Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Remove stale pmtimer_64.c
  x86, cleanups: Use clear_page/copy_page rather than memset/memcpy
  x86: Remove unnecessary #ifdef ACPI/X86_IO_ACPI
  x86, cleanup: Remove obsolete boot_cpu_id variable

19 files changed, 21 insertions, 99 deletions

diff --git a/arch/x86/include/asm/apb_timer.h b/arch/x86/include/asm/apb_timer.h
index a69b1ac9eaf..2fefa501d3b 100644
--- a/arch/x86/include/asm/apb_timer.h
+++ b/arch/x86/include/asm/apb_timer.h
@@ -54,7 +54,6 @@ extern struct clock_event_device *global_clock_event;
 extern unsigned long apbt_quick_calibrate(void);
 extern int arch_setup_apbt_irqs(int irq, int trigger, int mask, int cpu);
 extern void apbt_setup_secondary_clock(void);
-extern unsigned int boot_cpu_id;
 
 extern struct sfi_timer_table_entry *sfi_get_mtmr(int hint);
 extern void sfi_free_mtmr(struct sfi_timer_table_entry *mtmr);
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h
index b185091bf19..4fab24de26b 100644
--- a/arch/x86/include/asm/cpu.h
+++ b/arch/x86/include/asm/cpu.h
@@ -32,6 +32,5 @@ extern void arch_unregister_cpu(int);
 
 DECLARE_PER_CPU(int, cpu_state);
 
-extern unsigned int boot_cpu_id;
 
 #endif /* _ASM_X86_CPU_H */
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 81f37703379..f49257e3380 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -123,7 +123,6 @@ obj-$(CONFIG_SWIOTLB)			+= pci-swiotlb.o
 # 64 bit specific files
 ifeq ($(CONFIG_X86_64),y)
         obj-$(CONFIG_X86_UV)            += tlb_uv.o bios_uv.o uv_irq.o uv_sysfs.o uv_time.o
-        obj-$(CONFIG_X86_PM_TIMER)      += pmtimer_64.o
         obj-$(CONFIG_AUDIT)             += audit_64.o
 
         obj-$(CONFIG_GART_IOMMU)        += pci-gart_64.o aperture_64.o
diff --git a/arch/x86/kernel/apb_timer.c b/arch/x86/kernel/apb_timer.c
index 8dd77800ff5..08f75fb4f50 100644
--- a/arch/x86/kernel/apb_timer.c
+++ b/arch/x86/kernel/apb_timer.c
@@ -343,7 +343,7 @@ void apbt_setup_secondary_clock(void)
 
         /* Don't register boot CPU clockevent */
         cpu = smp_processor_id();
-        if (cpu == boot_cpu_id)
+        if (!cpu)
                 return;
         /*
          * We need to calculate the scaled math multiplication factor for
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 5c5b8f3dddb..f1e78940d90 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -162,7 +162,7 @@ int __init arch_early_irq_init(void)
 
         cfg = irq_cfgx;
         count = ARRAY_SIZE(irq_cfgx);
-        node= cpu_to_node(boot_cpu_id);
+        node = cpu_to_node(0);
 
         for (i = 0; i < count; i++) {
                 desc = irq_to_desc(i);
@@ -1488,7 +1488,7 @@ static void __init setup_IO_APIC_irqs(void)
         int notcon = 0;
         struct irq_desc *desc;
         struct irq_cfg *cfg;
-        int node = cpu_to_node(boot_cpu_id);
+        int node = cpu_to_node(0);
 
         apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
 
@@ -1553,7 +1553,7 @@ static void __init setup_IO_APIC_irqs(void)
 void setup_IO_APIC_irq_extra(u32 gsi)
 {
         int apic_id = 0, pin, idx, irq;
-        int node = cpu_to_node(boot_cpu_id);
+        int node = cpu_to_node(0);
         struct irq_desc *desc;
         struct irq_cfg *cfg;
 
@@ -2932,7 +2932,7 @@ static inline void __init check_timer(void)
 {
         struct irq_desc *desc = irq_to_desc(0);
         struct irq_cfg *cfg = desc->chip_data;
-        int node = cpu_to_node(boot_cpu_id);
+        int node = cpu_to_node(0);
         int apic1, pin1, apic2, pin2;
         unsigned long flags;
         int no_pin1 = 0;
@@ -3286,7 +3286,7 @@ unsigned int create_irq_nr(unsigned int irq_want, int node)
 
 int create_irq(void)
 {
-        int node = cpu_to_node(boot_cpu_id);
+        int node = cpu_to_node(0);
         unsigned int irq_want;
         int irq;
 
@@ -3908,7 +3908,7 @@ static int __io_apic_set_pci_routing(struct device *dev, int irq,
         if (dev)
                 node = dev_to_node(dev);
         else
-                node = cpu_to_node(boot_cpu_id);
+                node = cpu_to_node(0);
 
         desc = irq_to_desc_alloc_node(irq, node);
         if (!desc) {
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 70168ab88b7..9e093f8fe78 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -148,7 +148,7 @@ static void __cpuinit amd_k7_smp_check(struct cpuinfo_x86 *c)
 {
 #ifdef CONFIG_SMP
         /* calling is from identify_secondary_cpu() ? */
-        if (c->cpu_index == boot_cpu_id)
+        if (!c->cpu_index)
                 return;
 
         /*
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index f2f9ac7da25..15c671385f5 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -665,7 +665,7 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
                 this_cpu->c_early_init(c);
 
 #ifdef CONFIG_SMP
-        c->cpu_index = boot_cpu_id;
+        c->cpu_index = 0;
 #endif
         filter_cpuid_features(c, false);
 }
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index b4389441efb..695f17731e2 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -170,7 +170,7 @@ static void __cpuinit intel_smp_check(struct cpuinfo_x86 *c)
 {
 #ifdef CONFIG_SMP
         /* calling is from identify_secondary_cpu() ? */
-        if (c->cpu_index == boot_cpu_id)
+        if (!c->cpu_index)
                 return;
 
         /*
diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index ebdb85cf268..76b8cd953de 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -97,7 +97,6 @@ static void __init nvidia_bugs(int num, int slot, int func)
 }
 
 #if defined(CONFIG_ACPI) && defined(CONFIG_X86_IO_APIC)
-#if defined(CONFIG_ACPI) && defined(CONFIG_X86_IO_APIC)
 static u32 __init ati_ixp4x0_rev(int num, int slot, int func)
 {
         u32 d;
@@ -115,7 +114,6 @@ static u32 __init ati_ixp4x0_rev(int num, int slot, int func)
         d &= 0xff;
         return d;
 }
-#endif
 
 static void __init ati_bugs(int num, int slot, int func)
 {
diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index 035c8c52918..b3ea9db39db 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -36,7 +36,7 @@ static int init_one_level2_page(struct kimage *image, pgd_t *pgd,
                 if (!page)
                         goto out;
                 pud = (pud_t *)page_address(page);
-                memset(pud, 0, PAGE_SIZE);
+                clear_page(pud);
                 set_pgd(pgd, __pgd(__pa(pud) | _KERNPG_TABLE));
         }
         pud = pud_offset(pgd, addr);
@@ -45,7 +45,7 @@ static int init_one_level2_page(struct kimage *image, pgd_t *pgd,
                 if (!page)
                         goto out;
                 pmd = (pmd_t *)page_address(page);
-                memset(pmd, 0, PAGE_SIZE);
+                clear_page(pmd);
                 set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE));
         }
         pmd = pmd_offset(pud, addr);
diff --git a/arch/x86/kernel/pmtimer_64.c b/arch/x86/kernel/pmtimer_64.c
deleted file mode 100644
index b112406f199..00000000000
--- a/arch/x86/kernel/pmtimer_64.c
+++ /dev/null
@@ -1,69 +0,0 @@
-/* Ported over from i386 by AK, original copyright was:
- *
- * (C) Dominik Brodowski <linux@brodo.de> 2003
- *
- * Driver to use the Power Management Timer (PMTMR) available in some
- * southbridges as primary timing source for the Linux kernel.
- *
- * Based on parts of linux/drivers/acpi/hardware/hwtimer.c, timer_pit.c,
- * timer_hpet.c, and on Arjan van de Ven's implementation for 2.4.
- *
- * This file is licensed under the GPL v2.
- *
- * Dropped all the hardware bug workarounds for now. Hopefully they
- * are not needed on 64bit chipsets.
- */
-
-#include <linux/jiffies.h>
-#include <linux/kernel.h>
-#include <linux/time.h>
-#include <linux/init.h>
-#include <linux/cpumask.h>
-#include <linux/acpi_pmtmr.h>
-
-#include <asm/io.h>
-#include <asm/proto.h>
-#include <asm/msr.h>
-#include <asm/vsyscall.h>
-
-static inline u32 cyc2us(u32 cycles)
-{
-        /* The Power Management Timer ticks at 3.579545 ticks per microsecond.
-         * 1 / PM_TIMER_FREQUENCY == 0.27936511 =~ 286/1024 [error: 0.024%]
-         *
-         * Even with HZ = 100, delta is at maximum 35796 ticks, so it can
-         * easily be multiplied with 286 (=0x11E) without having to fear
-         * u32 overflows.
-         */
-        cycles *= 286;
-        return (cycles >> 10);
-}
-
-static unsigned pmtimer_wait_tick(void)
-{
-        u32 a, b;
-        for (a = b = inl(pmtmr_ioport) & ACPI_PM_MASK;
-             a == b;
-             b = inl(pmtmr_ioport) & ACPI_PM_MASK)
-                cpu_relax();
-        return b;
-}
-
-/* note: wait time is rounded up to one tick */
-void pmtimer_wait(unsigned us)
-{
-        u32 a, b;
-        a = pmtimer_wait_tick();
-        do {
-                b = inl(pmtmr_ioport);
-                cpu_relax();
-        } while (cyc2us(b - a) < us);
-}
-
-static int __init nopmtimer_setup(char *s)
-{
-        pmtmr_ioport = 0;
-        return 1;
-}
-
-__setup("nopmtimer", nopmtimer_setup);
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index e3af342fe83..7a4cf14223b 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -84,7 +84,7 @@ static int __init reboot_setup(char *str)
                         }
                                 /* we will leave sorting out the final value
                                    when we are ready to reboot, since we might not
-                                   have set up boot_cpu_id or smp_num_cpu */
+                                   have detected BSP APIC ID or smp_num_cpu */
                         break;
 #endif /* CONFIG_SMP */
 
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 6154701a5fd..9e5cdaf73b4 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -126,7 +126,6 @@ unsigned long max_pfn_mapped;
 RESERVE_BRK(dmi_alloc, 65536);
 #endif
 
-unsigned int boot_cpu_id __read_mostly;
 
 static __initdata unsigned long _brk_start = (unsigned long)__brk_base;
 unsigned long _brk_end = (unsigned long)__brk_base;
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index a60df9ae645..2335c15c93a 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -253,7 +253,7 @@ void __init setup_per_cpu_areas(void)
                  * Up to this point, the boot CPU has been using .init.data
                  * area.  Reload any changed state for the boot CPU.
                  */
-                if (cpu == boot_cpu_id)
+                if (!cpu)
                         switch_to_new_gdt(cpu);
         }
 
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 77d8c0f4817..22b06f7660f 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1056,14 +1056,13 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu)
 
         vcpu->arch.apic = apic;
 
-        apic->regs_page = alloc_page(GFP_KERNEL);
+        apic->regs_page = alloc_page(GFP_KERNEL|__GFP_ZERO);
         if (apic->regs_page == NULL) {
                 printk(KERN_ERR "malloc apic regs error for vcpu %x\n",
                        vcpu->vcpu_id);
                 goto nomem_free_apic;
         }
         apic->regs = page_address(apic->regs_page);
-        memset(apic->regs, 0, PAGE_SIZE);
         apic->vcpu = vcpu;
 
         hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC,
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index bca79091b9d..558f2d33207 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -67,7 +67,7 @@ static __init void *alloc_low_page(void)
                 panic("alloc_low_page: ran out of memory");
 
         adr = __va(pfn * PAGE_SIZE);
-        memset(adr, 0, PAGE_SIZE);
+        clear_page(adr);
         return adr;
 }
 
@@ -558,7 +558,7 @@ char swsusp_pg_dir[PAGE_SIZE]
 
 static inline void save_pg_dir(void)
 {
-        memcpy(swsusp_pg_dir, swapper_pg_dir, PAGE_SIZE);
+        copy_page(swsusp_pg_dir, swapper_pg_dir);
 }
 #else /* !CONFIG_ACPI_SLEEP */
 static inline void save_pg_dir(void)
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 9a6674689a2..7c48ad4faca 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -293,7 +293,7 @@ static __ref void *alloc_low_page(unsigned long *phys)
                 panic("alloc_low_page: ran out of memory");
 
         adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE);
-        memset(adr, 0, PAGE_SIZE);
+        clear_page(adr);
         *phys  = pfn * PAGE_SIZE;
         return adr;
 }
diff --git a/arch/x86/mm/k8topology_64.c b/arch/x86/mm/k8topology_64.c
index ab75b181812..52d54bfc1eb 100644
--- a/arch/x86/mm/k8topology_64.c
+++ b/arch/x86/mm/k8topology_64.c
@@ -54,8 +54,8 @@ static __init int find_northbridge(void)
 static __init void early_get_boot_cpu_id(void)
 {
         /*
-         * need to get boot_cpu_id so can use that to create apicid_to_node
-         * in k8_scan_nodes()
+         * need to get the APIC ID of the BSP so can use that to
+         * create apicid_to_node in k8_scan_nodes()
          */
 #ifdef CONFIG_X86_MPPARSE
         /*
@@ -212,7 +212,7 @@ int __init k8_scan_nodes(void)
         bits = boot_cpu_data.x86_coreid_bits;
         cores = (1<<bits);
         apicid_base = 0;
-        /* need to get boot_cpu_id early for system with apicid lifting */
+        /* get the APIC ID of the BSP early for systems with apicid lifting */
         early_get_boot_cpu_id();
         if (boot_cpu_physical_apicid > 0) {
                 pr_info("BSP APIC ID: %02x\n", boot_cpu_physical_apicid);
diff --git a/include/linux/acpi_pmtmr.h b/include/linux/acpi_pmtmr.h
index 7e3d2859be5..1d0ef1ae803 100644
--- a/include/linux/acpi_pmtmr.h
+++ b/include/linux/acpi_pmtmr.h
@@ -25,8 +25,6 @@ static inline u32 acpi_pm_read_early(void)
         return acpi_pm_read_verified() & ACPI_PM_MASK;
 }
 
-extern void pmtimer_wait(unsigned);
-
 #else
 
 static inline u32 acpi_pm_read_early(void)