[PATCH] fix PA-RISC fork_idle() sweep

Whether a brainfart or a mismerge, I inadvertently broke PA-RISC during
the fork_by_hand()/init_idle() consolidation.

The following patch repairs a compilebug/thinko pair, consisting of the
use of an undeclared variable cpunum, and not attempting fork_idle()
until after the check for IS_ERR(idle) reported by James Bottomley.
Signed-off-by: William Irwin <wli@holomorphy.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/parisc/kernel/smp.c

@@ -503,10 +503,10 @@ int __init smp_boot_one_cpu(int cpuid)
 	 * Sheesh . . .
 	 */
 
+	idle = fork_idle(cpuid);
 	if (IS_ERR(idle))
 		panic("SMP: fork failed for CPU:%d", cpuid);
 
-	idle = fork_idle(cpunum);
 	idle->thread_info->cpu = cpuid;
 
 	/* Let _start know what logical CPU we're booting