From: Robin Holt <holt@sgi.com>
Date: Fri, 15 Aug 2008 14:21:24 +0000 (-0500)
Subject: [IA64] Shrink shadow_flush_counts to a short array to save 8k of per_cpu area.
X-Git-Tag: v2.6.27-rc4~40^2~2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=97653f92c004d322ef27edb168a1b5f31142c6dc;p=linux-2.6

[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 <holt@sgi.com>
Acked-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---

diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 3676468612..da8f020d82 100644
--- a/arch/ia64/kernel/smp.c
+++ b/arch/ia64/kernel/smp.c
@@ -58,7 +58,7 @@ static struct local_tlb_flush_counts {
 	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
@@ -254,7 +254,7 @@ smp_local_flush_tlb(void)
 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;
 
@@ -262,7 +262,7 @@ smp_flush_tlb_cpumask(cpumask_t xcpumask)
 	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) {
@@ -276,7 +276,7 @@ smp_flush_tlb_cpumask(cpumask_t xcpumask)
 		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();