linux-kernel - [RFC PATCH 5/5] Add kconf_symb as kernel module attribute

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Date:	Wed, 17 Aug 2016 21:27:03 +0200
From:	Cristina Moraru <cristina.moraru09@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	mcgrof@...nel.org, teg@...m.no, kay@...y.org,
	rusty@...tcorp.com.au, akpm@...ux-foundation.org,
	Cristina Moraru <cristina.moraru09@...il.com>
Subject: [RFC PATCH 5/5] Add kconf_symb as kernel module attribute

Add kconf_symbol attribute to kernel struct module.

This patch is part of a research project within
Google Summer of Code of porting 'make localmodconfig'
for backported drivers. The goal is to enable each
module to expose in /sys its corresponding CONFIG_* option.
The value of this attribute will be dynamically pegged by
modpost without requiring extra work from the driver developers.
Further, this information will be used by a hardware interogation
tool to extract build information about the existing devices.

Signed-off-by: Cristina Moraru <cristina.moraru09@...il.com>
---
 include/linux/module.h | 1 +
 kernel/module.c        | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/include/linux/module.h b/include/linux/module.h
index 3daf2b3..bef5e44 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -353,6 +353,7 @@ struct module {
 	struct module_attribute *modinfo_attrs;
 	const char *version;
 	const char *srcversion;
+	const char *kconfig_symbol;
 	struct kobject *holders_dir;
 
 	/* Exported symbols */
diff --git a/kernel/module.c b/kernel/module.c
index 5f71aa6..bb27300 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -757,6 +757,7 @@ static struct module_attribute modinfo_##field = {                    \
 
 MODINFO_ATTR(version);
 MODINFO_ATTR(srcversion);
+MODINFO_ATTR(kconfig_symbol);
 
 static char last_unloaded_module[MODULE_NAME_LEN+1];
 
@@ -1229,6 +1230,7 @@ static struct module_attribute *modinfo_attrs[] = {
 	&module_uevent,
 	&modinfo_version,
 	&modinfo_srcversion,
+	&modinfo_kconfig_symbol,
 	&modinfo_initstate,
 	&modinfo_coresize,
 	&modinfo_initsize,
-- 
2.7.4