[PATCH] ppc64: show -1 for physical_id of non-present cpus

Make the physical_id cpu sysfs attribute on ppc64 show -1 instead of
65535 for non-present cpus.
Signed-off-by: Nathan Lynch <nathanl@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc64/kernel/sysfs.c

@@ -387,7 +387,7 @@ static ssize_t show_physical_id(struct sys_device *dev, char *buf)
 {
 	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
 
-	return sprintf(buf, "%u\n", get_hard_smp_processor_id(cpu->sysdev.id));
+	return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
 }
 static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
 

include/asm-ppc64/paca.h

@@ -68,7 +68,7 @@ struct paca_struct {
 	u64 stab_real;			/* Absolute address of segment table */
 	u64 stab_addr;			/* Virtual address of segment table */
 	void *emergency_sp;		/* pointer to emergency stack */
-	u16 hw_cpu_id;			/* Physical processor number */
+	s16 hw_cpu_id;			/* Physical processor number */
 	u8 cpu_start;			/* At startup, processor spins until */
 					/* this becomes non-zero. */