From: gengcixi@gmail.com
To: gregkh@linuxfoundation.org, jirislaby@kernel.org,
oberpar@linux.ibm.com, linux-serial@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: orsonzhai@gmail.com, zhang.lyra@gmail.com,
Cixi Geng <cixi.geng1@unisoc.com>
Subject: [PATCH V8] GCOV: Add config to check the preqequisites situation
Date: Wed, 28 Oct 2020 21:15:05 +0800 [thread overview]
Message-ID: <20201028131505.482037-1-gengcixi@gmail.com> (raw)
From: Cixi Geng <cixi.geng1@unisoc.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@unisoc.com>
---
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
next reply other threads:[~2020-10-28 22:10 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-28 13:15 gengcixi [this message]
2020-10-30 10:25 ` [PATCH V8] GCOV: Add config to check the preqequisites situation Peter Oberparleiter
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