From b6278470b7cdbf2bf6ba7345130d83924451a51a Mon Sep 17 00:00:00 2001 From: Mike Travis Date: Fri, 19 Oct 2007 20:35:03 +0200 Subject: x86: convert cpu_llc_id to be a per cpu variable Convert cpu_llc_id from a static array sized by NR_CPUS to a per_cpu variable. This saves sizeof(cpu_llc_id) * NR unused cpus. Access is mostly from startup and CPU HOTPLUG functions. Note there's an additional change of the type of cpu_llc_id from int to u8 for ARCH i386 to correspond with the same type in ARCH x86_64. Signed-off-by: Mike Travis Cc: Andi Kleen Cc: Christoph Lameter Cc: "Siddha, Suresh B" Signed-off-by: Andrew Morton Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/cpu/intel_cacheinfo.c | 4 ++-- arch/x86/kernel/smpboot_32.c | 6 +++--- arch/x86/kernel/smpboot_64.c | 6 +++--- 3 files changed, 8 insertions(+), 8 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c index 297a24116949..35c7ebb57423 100644 --- a/arch/x86/kernel/cpu/intel_cacheinfo.c +++ b/arch/x86/kernel/cpu/intel_cacheinfo.c @@ -417,14 +417,14 @@ unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c) if (new_l2) { l2 = new_l2; #ifdef CONFIG_X86_HT - cpu_llc_id[cpu] = l2_id; + per_cpu(cpu_llc_id, cpu) = l2_id; #endif } if (new_l3) { l3 = new_l3; #ifdef CONFIG_X86_HT - cpu_llc_id[cpu] = l3_id; + per_cpu(cpu_llc_id, cpu) = l3_id; #endif } diff --git a/arch/x86/kernel/smpboot_32.c b/arch/x86/kernel/smpboot_32.c index 631be36ec2a9..47bccfc283d9 100644 --- a/arch/x86/kernel/smpboot_32.c +++ b/arch/x86/kernel/smpboot_32.c @@ -67,7 +67,7 @@ int smp_num_siblings = 1; EXPORT_SYMBOL(smp_num_siblings); /* Last level cache ID of each logical CPU */ -int cpu_llc_id[NR_CPUS] __cpuinitdata = {[0 ... NR_CPUS-1] = BAD_APICID}; +DEFINE_PER_CPU(u8, cpu_llc_id) = BAD_APICID; /* representing HT siblings of each logical CPU */ DEFINE_PER_CPU(cpumask_t, cpu_sibling_map); @@ -348,8 +348,8 @@ void __cpuinit set_cpu_sibling_map(int cpu) } for_each_cpu_mask(i, cpu_sibling_setup_map) { - if (cpu_llc_id[cpu] != BAD_APICID && - cpu_llc_id[cpu] == cpu_llc_id[i]) { + if (per_cpu(cpu_llc_id, cpu) != BAD_APICID && + per_cpu(cpu_llc_id, cpu) == per_cpu(cpu_llc_id, i)) { cpu_set(i, c[cpu].llc_shared_map); cpu_set(cpu, c[i].llc_shared_map); } diff --git a/arch/x86/kernel/smpboot_64.c b/arch/x86/kernel/smpboot_64.c index c3e8668c5278..7c8f58643186 100644 --- a/arch/x86/kernel/smpboot_64.c +++ b/arch/x86/kernel/smpboot_64.c @@ -65,7 +65,7 @@ int smp_num_siblings = 1; EXPORT_SYMBOL(smp_num_siblings); /* Last level cache ID of each logical CPU */ -u8 cpu_llc_id[NR_CPUS] __cpuinitdata = {[0 ... NR_CPUS-1] = BAD_APICID}; +DEFINE_PER_CPU(u8, cpu_llc_id) = BAD_APICID; /* Bitmask of currently online CPUs */ cpumask_t cpu_online_map __read_mostly; @@ -283,8 +283,8 @@ static inline void set_cpu_sibling_map(int cpu) } for_each_cpu_mask(i, cpu_sibling_setup_map) { - if (cpu_llc_id[cpu] != BAD_APICID && - cpu_llc_id[cpu] == cpu_llc_id[i]) { + if (per_cpu(cpu_llc_id, cpu) != BAD_APICID && + per_cpu(cpu_llc_id, cpu) == per_cpu(cpu_llc_id, i)) { cpu_set(i, c[cpu].llc_shared_map); cpu_set(cpu, c[i].llc_shared_map); } -- cgit v1.2.3-59-g8ed1b