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

Cristina Moraru
2016-08-17T19:28:10Z

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@gmail.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