subsytem" > > + depends on !COMPILE_TEST > > + depends on GCOV_KERNEL > > + default n > > default is always 'n', no need to list that > > > + help > > + This options activates profiling for the specified kernel modules. > > + > > + If unsure, say N. > > + > > + When some modules need Gcov data, enable this config, then configure > > + with gcov on the corresponding modules configs.The directories or files > > '. '? > > > + of these modules will be added profiling flags after kernel compile. > > The lines under "help" need to be indented more, right? > > thanks, > > greg k-h
