Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b352b7fe2271c48600a71f50546b8a3567a0e7fe
Commit:     b352b7fe2271c48600a71f50546b8a3567a0e7fe
Parent:     8260dc37916c12b36e9732a8fa5bfa8c5fa8f0c4
Author:     Thomas Gleixner <[EMAIL PROTECTED]>
AuthorDate: Thu Oct 11 11:12:54 2007 +0200
Committer:  Thomas Gleixner <[EMAIL PROTECTED]>
CommitDate: Thu Oct 11 11:12:54 2007 +0200

    i386: prepare shared kernel/irq.c
    
    Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
    Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
---
 arch/i386/kernel/Makefile |    2 +-
 arch/i386/kernel/irq.c    |  343 ---------------------------------------------
 arch/i386/kernel/irq_32.c |  343 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 344 insertions(+), 344 deletions(-)

diff --git a/arch/i386/kernel/Makefile b/arch/i386/kernel/Makefile
index b3a8c9a..c718afe 100644
--- a/arch/i386/kernel/Makefile
+++ b/arch/i386/kernel/Makefile
@@ -4,7 +4,7 @@
 
 extra-y := head.o init_task.o vmlinux.lds
 
-obj-y  := process.o signal_32.o entry.o traps_32.o irq.o \
+obj-y  := process.o signal_32.o entry.o traps_32.o irq_32.o \
                ptrace_32.o time_32.o ioport_32.o ldt.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.o
diff --git a/arch/i386/kernel/irq.c b/arch/i386/kernel/irq.c
deleted file mode 100644
index dd2b97f..0000000
--- a/arch/i386/kernel/irq.c
+++ /dev/null
@@ -1,343 +0,0 @@
-/*
- *     linux/arch/i386/kernel/irq.c
- *
- *     Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
- *
- * This file contains the lowest level x86-specific interrupt
- * entry, irq-stacks and irq statistics code. All the remaining
- * irq logic is done by the generic kernel/irq/ code and
- * by the x86-specific irq controller code. (e.g. i8259.c and
- * io_apic.c.)
- */
-
-#include <linux/module.h>
-#include <linux/seq_file.h>
-#include <linux/interrupt.h>
-#include <linux/kernel_stat.h>
-#include <linux/notifier.h>
-#include <linux/cpu.h>
-#include <linux/delay.h>
-
-#include <asm/apic.h>
-#include <asm/uaccess.h>
-
-DEFINE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
-EXPORT_PER_CPU_SYMBOL(irq_stat);
-
-DEFINE_PER_CPU(struct pt_regs *, irq_regs);
-EXPORT_PER_CPU_SYMBOL(irq_regs);
-
-/*
- * 'what should we do if we get a hw irq event on an illegal vector'.
- * each architecture has to answer this themselves.
- */
-void ack_bad_irq(unsigned int irq)
-{
-       printk(KERN_ERR "unexpected IRQ trap at vector %02x\n", irq);
-
-#ifdef CONFIG_X86_LOCAL_APIC
-       /*
-        * Currently unexpected vectors happen only on SMP and APIC.
-        * We _must_ ack these because every local APIC has only N
-        * irq slots per priority level, and a 'hanging, unacked' IRQ
-        * holds up an irq slot - in excessive cases (when multiple
-        * unexpected vectors occur) that might lock up the APIC
-        * completely.
-        * But only ack when the APIC is enabled -AK
-        */
-       if (cpu_has_apic)
-               ack_APIC_irq();
-#endif
-}
-
-#ifdef CONFIG_4KSTACKS
-/*
- * per-CPU IRQ handling contexts (thread information and stack)
- */
-union irq_ctx {
-       struct thread_info      tinfo;
-       u32                     stack[THREAD_SIZE/sizeof(u32)];
-};
-
-static union irq_ctx *hardirq_ctx[NR_CPUS] __read_mostly;
-static union irq_ctx *softirq_ctx[NR_CPUS] __read_mostly;
-#endif
-
-/*
- * do_IRQ handles all normal device IRQ's (the special
- * SMP cross-CPU interrupts have their own specific
- * handlers).
- */
-fastcall unsigned int do_IRQ(struct pt_regs *regs)
-{      
-       struct pt_regs *old_regs;
-       /* high bit used in ret_from_ code */
-       int irq = ~regs->orig_eax;
-       struct irq_desc *desc = irq_desc + irq;
-#ifdef CONFIG_4KSTACKS
-       union irq_ctx *curctx, *irqctx;
-       u32 *isp;
-#endif
-
-       if (unlikely((unsigned)irq >= NR_IRQS)) {
-               printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
-                                       __FUNCTION__, irq);
-               BUG();
-       }
-
-       old_regs = set_irq_regs(regs);
-       irq_enter();
-#ifdef CONFIG_DEBUG_STACKOVERFLOW
-       /* Debugging check for stack overflow: is there less than 1KB free? */
-       {
-               long esp;
-
-               __asm__ __volatile__("andl %%esp,%0" :
-                                       "=r" (esp) : "0" (THREAD_SIZE - 1));
-               if (unlikely(esp < (sizeof(struct thread_info) + STACK_WARN))) {
-                       printk("do_IRQ: stack overflow: %ld\n",
-                               esp - sizeof(struct thread_info));
-                       dump_stack();
-               }
-       }
-#endif
-
-#ifdef CONFIG_4KSTACKS
-
-       curctx = (union irq_ctx *) current_thread_info();
-       irqctx = hardirq_ctx[smp_processor_id()];
-
-       /*
-        * this is where we switch to the IRQ stack. However, if we are
-        * already using the IRQ stack (because we interrupted a hardirq
-        * handler) we can't do that and just have to keep using the
-        * current stack (which is the irq stack already after all)
-        */
-       if (curctx != irqctx) {
-               int arg1, arg2, ebx;
-
-               /* build the stack frame on the IRQ stack */
-               isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
-               irqctx->tinfo.task = curctx->tinfo.task;
-               irqctx->tinfo.previous_esp = current_stack_pointer;
-
-               /*
-                * Copy the softirq bits in preempt_count so that the
-                * softirq checks work in the hardirq context.
-                */
-               irqctx->tinfo.preempt_count =
-                       (irqctx->tinfo.preempt_count & ~SOFTIRQ_MASK) |
-                       (curctx->tinfo.preempt_count & SOFTIRQ_MASK);
-
-               asm volatile(
-                       "       xchgl  %%ebx,%%esp      \n"
-                       "       call   *%%edi           \n"
-                       "       movl   %%ebx,%%esp      \n"
-                       : "=a" (arg1), "=d" (arg2), "=b" (ebx)
-                       :  "0" (irq),   "1" (desc),  "2" (isp),
-                          "D" (desc->handle_irq)
-                       : "memory", "cc"
-               );
-       } else
-#endif
-               desc->handle_irq(irq, desc);
-
-       irq_exit();
-       set_irq_regs(old_regs);
-       return 1;
-}
-
-#ifdef CONFIG_4KSTACKS
-
-static char softirq_stack[NR_CPUS * THREAD_SIZE]
-               __attribute__((__section__(".bss.page_aligned")));
-
-static char hardirq_stack[NR_CPUS * THREAD_SIZE]
-               __attribute__((__section__(".bss.page_aligned")));
-
-/*
- * allocate per-cpu stacks for hardirq and for softirq processing
- */
-void irq_ctx_init(int cpu)
-{
-       union irq_ctx *irqctx;
-
-       if (hardirq_ctx[cpu])
-               return;
-
-       irqctx = (union irq_ctx*) &hardirq_stack[cpu*THREAD_SIZE];
-       irqctx->tinfo.task              = NULL;
-       irqctx->tinfo.exec_domain       = NULL;
-       irqctx->tinfo.cpu               = cpu;
-       irqctx->tinfo.preempt_count     = HARDIRQ_OFFSET;
-       irqctx->tinfo.addr_limit        = MAKE_MM_SEG(0);
-
-       hardirq_ctx[cpu] = irqctx;
-
-       irqctx = (union irq_ctx*) &softirq_stack[cpu*THREAD_SIZE];
-       irqctx->tinfo.task              = NULL;
-       irqctx->tinfo.exec_domain       = NULL;
-       irqctx->tinfo.cpu               = cpu;
-       irqctx->tinfo.preempt_count     = 0;
-       irqctx->tinfo.addr_limit        = MAKE_MM_SEG(0);
-
-       softirq_ctx[cpu] = irqctx;
-
-       printk("CPU %u irqstacks, hard=%p soft=%p\n",
-               cpu,hardirq_ctx[cpu],softirq_ctx[cpu]);
-}
-
-void irq_ctx_exit(int cpu)
-{
-       hardirq_ctx[cpu] = NULL;
-}
-
-extern asmlinkage void __do_softirq(void);
-
-asmlinkage void do_softirq(void)
-{
-       unsigned long flags;
-       struct thread_info *curctx;
-       union irq_ctx *irqctx;
-       u32 *isp;
-
-       if (in_interrupt())
-               return;
-
-       local_irq_save(flags);
-
-       if (local_softirq_pending()) {
-               curctx = current_thread_info();
-               irqctx = softirq_ctx[smp_processor_id()];
-               irqctx->tinfo.task = curctx->task;
-               irqctx->tinfo.previous_esp = current_stack_pointer;
-
-               /* build the stack frame on the softirq stack */
-               isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
-
-               asm volatile(
-                       "       xchgl   %%ebx,%%esp     \n"
-                       "       call    __do_softirq    \n"
-                       "       movl    %%ebx,%%esp     \n"
-                       : "=b"(isp)
-                       : "0"(isp)
-                       : "memory", "cc", "edx", "ecx", "eax"
-               );
-               /*
-                * Shouldnt happen, we returned above if in_interrupt():
-                */
-               WARN_ON_ONCE(softirq_count());
-       }
-
-       local_irq_restore(flags);
-}
-
-EXPORT_SYMBOL(do_softirq);
-#endif
-
-/*
- * Interrupt statistics:
- */
-
-atomic_t irq_err_count;
-
-/*
- * /proc/interrupts printing:
- */
-
-int show_interrupts(struct seq_file *p, void *v)
-{
-       int i = *(loff_t *) v, j;
-       struct irqaction * action;
-       unsigned long flags;
-
-       if (i == 0) {
-               seq_printf(p, "           ");
-               for_each_online_cpu(j)
-                       seq_printf(p, "CPU%-8d",j);
-               seq_putc(p, '\n');
-       }
-
-       if (i < NR_IRQS) {
-               spin_lock_irqsave(&irq_desc[i].lock, flags);
-               action = irq_desc[i].action;
-               if (!action)
-                       goto skip;
-               seq_printf(p, "%3d: ",i);
-#ifndef CONFIG_SMP
-               seq_printf(p, "%10u ", kstat_irqs(i));
-#else
-               for_each_online_cpu(j)
-                       seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
-#endif
-               seq_printf(p, " %8s", irq_desc[i].chip->name);
-               seq_printf(p, "-%-8s", irq_desc[i].name);
-               seq_printf(p, "  %s", action->name);
-
-               for (action=action->next; action; action = action->next)
-                       seq_printf(p, ", %s", action->name);
-
-               seq_putc(p, '\n');
-skip:
-               spin_unlock_irqrestore(&irq_desc[i].lock, flags);
-       } else if (i == NR_IRQS) {
-               seq_printf(p, "NMI: ");
-               for_each_online_cpu(j)
-                       seq_printf(p, "%10u ", nmi_count(j));
-               seq_putc(p, '\n');
-#ifdef CONFIG_X86_LOCAL_APIC
-               seq_printf(p, "LOC: ");
-               for_each_online_cpu(j)
-                       seq_printf(p, "%10u ",
-                               per_cpu(irq_stat,j).apic_timer_irqs);
-               seq_putc(p, '\n');
-#endif
-               seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
-#if defined(CONFIG_X86_IO_APIC)
-               seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count));
-#endif
-       }
-       return 0;
-}
-
-#ifdef CONFIG_HOTPLUG_CPU
-#include <mach_apic.h>
-
-void fixup_irqs(cpumask_t map)
-{
-       unsigned int irq;
-       static int warned;
-
-       for (irq = 0; irq < NR_IRQS; irq++) {
-               cpumask_t mask;
-               if (irq == 2)
-                       continue;
-
-               cpus_and(mask, irq_desc[irq].affinity, map);
-               if (any_online_cpu(mask) == NR_CPUS) {
-                       printk("Breaking affinity for irq %i\n", irq);
-                       mask = map;
-               }
-               if (irq_desc[irq].chip->set_affinity)
-                       irq_desc[irq].chip->set_affinity(irq, mask);
-               else if (irq_desc[irq].action && !(warned++))
-                       printk("Cannot set affinity for irq %i\n", irq);
-       }
-
-#if 0
-       barrier();
-       /* Ingo Molnar says: "after the IO-APIC masks have been redirected
-          [note the nop - the interrupt-enable boundary on x86 is two
-          instructions from sti] - to flush out pending hardirqs and
-          IPIs. After this point nothing is supposed to reach this CPU." */
-       __asm__ __volatile__("sti; nop; cli");
-       barrier();
-#else
-       /* That doesn't seem sufficient.  Give it 1ms. */
-       local_irq_enable();
-       mdelay(1);
-       local_irq_disable();
-#endif
-}
-#endif
-
diff --git a/arch/i386/kernel/irq_32.c b/arch/i386/kernel/irq_32.c
new file mode 100644
index 0000000..dd2b97f
--- /dev/null
+++ b/arch/i386/kernel/irq_32.c
@@ -0,0 +1,343 @@
+/*
+ *     linux/arch/i386/kernel/irq.c
+ *
+ *     Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
+ *
+ * This file contains the lowest level x86-specific interrupt
+ * entry, irq-stacks and irq statistics code. All the remaining
+ * irq logic is done by the generic kernel/irq/ code and
+ * by the x86-specific irq controller code. (e.g. i8259.c and
+ * io_apic.c.)
+ */
+
+#include <linux/module.h>
+#include <linux/seq_file.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/notifier.h>
+#include <linux/cpu.h>
+#include <linux/delay.h>
+
+#include <asm/apic.h>
+#include <asm/uaccess.h>
+
+DEFINE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
+EXPORT_PER_CPU_SYMBOL(irq_stat);
+
+DEFINE_PER_CPU(struct pt_regs *, irq_regs);
+EXPORT_PER_CPU_SYMBOL(irq_regs);
+
+/*
+ * 'what should we do if we get a hw irq event on an illegal vector'.
+ * each architecture has to answer this themselves.
+ */
+void ack_bad_irq(unsigned int irq)
+{
+       printk(KERN_ERR "unexpected IRQ trap at vector %02x\n", irq);
+
+#ifdef CONFIG_X86_LOCAL_APIC
+       /*
+        * Currently unexpected vectors happen only on SMP and APIC.
+        * We _must_ ack these because every local APIC has only N
+        * irq slots per priority level, and a 'hanging, unacked' IRQ
+        * holds up an irq slot - in excessive cases (when multiple
+        * unexpected vectors occur) that might lock up the APIC
+        * completely.
+        * But only ack when the APIC is enabled -AK
+        */
+       if (cpu_has_apic)
+               ack_APIC_irq();
+#endif
+}
+
+#ifdef CONFIG_4KSTACKS
+/*
+ * per-CPU IRQ handling contexts (thread information and stack)
+ */
+union irq_ctx {
+       struct thread_info      tinfo;
+       u32                     stack[THREAD_SIZE/sizeof(u32)];
+};
+
+static union irq_ctx *hardirq_ctx[NR_CPUS] __read_mostly;
+static union irq_ctx *softirq_ctx[NR_CPUS] __read_mostly;
+#endif
+
+/*
+ * do_IRQ handles all normal device IRQ's (the special
+ * SMP cross-CPU interrupts have their own specific
+ * handlers).
+ */
+fastcall unsigned int do_IRQ(struct pt_regs *regs)
+{      
+       struct pt_regs *old_regs;
+       /* high bit used in ret_from_ code */
+       int irq = ~regs->orig_eax;
+       struct irq_desc *desc = irq_desc + irq;
+#ifdef CONFIG_4KSTACKS
+       union irq_ctx *curctx, *irqctx;
+       u32 *isp;
+#endif
+
+       if (unlikely((unsigned)irq >= NR_IRQS)) {
+               printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
+                                       __FUNCTION__, irq);
+               BUG();
+       }
+
+       old_regs = set_irq_regs(regs);
+       irq_enter();
+#ifdef CONFIG_DEBUG_STACKOVERFLOW
+       /* Debugging check for stack overflow: is there less than 1KB free? */
+       {
+               long esp;
+
+               __asm__ __volatile__("andl %%esp,%0" :
+                                       "=r" (esp) : "0" (THREAD_SIZE - 1));
+               if (unlikely(esp < (sizeof(struct thread_info) + STACK_WARN))) {
+                       printk("do_IRQ: stack overflow: %ld\n",
+                               esp - sizeof(struct thread_info));
+                       dump_stack();
+               }
+       }
+#endif
+
+#ifdef CONFIG_4KSTACKS
+
+       curctx = (union irq_ctx *) current_thread_info();
+       irqctx = hardirq_ctx[smp_processor_id()];
+
+       /*
+        * this is where we switch to the IRQ stack. However, if we are
+        * already using the IRQ stack (because we interrupted a hardirq
+        * handler) we can't do that and just have to keep using the
+        * current stack (which is the irq stack already after all)
+        */
+       if (curctx != irqctx) {
+               int arg1, arg2, ebx;
+
+               /* build the stack frame on the IRQ stack */
+               isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
+               irqctx->tinfo.task = curctx->tinfo.task;
+               irqctx->tinfo.previous_esp = current_stack_pointer;
+
+               /*
+                * Copy the softirq bits in preempt_count so that the
+                * softirq checks work in the hardirq context.
+                */
+               irqctx->tinfo.preempt_count =
+                       (irqctx->tinfo.preempt_count & ~SOFTIRQ_MASK) |
+                       (curctx->tinfo.preempt_count & SOFTIRQ_MASK);
+
+               asm volatile(
+                       "       xchgl  %%ebx,%%esp      \n"
+                       "       call   *%%edi           \n"
+                       "       movl   %%ebx,%%esp      \n"
+                       : "=a" (arg1), "=d" (arg2), "=b" (ebx)
+                       :  "0" (irq),   "1" (desc),  "2" (isp),
+                          "D" (desc->handle_irq)
+                       : "memory", "cc"
+               );
+       } else
+#endif
+               desc->handle_irq(irq, desc);
+
+       irq_exit();
+       set_irq_regs(old_regs);
+       return 1;
+}
+
+#ifdef CONFIG_4KSTACKS
+
+static char softirq_stack[NR_CPUS * THREAD_SIZE]
+               __attribute__((__section__(".bss.page_aligned")));
+
+static char hardirq_stack[NR_CPUS * THREAD_SIZE]
+               __attribute__((__section__(".bss.page_aligned")));
+
+/*
+ * allocate per-cpu stacks for hardirq and for softirq processing
+ */
+void irq_ctx_init(int cpu)
+{
+       union irq_ctx *irqctx;
+
+       if (hardirq_ctx[cpu])
+               return;
+
+       irqctx = (union irq_ctx*) &hardirq_stack[cpu*THREAD_SIZE];
+       irqctx->tinfo.task              = NULL;
+       irqctx->tinfo.exec_domain       = NULL;
+       irqctx->tinfo.cpu               = cpu;
+       irqctx->tinfo.preempt_count     = HARDIRQ_OFFSET;
+       irqctx->tinfo.addr_limit        = MAKE_MM_SEG(0);
+
+       hardirq_ctx[cpu] = irqctx;
+
+       irqctx = (union irq_ctx*) &softirq_stack[cpu*THREAD_SIZE];
+       irqctx->tinfo.task              = NULL;
+       irqctx->tinfo.exec_domain       = NULL;
+       irqctx->tinfo.cpu               = cpu;
+       irqctx->tinfo.preempt_count     = 0;
+       irqctx->tinfo.addr_limit        = MAKE_MM_SEG(0);
+
+       softirq_ctx[cpu] = irqctx;
+
+       printk("CPU %u irqstacks, hard=%p soft=%p\n",
+               cpu,hardirq_ctx[cpu],softirq_ctx[cpu]);
+}
+
+void irq_ctx_exit(int cpu)
+{
+       hardirq_ctx[cpu] = NULL;
+}
+
+extern asmlinkage void __do_softirq(void);
+
+asmlinkage void do_softirq(void)
+{
+       unsigned long flags;
+       struct thread_info *curctx;
+       union irq_ctx *irqctx;
+       u32 *isp;
+
+       if (in_interrupt())
+               return;
+
+       local_irq_save(flags);
+
+       if (local_softirq_pending()) {
+               curctx = current_thread_info();
+               irqctx = softirq_ctx[smp_processor_id()];
+               irqctx->tinfo.task = curctx->task;
+               irqctx->tinfo.previous_esp = current_stack_pointer;
+
+               /* build the stack frame on the softirq stack */
+               isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
+
+               asm volatile(
+                       "       xchgl   %%ebx,%%esp     \n"
+                       "       call    __do_softirq    \n"
+                       "       movl    %%ebx,%%esp     \n"
+                       : "=b"(isp)
+                       : "0"(isp)
+                       : "memory", "cc", "edx", "ecx", "eax"
+               );
+               /*
+                * Shouldnt happen, we returned above if in_interrupt():
+                */
+               WARN_ON_ONCE(softirq_count());
+       }
+
+       local_irq_restore(flags);
+}
+
+EXPORT_SYMBOL(do_softirq);
+#endif
+
+/*
+ * Interrupt statistics:
+ */
+
+atomic_t irq_err_count;
+
+/*
+ * /proc/interrupts printing:
+ */
+
+int show_interrupts(struct seq_file *p, void *v)
+{
+       int i = *(loff_t *) v, j;
+       struct irqaction * action;
+       unsigned long flags;
+
+       if (i == 0) {
+               seq_printf(p, "           ");
+               for_each_online_cpu(j)
+                       seq_printf(p, "CPU%-8d",j);
+               seq_putc(p, '\n');
+       }
+
+       if (i < NR_IRQS) {
+               spin_lock_irqsave(&irq_desc[i].lock, flags);
+               action = irq_desc[i].action;
+               if (!action)
+                       goto skip;
+               seq_printf(p, "%3d: ",i);
+#ifndef CONFIG_SMP
+               seq_printf(p, "%10u ", kstat_irqs(i));
+#else
+               for_each_online_cpu(j)
+                       seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
+#endif
+               seq_printf(p, " %8s", irq_desc[i].chip->name);
+               seq_printf(p, "-%-8s", irq_desc[i].name);
+               seq_printf(p, "  %s", action->name);
+
+               for (action=action->next; action; action = action->next)
+                       seq_printf(p, ", %s", action->name);
+
+               seq_putc(p, '\n');
+skip:
+               spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+       } else if (i == NR_IRQS) {
+               seq_printf(p, "NMI: ");
+               for_each_online_cpu(j)
+                       seq_printf(p, "%10u ", nmi_count(j));
+               seq_putc(p, '\n');
+#ifdef CONFIG_X86_LOCAL_APIC
+               seq_printf(p, "LOC: ");
+               for_each_online_cpu(j)
+                       seq_printf(p, "%10u ",
+                               per_cpu(irq_stat,j).apic_timer_irqs);
+               seq_putc(p, '\n');
+#endif
+               seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
+#if defined(CONFIG_X86_IO_APIC)
+               seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count));
+#endif
+       }
+       return 0;
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+#include <mach_apic.h>
+
+void fixup_irqs(cpumask_t map)
+{
+       unsigned int irq;
+       static int warned;
+
+       for (irq = 0; irq < NR_IRQS; irq++) {
+               cpumask_t mask;
+               if (irq == 2)
+                       continue;
+
+               cpus_and(mask, irq_desc[irq].affinity, map);
+               if (any_online_cpu(mask) == NR_CPUS) {
+                       printk("Breaking affinity for irq %i\n", irq);
+                       mask = map;
+               }
+               if (irq_desc[irq].chip->set_affinity)
+                       irq_desc[irq].chip->set_affinity(irq, mask);
+               else if (irq_desc[irq].action && !(warned++))
+                       printk("Cannot set affinity for irq %i\n", irq);
+       }
+
+#if 0
+       barrier();
+       /* Ingo Molnar says: "after the IO-APIC masks have been redirected
+          [note the nop - the interrupt-enable boundary on x86 is two
+          instructions from sti] - to flush out pending hardirqs and
+          IPIs. After this point nothing is supposed to reach this CPU." */
+       __asm__ __volatile__("sti; nop; cli");
+       barrier();
+#else
+       /* That doesn't seem sufficient.  Give it 1ms. */
+       local_irq_enable();
+       mdelay(1);
+       local_irq_disable();
+#endif
+}
+#endif
+
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