devcoredump: Define 'struct bin_attribute' through macro

The macro saves some lines of code and simplifies the constification of
the attribute.

Signed-off-by: Thomas Weißschuh <[email protected]>
Link: https://lore.kernel.org/r/20250114-sysfs-const-bin_attr-devcoredump-v1-1-fa93be30efae@weissschuh.net
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: t-8ch

drivers/base/devcoredump.c

@@ -132,12 +132,8 @@ static ssize_t devcd_data_write(struct file *filp, struct kobject *kobj,
 	return count;
 }
 
-static struct bin_attribute devcd_attr_data = {
-	.attr = { .name = "data", .mode = S_IRUSR | S_IWUSR, },
-	.size = 0,
-	.read = devcd_data_read,
-	.write = devcd_data_write,
-};
+static struct bin_attribute devcd_attr_data =
+	__BIN_ATTR(data, 0600, devcd_data_read, devcd_data_write, 0);
 
 static struct bin_attribute *devcd_dev_bin_attrs[] = {
 	&devcd_attr_data, NULL,