[IA64] Shrink shadow_flush_counts to a short array to save 8k of per_cpu area.

Making allmodconfig will break the current build. This patch shrinks
the per_cpu__shadow_flush_counts from 16k to 8k which frees enough space
to allow allmodconfig to successfully complete.

Fixes http://bugzilla.kernel.org/show_bug.cgi?id=11338

Signed-off-by: Robin Holt <[e-mail]>
Acked-by: Jack Steiner <[e-mail]>
Signed-off-by: Tony Luck <[e-mail]>

arch/ia64/kernel/smp.c

···
 	unsigned int count;
 } __attribute__((__aligned__(32))) local_tlb_flush_counts[NR_CPUS];
 
-static DEFINE_PER_CPU(unsigned int, shadow_flush_counts[NR_CPUS]) ____cacheline_aligned;
+static DEFINE_PER_CPU(unsigned short, shadow_flush_counts[NR_CPUS]) ____cacheline_aligned;
 
 #define IPI_CALL_FUNC		0
 #define IPI_CPU_STOP		1
···
 void
 smp_flush_tlb_cpumask(cpumask_t xcpumask)
 {
-	unsigned int *counts = __ia64_per_cpu_var(shadow_flush_counts);
+	unsigned short *counts = __ia64_per_cpu_var(shadow_flush_counts);
 	cpumask_t cpumask = xcpumask;
 	int mycpu, cpu, flush_mycpu = 0;
 
···
 	mycpu = smp_processor_id();
 
 	for_each_cpu_mask(cpu, cpumask)
-		counts[cpu] = local_tlb_flush_counts[cpu].count;
+		counts[cpu] = local_tlb_flush_counts[cpu].count & 0xffff;
 
 	mb();
 	for_each_cpu_mask(cpu, cpumask) {
···
 		smp_local_flush_tlb();
 
 	for_each_cpu_mask(cpu, cpumask)
-		while(counts[cpu] == local_tlb_flush_counts[cpu].count)
+		while(counts[cpu] == (local_tlb_flush_counts[cpu].count & 0xffff))
 			udelay(FLUSH_DELAY);
 
 	preempt_enable();