[PATCH 26/75] dmi-id: Use dynamic sysfs attributes

Greg Kroah-Hartman
2007-10-12T22:32:54Z

From: Jean Delvare <khali@linux-fr.org>

We can use sysfs attributes with an extra parameter for dmi id
attributes. This makes it possible to use the same callback function
for all attributes, reducing the binary size significantly (-18% on
x86_64.)

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Lennart Poettering <mzxreary@0pointer.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/firmware/dmi-id.c | 38 ++++++++++++++++++++++++++------------
1 files changed, 26 insertions(+), 12 deletions(-)

diff --git a/drivers/firmware/dmi-id.c b/drivers/firmware/dmi-id.c
index 2678098..a7bd87d 100644
--- a/drivers/firmware/dmi-id.c
+++ b/drivers/firmware/dmi-id.c
@@ -13,21 +13,35 @@
#include <linux/device.h>
#include <linux/autoconf.h>

+struct dmi_device_attribute{
+ struct device_attribute dev_attr;
+ int field;
+};
+#define to_dmi_dev_attr(_dev_attr) \
+ container_of(_dev_attr, struct dmi_device_attribute, dev_attr)
+
#define DEFINE_DMI_ATTR(_name, _mode, _show) \
static struct device_attribute sys_dmi_##_name##_attr = \
__ATTR(_name, _mode, _show, NULL);

-#define DEFINE_DMI_ATTR_WITH_SHOW(_name, _mode, _field) \
-static ssize_t sys_dmi_##_name##_show(struct device *dev, \
- struct device_attribute *attr, \
- char *page) \
-{ \
- ssize_t len; \
- len = scnprintf(page, PAGE_SIZE, "%s\n", dmi_get_system_info(_field)); \
- page[len-1] = '\n'; \
- return len; \
-} \
-DEFINE_DMI_ATTR(_name, _mode, sys_dmi_##_name##_show);
+static ssize_t sys_dmi_field_show(struct device *dev,
+ struct device_attribute *attr,
+ char *page)
+{
+ int field = to_dmi_dev_attr(attr)->field;
+ ssize_t len;
+ len = scnprintf(page, PAGE_SIZE, "%s\n", dmi_get_system_info(field));
+ page[len-1] = '\n';
+ return len;
+}
+
+#define DMI_ATTR(_name, _mode, _show, _field) \
+ { .dev_attr = __ATTR(_name, _mode, _show, NULL), \
+ .field = _field }
+
+#define DEFINE_DMI_ATTR_WITH_SHOW(_name, _mode, _field) \
+static struct dmi_device_attribute sys_dmi_##_name##_attr = \
+ DMI_ATTR(_name, _mode, sys_dmi_field_show, _field);

DEFINE_DMI_ATTR_WITH_SHOW(bios_vendor, 0444, DMI_BIOS_VENDOR);
DEFINE_DMI_ATTR_WITH_SHOW(bios_version, 0444, DMI_BIOS_VERSION);
@@ -160,7 +174,7 @@ static struct device *dmi_dev;

#define ADD_DMI_ATTR(_name, _field) \
if (dmi_get_system_info(_field)) \
- sys_dmi_attributes[i++] = & sys_dmi_##_name##_attr.attr;
+ sys_dmi_attributes[i++] = &sys_dmi_##_name##_attr.dev_attr.attr;

extern int dmi_available;

--
1.5.3.4