x86_64: remove now unused code

Remove the unused code after the switch to clock events.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>

arch/x86/kernel/Makefile_32

@@ -7,7 +7,7 @@ extra-y := head_32.o init_task_32.o vmlinux.lds
 obj-y	:= process_32.o signal_32.o entry_32.o traps_32.o irq_32.o \
 		ptrace_32.o time_32.o ioport_32.o ldt_32.o setup_32.o i8259_32.o sys_i386_32.o \
 		pci-dma_32.o i386_ksyms_32.o i387_32.o bootflag.o e820_32.o\
-		quirks.o i8237.o topology.o alternative.o i8253_32.o tsc_32.o
+		quirks.o i8237.o topology.o alternative.o i8253.o tsc_32.o
 
 obj-$(CONFIG_STACKTRACE)	+= stacktrace.o
 obj-y				+= cpu/
@@ -37,7 +37,7 @@ obj-$(CONFIG_EFI) 		+= efi_32.o efi_stub_32.o
 obj-$(CONFIG_DOUBLEFAULT) 	+= doublefault_32.o
 obj-$(CONFIG_VM86)		+= vm86_32.o
 obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
-obj-$(CONFIG_HPET_TIMER) 	+= hpet_32.o
+obj-$(CONFIG_HPET_TIMER) 	+= hpet.o
 obj-$(CONFIG_K8_NB)		+= k8.o
 obj-$(CONFIG_MGEODE_LX)		+= geode_32.o mfgpt_32.o
 

arch/x86/kernel/Makefile_64

@@ -8,8 +8,8 @@ obj-y	:= process_64.o signal_64.o entry_64.o traps_64.o irq_64.o \
 		ptrace_64.o time_64.o ioport_64.o ldt_64.o setup_64.o i8259_64.o sys_x86_64.o \
 		x8664_ksyms_64.o i387_64.o syscall_64.o vsyscall_64.o \
 		setup64.o bootflag.o e820_64.o reboot_64.o quirks.o i8237.o \
-		pci-dma_64.o pci-nommu_64.o alternative.o hpet_32.o tsc_64.o bugs_64.o \
-		perfctr-watchdog.o i8253_32.o
+		pci-dma_64.o pci-nommu_64.o alternative.o hpet.o tsc_64.o bugs_64.o \
+		perfctr-watchdog.o i8253.o
 
 obj-$(CONFIG_STACKTRACE)	+= stacktrace.o
 obj-$(CONFIG_X86_MCE)		+= mce_64.o therm_throt.o

arch/x86/kernel/apic_64.c

@@ -41,7 +41,6 @@
 #include <asm/apic.h>
 
 int apic_verbosity;
-int apic_runs_main_timer;
 int apic_calibrate_pmtmr __initdata;
 
 int disable_apic_timer __cpuinitdata;
@@ -129,15 +128,6 @@ static void lapic_timer_broadcast(cpumask_t mask)
 #endif
 }
 
-/*
- * cpu_mask that denotes the CPUs that needs timer interrupt coming in as
- * IPIs in place of local APIC timers
- */
-static cpumask_t timer_interrupt_broadcast_ipi_mask;
-
-/* Using APIC to generate smp_local_timer_interrupt? */
-int using_apic_timer __read_mostly = 0;
-
 static void apic_pm_activate(void);
 
 void apic_wait_icr_idle(void)
@@ -973,84 +963,6 @@ void __cpuinit setup_secondary_APIC_clock(void)
 	setup_APIC_timer();
 }
 
-void disable_APIC_timer(void)
-{
-	if (using_apic_timer) {
-		unsigned long v;
-
-		v = apic_read(APIC_LVTT);
-		/*
-		 * When an illegal vector value (0-15) is written to an LVT
-		 * entry and delivery mode is Fixed, the APIC may signal an
-		 * illegal vector error, with out regard to whether the mask
-		 * bit is set or whether an interrupt is actually seen on input.
-		 *
-		 * Boot sequence might call this function when the LVTT has
-		 * '0' vector value. So make sure vector field is set to
-		 * valid value.
-		 */
-		v |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR);
-		apic_write(APIC_LVTT, v);
-	}
-}
-
-void enable_APIC_timer(void)
-{
-	int cpu = smp_processor_id();
-
-	if (using_apic_timer &&
-	    !cpu_isset(cpu, timer_interrupt_broadcast_ipi_mask)) {
-		unsigned long v;
-
-		v = apic_read(APIC_LVTT);
-		apic_write(APIC_LVTT, v & ~APIC_LVT_MASKED);
-	}
-}
-
-void switch_APIC_timer_to_ipi(void *cpumask)
-{
-	cpumask_t mask = *(cpumask_t *)cpumask;
-	int cpu = smp_processor_id();
-
-	if (cpu_isset(cpu, mask) &&
-	    !cpu_isset(cpu, timer_interrupt_broadcast_ipi_mask)) {
-		disable_APIC_timer();
-		cpu_set(cpu, timer_interrupt_broadcast_ipi_mask);
-	}
-}
-EXPORT_SYMBOL(switch_APIC_timer_to_ipi);
-
-void smp_send_timer_broadcast_ipi(void)
-{
-	int cpu = smp_processor_id();
-	cpumask_t mask;
-
-	cpus_and(mask, cpu_online_map, timer_interrupt_broadcast_ipi_mask);
-
-	if (cpu_isset(cpu, mask)) {
-		cpu_clear(cpu, mask);
-		add_pda(apic_timer_irqs, 1);
-		smp_local_timer_interrupt();
-	}
-
-	if (!cpus_empty(mask)) {
-		send_IPI_mask(mask, LOCAL_TIMER_VECTOR);
-	}
-}
-
-void switch_ipi_to_APIC_timer(void *cpumask)
-{
-	cpumask_t mask = *(cpumask_t *)cpumask;
-	int cpu = smp_processor_id();
-
-	if (cpu_isset(cpu, mask) &&
-	    cpu_isset(cpu, timer_interrupt_broadcast_ipi_mask)) {
-		cpu_clear(cpu, timer_interrupt_broadcast_ipi_mask);
-		enable_APIC_timer();
-	}
-}
-EXPORT_SYMBOL(switch_ipi_to_APIC_timer);
-
 int setup_profiling_timer(unsigned int multiplier)
 {
 	return -EINVAL;
@@ -1297,21 +1209,7 @@ static __init int setup_noapictimer(char *str)
 	disable_apic_timer = 1;
 	return 1;
 }
-
-static __init int setup_apicmaintimer(char *str)
-{
-	apic_runs_main_timer = 1;
-
-	return 1;
-}
-__setup("apicmaintimer", setup_apicmaintimer);
-
-static __init int setup_noapicmaintimer(char *str)
-{
-	apic_runs_main_timer = -1;
-	return 1;
-}
-__setup("noapicmaintimer", setup_noapicmaintimer);
+__setup("noapictimer", setup_noapictimer);
 
 static __init int setup_apicpmtimer(char *s)
 {
@@ -1321,5 +1219,3 @@ static __init int setup_apicpmtimer(char *s)
 }
 __setup("apicpmtimer", setup_apicpmtimer);
 
-__setup("noapictimer", setup_noapictimer);
-

arch/x86/kernel/time_64.c

@@ -150,48 +150,6 @@ int update_persistent_clock(struct timespec now)
 	return set_rtc_mmss(now.tv_sec);
 }
 
-void main_timer_handler(void)
-{
-/*
- * Here we are in the timer irq handler. We have irqs locally disabled (so we
- * don't need spin_lock_irqsave()) but we don't know if the timer_bh is running
- * on the other CPU, so we need a lock. We also need to lock the vsyscall
- * variables, because both do_timer() and us change them -arca+vojtech
- */
-
-	write_seqlock(&xtime_lock);
-
-/*
- * Do the timer stuff.
- */
-
-	do_timer(1);
-#ifndef CONFIG_SMP
-	update_process_times(user_mode(get_irq_regs()));
-#endif
-
-/*
- * In the SMP case we use the local APIC timer interrupt to do the profiling,
- * except when we simulate SMP mode on a uniprocessor system, in that case we
- * have to call the local interrupt handler.
- */
-
-	if (!using_apic_timer)
-		smp_local_timer_interrupt();
-
-	write_sequnlock(&xtime_lock);
-}
-
-static irqreturn_t timer_interrupt(int irq, void *dev_id)
-{
-	if (apic_runs_main_timer > 1)
-		return IRQ_HANDLED;
-	main_timer_handler();
-	if (using_apic_timer)
-		smp_send_timer_broadcast_ipi();
-	return IRQ_HANDLED;
-}
-
 static irqreturn_t timer_event_interrupt(int irq, void *dev_id)
 {
 	add_pda(irq0_irqs, 1);

include/asm-x86/apic_64.h

@@ -79,8 +79,6 @@ extern void smp_local_timer_interrupt (void);
 extern void setup_boot_APIC_clock (void);
 extern void setup_secondary_APIC_clock (void);
 extern int APIC_init_uniprocessor (void);
-extern void disable_APIC_timer(void);
-extern void enable_APIC_timer(void);
 extern void setup_apic_routing(void);
 
 extern void setup_APIC_extended_lvt(unsigned char lvt_off, unsigned char vector,
@@ -95,10 +93,6 @@ extern int apic_is_clustered_box(void);
 #define K8_APIC_EXT_INT_MSG_EXT 0x7
 #define K8_APIC_EXT_LVT_ENTRY_THRESHOLD    0
 
-void smp_send_timer_broadcast_ipi(void);
-void switch_APIC_timer_to_ipi(void *cpumask);
-void switch_ipi_to_APIC_timer(void *cpumask);
-
 #define ARCH_APICTIMER_STOPS_ON_C3	1
 
 extern unsigned boot_cpu_id;

include/asm-x86/proto.h

@@ -51,9 +51,6 @@ extern void reserve_bootmem_generic(unsigned long phys, unsigned len);
 
 extern void load_gs_index(unsigned gs);
 
-extern void stop_timer_interrupt(void);
-extern void main_timer_handler(void);
-
 extern unsigned long end_pfn_map; 
 
 extern void show_trace(struct task_struct *, struct pt_regs *, unsigned long * rsp);
@@ -90,14 +87,10 @@ extern int timer_over_8254;
 
 extern int gsi_irq_sharing(int gsi);
 
-extern void smp_local_timer_interrupt(void);
-
 extern int force_mwait;
 
 long do_arch_prctl(struct task_struct *task, int code, unsigned long addr);
 
-void i8254_timer_resume(void);
-
 #define round_up(x,y) (((x) + (y) - 1) & ~((y)-1))
 #define round_down(x,y) ((x) & ~((y)-1))