[PATCH] s390: cio non-unique path group ids

From: Peter Oberparleiter <[e-mail]>

The path grouping can fail due to non-unique pathgroup-IDs. The source for
the CPU-ID part of the ID was incorrectly specified on 64 bit systems.
Additionally, the length of the ID was too large due to incorrect data packing
declaration. Fix CPU-ID lowcore address and add missing packing declaration.

Signed-off-by: Peter Oberparleiter <[e-mail]>
Signed-off-by: Martin Schwidefsky <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/s390/cio/css.h

···
 	union {
 		__u8 fc;   	/* SPID function code */
 		struct path_state ps;	/* SNID path state */
-	} inf;
+	} __attribute__ ((packed)) inf;
 	union {
 		__u32 cpu_addr	: 16;	/* CPU address */
 		struct extended_cssid ext_cssid;
-	} pgid_high;
+	} __attribute__ ((packed)) pgid_high;
 	__u32 cpu_id	: 24;	/* CPU identification */
 	__u32 cpu_model : 16;	/* CPU model */
 	__u32 tod_high;		/* high word TOD clock */

include/asm-s390/lowcore.h

···
 #define __LC_KERNEL_ASCE		0xD58
 #define __LC_USER_ASCE			0xD60
 #define __LC_PANIC_STACK                0xD68
-#define __LC_CPUID                      0xD90
-#define __LC_CPUADDR                    0xD98
+#define __LC_CPUID			0xD80
+#define __LC_CPUADDR			0xD88
 #define __LC_IPLDEV                     0xDB8
 #define __LC_JIFFY_TIMER		0xDC0
 #define __LC_CURRENT			0xDD8