Fix container_of() usage

Using "attr" twice is not OK, because it effectively prohibits such
container_of() on variables not named "attr".
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/sh/kernel/cpu/sh4/sq.c

@@ -263,7 +263,7 @@ struct sq_sysfs_attr {
 	ssize_t (*store)(const char *buf, size_t count);
 };
 
-#define to_sq_sysfs_attr(attr)	container_of(attr, struct sq_sysfs_attr, attr)
+#define to_sq_sysfs_attr(a)	container_of(a, struct sq_sysfs_attr, attr)
 
 static ssize_t sq_sysfs_show(struct kobject *kobj, struct attribute *attr,
 			     char *buf)

drivers/lguest/lguest_device.c

@@ -47,7 +47,7 @@ struct lguest_device {
 /* Since the virtio infrastructure hands us a pointer to the virtio_device all
  * the time, it helps to have a curt macro to get a pointer to the struct
  * lguest_device it's enclosed in.  */
-#define to_lgdev(vdev) container_of(vdev, struct lguest_device, vdev)
+#define to_lgdev(vd) container_of(vd, struct lguest_device, vdev)
 
 /*D:130
  * Device configurations