linux-kernel - Re: [PATCH V6] GCOV: Add config to check the preqequisites situation

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Date:   Thu, 16 Jul 2020 20:38:25 +0800
From:   Cixi Geng <gengcixi@...il.com>
To:     Greg KH <gregkh@...uxfoundation.org>, jslaby@...e.com,
        Peter Oberparleiter <oberpar@...ux.ibm.com>,
        linux-serial@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:     Cixi Geng1 <cixi.geng1@...soc.com>,
        Orson Zhai <orsonzhai@...il.com>, zhang.lyra@...il.com
Subject: Re: [PATCH V6] GCOV: Add config to check the preqequisites situation

Hi All:
Does this patch need more modification?



> 发件人: gengcixi@...il.com <gengcixi@...il.com>
> 发送时间: 2020年6月18日 18:08
> 收件人: gregkh@...uxfoundation.org; jslaby@...e.com; oberpar@...ux.ibm.com; linux-serial@...r.kernel.org; linux-kernel@...r.kernel.org
> 抄送: orsonzhai@...il.com; zhang.lyra@...il.com; 耿慈熙 (Cixi Geng/10039)
> 主题: [PATCH V6] GCOV: Add config to check the preqequisites situation
>
> From: Cixi Geng <cixi.geng1@...soc.com>
>
> 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@...soc.com>
> ---
>  drivers/tty/serial/Kconfig  |  7 +++++++
>  drivers/tty/serial/Makefile |  1 +
>  kernel/gcov/Kconfig         | 10 ++++++++++
>  3 files changed, 18 insertions(+)
>
> diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
> index adf9e80e7dc9..6df002370f18 100644
> --- a/drivers/tty/serial/Kconfig
> +++ b/drivers/tty/serial/Kconfig
> @@ -1566,3 +1566,10 @@ 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 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..f415c4aaf0ab 100644
> --- a/kernel/gcov/Kconfig
> +++ b/kernel/gcov/Kconfig
> @@ -51,6 +51,16 @@ 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"
> +       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.
> +
>  choice
>         prompt "Specify GCOV format"
>         depends on GCOV_KERNEL
> --
> 2.17.1