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

* 'generic-ipi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (22 commits) generic-ipi: more merge fallout generic-ipi: merge fix x86, visws: use mach-default/entry_arch.h x86, visws: fix generic-ipi build generic-ipi: fixlet generic-ipi: fix s390 build bug generic-ipi: fix linux-next tree build failure fix: "smp_call_function: get rid of the unused nonatomic/retry argument" fix: "smp_call_function: get rid of the unused nonatomic/retry argument" fix "smp_call_function: get rid of the unused nonatomic/retry argument" on_each_cpu(): kill unused 'retry' parameter smp_call_function: get rid of the unused nonatomic/retry argument sh: convert to generic helpers for IPI function calls parisc: convert to generic helpers for IPI function calls mips: convert to generic helpers for IPI function calls m32r: convert to generic helpers for IPI function calls arm: convert to generic helpers for IPI function calls alpha: convert to generic helpers for IPI function calls ia64: convert to generic helpers for IPI function calls powerpc: convert to generic helpers for IPI function calls ... Fix trivial conflicts due to rcu updates in kernel/rcupdate.c manually
author: Linus Torvalds <torvalds@linux-foundation.org> 2008-07-15 17:02:33 -0400
committer: Linus Torvalds <torvalds@linux-foundation.org> 2008-07-15 17:12:03 -0400
commit: 59190f4213462f191fc0d22d39b1cf18ea39ca39 (patch)
tree: 8f30fa62ae7d8948e7974dfecede3d6a41ae3ec3
parent: 64fd52a52077d3cd5a778ca031c0aaecf885eaa6 (diff)
parent: f6f88e9bfb6ced9871ed65ebe85c371de3c9e4be (diff)
129 files changed, 891 insertions, 1796 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index 3ea332b009e5..ad89a33d8c6e 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -39,3 +39,6 @@ config HAVE_KRETPROBES
 config HAVE_DMA_ATTRS
        def_bool n
+config USE_GENERIC_SMP_HELPERS
+        def_bool n
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 729cdbdf8036..dbe8c280fea9 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -528,6 +528,7 @@ config ARCH_MAY_HAVE_PC_FDC
 config SMP
        bool "Symmetric multi-processing support"
        depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
+        select USE_GENERIC_SMP_HELPERS
        ---help---
          This enables support for systems with more than one CPU. If you have
          a system with only one CPU, like most personal computers, say N. If
diff --git a/arch/alpha/kernel/core_marvel.c b/arch/alpha/kernel/core_marvel.c
index b04f1feb1dda..04dcc5e5d4c1 100644
--- a/arch/alpha/kernel/core_marvel.c
+++ b/arch/alpha/kernel/core_marvel.c
@@ -660,9 +660,9 @@ __marvel_rtc_io(u8 b, unsigned long addr, int write)
 #ifdef CONFIG_SMP
                if (smp_processor_id() != boot_cpuid)
-                        smp_call_function_on_cpu(__marvel_access_rtc,
+                        smp_call_function_single(boot_cpuid,
-                                                 &rtc_access, 1, 1,
+                                                 __marvel_access_rtc,
-                                                 cpumask_of_cpu(boot_cpuid));
+                                                 &rtc_access, 1);
                else
                        __marvel_access_rtc(&rtc_access);
 #else
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 96ed82fd9eef..351407e07e71 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -160,7 +160,7 @@ common_shutdown(int mode, char *restart_cmd)
        struct halt_info args;
        args.mode = mode;
        args.restart_cmd = restart_cmd;
-        on_each_cpu(common_shutdown_1, &args, 1, 0);
+        on_each_cpu(common_shutdown_1, &args, 0);
 }
 void
diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c
index 2525692db0ab..83df541650fc 100644
--- a/arch/alpha/kernel/smp.c
+++ b/arch/alpha/kernel/smp.c
@@ -62,6 +62,7 @@ static struct {
 enum ipi_message_type {
        IPI_RESCHEDULE,
        IPI_CALL_FUNC,
+        IPI_CALL_FUNC_SINGLE,
        IPI_CPU_STOP,
 };
@@ -558,51 +559,6 @@ send_ipi_message(cpumask_t to_whom, enum ipi_message_type operation)
                wripir(i);
 }
-/* Structure and data for smp_call_function.  This is designed to 
-   minimize static memory requirements.  Plus it looks cleaner.  */
-struct smp_call_struct {
-        void (*func) (void *info);
-        void *info;
-        long wait;
-        atomic_t unstarted_count;
-        atomic_t unfinished_count;
-};
-static struct smp_call_struct *smp_call_function_data;
-/* Atomicly drop data into a shared pointer.  The pointer is free if
-   it is initially locked.  If retry, spin until free.  */
-static int
-pointer_lock (void *lock, void *data, int retry)
-{
-        void *old, *tmp;
-        mb();
- again:
-        /* Compare and swap with zero.  */
-        asm volatile (
-        "1:     ldq_l   %0,%1\n"
-        "       mov     %3,%2\n"
-        "       bne     %0,2f\n"
-        "       stq_c   %2,%1\n"
-        "       beq     %2,1b\n"
-        "2:"
-        : "=&r"(old), "=m"(*(void **)lock), "=&r"(tmp)
-        : "r"(data)
-        : "memory");
-        if (old == 0)
-                return 0;
-        if (! retry)
-                return -EBUSY;
-        while (*(void **)lock)
-                barrier();
-        goto again;
-}
 void
 handle_ipi(struct pt_regs *regs)
 {
@@ -632,31 +588,12 @@ handle_ipi(struct pt_regs *regs)
                        break;
                case IPI_CALL_FUNC:
-                    {
+                        generic_smp_call_function_interrupt();
-                        struct smp_call_struct *data;
+                        break;
-                        void (*func)(void *info);
-                        void *info;
+                case IPI_CALL_FUNC_SINGLE:
-                        int wait;
+                        generic_smp_call_function_single_interrupt();
-                        data = smp_call_function_data;
-                        func = data->func;
-                        info = data->info;
-                        wait = data->wait;
-                        /* Notify the sending CPU that the data has been
-                           received, and execution is about to begin.  */
-                        mb();
-                        atomic_dec (&data->unstarted_count);
-                        /* At this point the structure may be gone unless
-                           wait is true.  */
-                        (*func)(info);
-                        /* Notify the sending CPU that the task is done.  */
-                        mb();
-                        if (wait) atomic_dec (&data->unfinished_count);
                        break;
-                    }
                case IPI_CPU_STOP:
                        halt();
@@ -700,102 +637,15 @@ smp_send_stop(void)
        send_ipi_message(to_whom, IPI_CPU_STOP);
 }
-/*
+void arch_send_call_function_ipi(cpumask_t mask)
- * Run a function on all other CPUs.
- *  <func>      The function to run. This must be fast and non-blocking.
- *  <info>      An arbitrary pointer to pass to the function.
- *  <retry>     If true, keep retrying until ready.
- *  <wait>      If true, wait until function has completed on other CPUs.
- *  [RETURNS]   0 on success, else a negative status code.
- *
- * Does not return until remote CPUs are nearly ready to execute <func>
- * or are or have executed.
- * You must not call this function with disabled interrupts or from a
- * hardware interrupt handler or from a bottom half handler.
- */
-int
-smp_call_function_on_cpu (void (*func) (void *info), void *info, int retry,
-                          int wait, cpumask_t to_whom)
 {
-        struct smp_call_struct data;
+        send_ipi_message(mask, IPI_CALL_FUNC);
-        unsigned long timeout;
-        int num_cpus_to_call;
-        
-        /* Can deadlock when called with interrupts disabled */
-        WARN_ON(irqs_disabled());
-        data.func = func;
-        data.info = info;
-        data.wait = wait;
-        cpu_clear(smp_processor_id(), to_whom);
-        num_cpus_to_call = cpus_weight(to_whom);
-        atomic_set(&data.unstarted_count, num_cpus_to_call);
-        atomic_set(&data.unfinished_count, num_cpus_to_call);
-        /* Acquire the smp_call_function_data mutex.  */
-        if (pointer_lock(&smp_call_function_data, &data, retry))
-                return -EBUSY;
-        /* Send a message to the requested CPUs.  */
-        send_ipi_message(to_whom, IPI_CALL_FUNC);
-        /* Wait for a minimal response.  */
-        timeout = jiffies + HZ;
-        while (atomic_read (&data.unstarted_count) > 0
-               && time_before (jiffies, timeout))
-                barrier();
-        /* If there's no response yet, log a message but allow a longer
-         * timeout period -- if we get a response this time, log
-         * a message saying when we got it.. 
-         */
-        if (atomic_read(&data.unstarted_count) > 0) {
-                long start_time = jiffies;
-                printk(KERN_ERR "%s: initial timeout -- trying long wait\n",
-                       __func__);
-                timeout = jiffies + 30 * HZ;
-                while (atomic_read(&data.unstarted_count) > 0
-                       && time_before(jiffies, timeout))
-                        barrier();
-                if (atomic_read(&data.unstarted_count) <= 0) {
-                        long delta = jiffies - start_time;
-                        printk(KERN_ERR 
-                               "%s: response %ld.%ld seconds into long wait\n",
-                               __func__, delta / HZ,
-                               (100 * (delta - ((delta / HZ) * HZ))) / HZ);
-                }
-        }
-        /* We either got one or timed out -- clear the lock. */
-        mb();
-        smp_call_function_data = NULL;
-        /* 
-         * If after both the initial and long timeout periods we still don't
-         * have a response, something is very wrong...
-         */
-        BUG_ON(atomic_read (&data.unstarted_count) > 0);
-        /* Wait for a complete response, if needed.  */
-        if (wait) {
-                while (atomic_read (&data.unfinished_count) > 0)
-                        barrier();
-        }
-        return 0;
 }
-EXPORT_SYMBOL(smp_call_function_on_cpu);
-int
+void arch_send_call_function_single_ipi(int cpu)
-smp_call_function (void (*func) (void *info), void *info, int retry, int wait)
 {
-        return smp_call_function_on_cpu (func, info, retry, wait,
+        send_ipi_message(cpumask_of_cpu(cpu), IPI_CALL_FUNC_SINGLE);
-                                         cpu_online_map);
 }
-EXPORT_SYMBOL(smp_call_function);
 static void
 ipi_imb(void *ignored)
@@ -807,7 +657,7 @@ void
 smp_imb(void)
 {
        /* Must wait other processors to flush their icache before continue. */
-        if (on_each_cpu(ipi_imb, NULL, 1, 1))
+        if (on_each_cpu(ipi_imb, NULL, 1))
                printk(KERN_CRIT "smp_imb: timed out\n");
 }
 EXPORT_SYMBOL(smp_imb);
@@ -823,7 +673,7 @@ flush_tlb_all(void)
 {
        /* Although we don't have any data to pass, we do want to
           synchronize with the other processors.  */
-        if (on_each_cpu(ipi_flush_tlb_all, NULL, 1, 1)) {
+        if (on_each_cpu(ipi_flush_tlb_all, NULL, 1)) {
                printk(KERN_CRIT "flush_tlb_all: timed out\n");
        }
 }
@@ -860,7 +710,7 @@ flush_tlb_mm(struct mm_struct *mm)
                }
        }
-        if (smp_call_function(ipi_flush_tlb_mm, mm, 1, 1)) {
+        if (smp_call_function(ipi_flush_tlb_mm, mm, 1)) {
                printk(KERN_CRIT "flush_tlb_mm: timed out\n");
        }
@@ -913,7 +763,7 @@ flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
        data.mm = mm;
        data.addr = addr;
-        if (smp_call_function(ipi_flush_tlb_page, &data, 1, 1)) {
+        if (smp_call_function(ipi_flush_tlb_page, &data, 1)) {
                printk(KERN_CRIT "flush_tlb_page: timed out\n");
        }
@@ -965,7 +815,7 @@ flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
                }
        }
-        if (smp_call_function(ipi_flush_icache_page, mm, 1, 1)) {
+        if (smp_call_function(ipi_flush_icache_page, mm, 1)) {
                printk(KERN_CRIT "flush_icache_page: timed out\n");
        }
diff --git a/arch/alpha/oprofile/common.c b/arch/alpha/oprofile/common.c
index 9fc0eeb4f0ab..7c3d5ec6ec67 100644
--- a/arch/alpha/oprofile/common.c
+++ b/arch/alpha/oprofile/common.c
@@ -65,7 +65,7 @@ op_axp_setup(void)
        model->reg_setup(&reg, ctr, &sys);
        /* Configure the registers on all cpus.  */
-        (void)smp_call_function(model->cpu_setup, &reg, 0, 1);
+        (void)smp_call_function(model->cpu_setup, &reg, 1);
        model->cpu_setup(&reg);
        return 0;
 }
@@ -86,7 +86,7 @@ op_axp_cpu_start(void *dummy)
 static int
 op_axp_start(void)
 {
-        (void)smp_call_function(op_axp_cpu_start, NULL, 0, 1);
+        (void)smp_call_function(op_axp_cpu_start, NULL, 1);
        op_axp_cpu_start(NULL);
        return 0;
 }
@@ -101,7 +101,7 @@ op_axp_cpu_stop(void *dummy)
 static void
 op_axp_stop(void)
 {
-        (void)smp_call_function(op_axp_cpu_stop, NULL, 0, 1);
+        (void)smp_call_function(op_axp_cpu_stop, NULL, 1);
        op_axp_cpu_stop(NULL);
 }
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 258f1369fb0c..c7ad324ddf2c 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -701,6 +701,7 @@ source "kernel/time/Kconfig"
 config SMP
        bool "Symmetric Multi-Processing (EXPERIMENTAL)"
        depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
+        select USE_GENERIC_SMP_HELPERS
        help
          This enables support for systems with more than one CPU. If you have
          a system with only one CPU, like most personal computers, say N. If
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index eefae1de334c..5a7c09564d13 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -68,20 +68,10 @@ enum ipi_msg_type {
        IPI_TIMER,
        IPI_RESCHEDULE,
        IPI_CALL_FUNC,
+        IPI_CALL_FUNC_SINGLE,
        IPI_CPU_STOP,
 };
-struct smp_call_struct {
-        void (*func)(void *info);
-        void *info;
-        int wait;
-        cpumask_t pending;
-        cpumask_t unfinished;
-};
-static struct smp_call_struct * volatile smp_call_function_data;
-static DEFINE_SPINLOCK(smp_call_function_lock);
 int __cpuinit __cpu_up(unsigned int cpu)
 {
        struct cpuinfo_arm *ci = &per_cpu(cpu_data, cpu);
@@ -366,114 +356,15 @@ static void send_ipi_message(cpumask_t callmap, enum ipi_msg_type msg)
        local_irq_restore(flags);
 }
-/*
+void arch_send_call_function_ipi(cpumask_t mask)
- * You must not call this function with disabled interrupts, from a
- * hardware interrupt handler, nor from a bottom half handler.
- */
-static int smp_call_function_on_cpu(void (*func)(void *info), void *info,
-                                    int retry, int wait, cpumask_t callmap)
-{
-        struct smp_call_struct data;
-        unsigned long timeout;
-        int ret = 0;
-        data.func = func;
-        data.info = info;
-        data.wait = wait;
-        cpu_clear(smp_processor_id(), callmap);
-        if (cpus_empty(callmap))
-                goto out;
-        data.pending = callmap;
-        if (wait)
-                data.unfinished = callmap;
-        /*
-         * try to get the mutex on smp_call_function_data
-         */
-        spin_lock(&smp_call_function_lock);
-        smp_call_function_data = &data;
-        send_ipi_message(callmap, IPI_CALL_FUNC);
-        timeout = jiffies + HZ;
-        while (!cpus_empty(data.pending) && time_before(jiffies, timeout))
-                barrier();
-        /*
-         * did we time out?
-         */
-        if (!cpus_empty(data.pending)) {
-                /*
-                 * this may be causing our panic - report it
-                 */
-                printk(KERN_CRIT
-                       "CPU%u: smp_call_function timeout for %p(%p)\n"
-                       "      callmap %lx pending %lx, %swait\n",
-                       smp_processor_id(), func, info, *cpus_addr(callmap),
-                       *cpus_addr(data.pending), wait ? "" : "no ");
-                /*
-                 * TRACE
-                 */
-                timeout = jiffies + (5 * HZ);
-                while (!cpus_empty(data.pending) && time_before(jiffies, timeout))
-                        barrier();
-                if (cpus_empty(data.pending))
-                        printk(KERN_CRIT "     RESOLVED\n");
-                else
-                        printk(KERN_CRIT "     STILL STUCK\n");
-        }
-        /*
-         * whatever happened, we're done with the data, so release it
-         */
-        smp_call_function_data = NULL;
-        spin_unlock(&smp_call_function_lock);
-        if (!cpus_empty(data.pending)) {
-                ret = -ETIMEDOUT;
-                goto out;
-        }
-        if (wait)
-                while (!cpus_empty(data.unfinished))
-                        barrier();
- out:
-        return 0;
-}
-int smp_call_function(void (*func)(void *info), void *info, int retry,
-                      int wait)
 {
-        return smp_call_function_on_cpu(func, info, retry, wait,
+        send_ipi_message(mask, IPI_CALL_FUNC);
-                                        cpu_online_map);
 }
-EXPORT_SYMBOL_GPL(smp_call_function);
-int smp_call_function_single(int cpu, void (*func)(void *info), void *info,
+void arch_send_call_function_single_ipi(int cpu)
-                             int retry, int wait)
 {
-        /* prevent preemption and reschedule on another processor */
+        send_ipi_message(cpumask_of_cpu(cpu), IPI_CALL_FUNC_SINGLE);
-        int current_cpu = get_cpu();
-        int ret = 0;
-        if (cpu == current_cpu) {
-                local_irq_disable();
-                func(info);
-                local_irq_enable();
-        } else
-                ret = smp_call_function_on_cpu(func, info, retry, wait,
-                                               cpumask_of_cpu(cpu));
-        put_cpu();
-        return ret;
 }
-EXPORT_SYMBOL_GPL(smp_call_function_single);
 void show_ipi_list(struct seq_file *p)
 {
@@ -521,27 +412,6 @@ asmlinkage void __exception do_local_timer(struct pt_regs *regs)
 }
 #endif
-/*
- * ipi_call_function - handle IPI from smp_call_function()
- *
- * Note that we copy data out of the cross-call structure and then
- * let the caller know that we're here and have done with their data
- */
-static void ipi_call_function(unsigned int cpu)
-{
-        struct smp_call_struct *data = smp_call_function_data;
-        void (*func)(void *info) = data->func;
-        void *info = data->info;
-        int wait = data->wait;
-        cpu_clear(cpu, data->pending);
-        func(info);
-        if (wait)
-                cpu_clear(cpu, data->unfinished);
-}
 static DEFINE_SPINLOCK(stop_lock);
 /*
@@ -611,7 +481,11 @@ asmlinkage void __exception do_IPI(struct pt_regs *regs)
                                break;
                        case IPI_CALL_FUNC:
-                                ipi_call_function(cpu);
+                                generic_smp_call_function_interrupt();
+                                break;
+                        case IPI_CALL_FUNC_SINGLE:
+                                generic_smp_call_function_single_interrupt();
                                break;
                        case IPI_CPU_STOP:
@@ -662,14 +536,13 @@ int setup_profiling_timer(unsigned int multiplier)
 }
 static int
-on_each_cpu_mask(void (*func)(void *), void *info, int retry, int wait,
+on_each_cpu_mask(void (*func)(void *), void *info, int wait, cpumask_t mask)
-                 cpumask_t mask)
 {
        int ret = 0;
        preempt_disable();
-        ret = smp_call_function_on_cpu(func, info, retry, wait, mask);
+        ret = smp_call_function_mask(mask, func, info, wait);
        if (cpu_isset(smp_processor_id(), mask))
                func(info);
@@ -731,14 +604,14 @@ static inline void ipi_flush_tlb_kernel_range(void *arg)
 void flush_tlb_all(void)
 {
-        on_each_cpu(ipi_flush_tlb_all, NULL, 1, 1);
+        on_each_cpu(ipi_flush_tlb_all, NULL, 1);
 }
 void flush_tlb_mm(struct mm_struct *mm)
 {
        cpumask_t mask = mm->cpu_vm_mask;
-        on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, 1, mask);
+        on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, mask);
 }
 void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
@@ -749,7 +622,7 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
        ta.ta_vma = vma;
        ta.ta_start = uaddr;
-        on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, 1, mask);
+        on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, mask);
 }
 void flush_tlb_kernel_page(unsigned long kaddr)
@@ -758,7 +631,7 @@ void flush_tlb_kernel_page(unsigned long kaddr)
        ta.ta_start = kaddr;
-        on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1, 1);
+        on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1);
 }
 void flush_tlb_range(struct vm_area_struct *vma,
@@ -771,7 +644,7 @@ void flush_tlb_range(struct vm_area_struct *vma,
        ta.ta_start = start;
        ta.ta_end = end;
-        on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, 1, mask);
+        on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, mask);
 }
 void flush_tlb_kernel_range(unsigned long start, unsigned long end)
@@ -781,5 +654,5 @@ void flush_tlb_kernel_range(unsigned long start, unsigned long end)
        ta.ta_start = start;
        ta.ta_end = end;
-        on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1, 1);
+        on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1);
 }
diff --git a/arch/arm/oprofile/op_model_mpcore.c b/arch/arm/oprofile/op_model_mpcore.c
index 74fae6045650..4458705021e0 100644
--- a/arch/arm/oprofile/op_model_mpcore.c
+++ b/arch/arm/oprofile/op_model_mpcore.c
@@ -201,7 +201,7 @@ static int em_call_function(int (*fn)(void))
        data.ret = 0;
        preempt_disable();
-        smp_call_function(em_func, &data, 1, 1);
+        smp_call_function(em_func, &data, 1);
        em_func(&data);
        preempt_enable();
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 32455c633f1c..c0d2c9bb952b 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -352,7 +352,7 @@ static int __init vfp_init(void)
        else if (vfpsid & FPSID_NODOUBLE) {
                printk("no double precision support\n");
        } else {
-                smp_call_function(vfp_enable, NULL, 1, 1);
+                smp_call_function(vfp_enable, NULL, 1);
                VFP_arch = (vfpsid & FPSID_ARCH_MASK) >> FPSID_ARCH_BIT;  /* Extract the architecture version */
                printk("implementor %02x architecture %d part %02x variant %x rev %x\n",
diff --git a/arch/cris/arch-v32/kernel/smp.c b/arch/cris/arch-v32/kernel/smp.c
index a9c3334e46c9..952a24b2f5a9 100644
--- a/arch/cris/arch-v32/kernel/smp.c
+++ b/arch/cris/arch-v32/kernel/smp.c
@@ -194,7 +194,7 @@ void stop_this_cpu(void* dummy)
 /* Other calls */
 void smp_send_stop(void)
 {
-        smp_call_function(stop_this_cpu, NULL, 1, 0);
+        smp_call_function(stop_this_cpu, NULL, 0);
 }
 int setup_profiling_timer(unsigned int multiplier)
@@ -316,8 +316,7 @@ int send_ipi(int vector, int wait, cpumask_t cpu_mask)
 * You must not call this function with disabled interrupts or from a
 * hardware interrupt handler or from a bottom half handler.
 */
-int smp_call_function(void (*func)(void *info), void *info,
+int smp_call_function(void (*func)(void *info), void *info, int wait)
-                      int nonatomic, int wait)
 {
        cpumask_t cpu_mask = CPU_MASK_ALL;
        struct call_data_struct data;
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 16be41446b5b..18bcc10903b4 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -303,6 +303,7 @@ config VIRT_CPU_ACCOUNTING
 config SMP
        bool "Symmetric multi-processing support"
+        select USE_GENERIC_SMP_HELPERS
        help
          This enables support for systems with more than one CPU. If you have
          a system with only one CPU, say N.  If you have a system with more
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 705176b434b3..7dd96c127177 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -707,7 +707,7 @@ ia64_mca_cmc_vector_enable (void *dummy)
 static void
 ia64_mca_cmc_vector_disable_keventd(struct work_struct *unused)
 {
-        on_each_cpu(ia64_mca_cmc_vector_disable, NULL, 1, 0);
+        on_each_cpu(ia64_mca_cmc_vector_disable, NULL, 0);
 }
 /*
@@ -719,7 +719,7 @@ ia64_mca_cmc_vector_disable_keventd(struct work_struct *unused)
 static void
 ia64_mca_cmc_vector_enable_keventd(struct work_struct *unused)
 {
-        on_each_cpu(ia64_mca_cmc_vector_enable, NULL, 1, 0);
+        on_each_cpu(ia64_mca_cmc_vector_enable, NULL, 0);
 }
 /*
@@ -1881,7 +1881,7 @@ static int __cpuinit mca_cpu_callback(struct notifier_block *nfb,
        case CPU_ONLINE:
        case CPU_ONLINE_FROZEN:
                smp_call_function_single(hotcpu, ia64_mca_cmc_vector_adjust,
-                                         NULL, 1, 0);
+                                         NULL, 0);
                break;
        }
        return NOTIFY_OK;
diff --git a/arch/ia64/kernel/palinfo.c b/arch/ia64/kernel/palinfo.c
index 9dc00f7fe10e..e5c57f413ca2 100644
--- a/arch/ia64/kernel/palinfo.c
+++ b/arch/ia64/kernel/palinfo.c
@@ -921,7 +921,7 @@ int palinfo_handle_smp(pal_func_cpu_u_t *f, char *page)
        /* will send IPI to other CPU and wait for completion of remote call */
-        if ((ret=smp_call_function_single(f->req_cpu, palinfo_smp_call, &ptr, 0, 1))) {
+        if ((ret=smp_call_function_single(f->req_cpu, palinfo_smp_call, &ptr, 1))) {
                printk(KERN_ERR "palinfo: remote CPU call from %d to %d on function %d: "
                       "error %d\n", smp_processor_id(), f->req_cpu, f->func_id, ret);
                return 0;
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 7714a97b0104..19d4493c6193 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -1820,7 +1820,7 @@ pfm_syswide_cleanup_other_cpu(pfm_context_t *ctx)
        int ret;
        DPRINT(("calling CPU%d for cleanup\n", ctx->ctx_cpu));
-        ret = smp_call_function_single(ctx->ctx_cpu, pfm_syswide_force_stop, ctx, 0, 1);
+        ret = smp_call_function_single(ctx->ctx_cpu, pfm_syswide_force_stop, ctx, 1);
        DPRINT(("called CPU%d for cleanup ret=%d\n", ctx->ctx_cpu, ret));
 }
 #endif /* CONFIG_SMP */
@@ -6508,7 +6508,7 @@ pfm_install_alt_pmu_interrupt(pfm_intr_handler_desc_t *hdl)
        }
        /* save the current system wide pmu states */
-        ret = on_each_cpu(pfm_alt_save_pmu_state, NULL, 0, 1);
+        ret = on_each_cpu(pfm_alt_save_pmu_state, NULL, 1);
        if (ret) {
                DPRINT(("on_each_cpu() failed: %d\n", ret));
                goto cleanup_reserve;
@@ -6553,7 +6553,7 @@ pfm_remove_alt_pmu_interrupt(pfm_intr_handler_desc_t *hdl)
        pfm_alt_intr_handler = NULL;
-        ret = on_each_cpu(pfm_alt_restore_pmu_state, NULL, 0, 1);
+        ret = on_each_cpu(pfm_alt_restore_pmu_state, NULL, 1);
        if (ret) {
                DPRINT(("on_each_cpu() failed: %d\n", ret));
        }
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index a3a34b4eb038..fabaf08d9a69 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -286,7 +286,7 @@ void cpu_idle_wait(void)
 {
        smp_mb();
        /* kick all the CPUs so that they exit out of pm_idle */
-        smp_call_function(do_nothing, NULL, 0, 1);
+        smp_call_function(do_nothing, NULL, 1);
 }
 EXPORT_SYMBOL_GPL(cpu_idle_wait);
diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 983296f1c813..3676468612b6 100644
--- a/arch/ia64/kernel/smp.c
+++ b/arch/ia64/kernel/smp.c
@@ -60,25 +60,9 @@ static struct local_tlb_flush_counts {
 static DEFINE_PER_CPU(unsigned int, shadow_flush_counts[NR_CPUS]) ____cacheline_aligned;
-/*
- * Structure and data for smp_call_function(). This is designed to minimise static memory
- * requirements. It also looks cleaner.
- */
-static  __cacheline_aligned DEFINE_SPINLOCK(call_lock);
-struct call_data_struct {
-        void (*func) (void *info);
-        void *info;
-        long wait;
-        atomic_t started;
-        atomic_t finished;
-};
-static volatile struct call_data_struct *call_data;
 #define IPI_CALL_FUNC           0
 #define IPI_CPU_STOP            1
+#define IPI_CALL_FUNC_SINGLE    2
 #define IPI_KDUMP_CPU_STOP      3
 /* This needs to be cacheline aligned because it is written to by *other* CPUs.  */
@@ -86,43 +70,6 @@ static DEFINE_PER_CPU_SHARED_ALIGNED(u64, ipi_operation);
 extern void cpu_halt (void);
-void
-lock_ipi_calllock(void)
-{
-        spin_lock_irq(&call_lock);
-}
-void
-unlock_ipi_calllock(void)
-{
-        spin_unlock_irq(&call_lock);
-}
-static inline void
-handle_call_data(void)
-{
-        struct call_data_struct *data;
-        void (*func)(void *info);
-        void *info;
-        int wait;
-        /* release the 'pointer lock' */
-        data = (struct call_data_struct *)call_data;
-        func = data->func;
-        info = data->info;
-        wait = data->wait;
-        mb();
-        atomic_inc(&data->started);
-        /* At this point the structure may be gone unless wait is true. */
-        (*func)(info);
-        /* Notify the sending CPU that the task is done. */
-        mb();
-        if (wait)
-                atomic_inc(&data->finished);
-}
 static void
 stop_this_cpu(void)
 {
@@ -163,13 +110,15 @@ handle_IPI (int irq, void *dev_id)
                        ops &= ~(1 << which);
                        switch (which) {
-                        case IPI_CALL_FUNC:
-                                handle_call_data();
-                                break;
                        case IPI_CPU_STOP:
                                stop_this_cpu();
                                break;
+                        case IPI_CALL_FUNC:
+                                generic_smp_call_function_interrupt();
+                                break;
+                        case IPI_CALL_FUNC_SINGLE:
+                                generic_smp_call_function_single_interrupt();
+                                break;
 #ifdef CONFIG_KEXEC
                        case IPI_KDUMP_CPU_STOP:
                                unw_init_running(kdump_cpu_freeze, NULL);
@@ -187,6 +136,8 @@ handle_IPI (int irq, void *dev_id)
        return IRQ_HANDLED;
 }
 /*
 * Called with preemption disabled.
 */
@@ -334,7 +285,7 @@ smp_flush_tlb_cpumask(cpumask_t xcpumask)
 void
 smp_flush_tlb_all (void)
 {
-        on_each_cpu((void (*)(void *))local_flush_tlb_all, NULL, 1, 1);
+        on_each_cpu((void (*)(void *))local_flush_tlb_all, NULL, 1);
 }
 void
@@ -357,193 +308,18 @@ smp_flush_tlb_mm (struct mm_struct *mm)
         * anyhow, and once a CPU is interrupted, the cost of local_flush_tlb_all() is
         * rather trivial.
         */
-        on_each_cpu((void (*)(void *))local_finish_flush_tlb_mm, mm, 1, 1);
+        on_each_cpu((void (*)(void *))local_finish_flush_tlb_mm, mm, 1);
 }
-/*
+void arch_send_call_function_single_ipi(int cpu)
- * Run a function on a specific CPU
- *  <func>      The function to run. This must be fast and non-blocking.
- *  <info>      An arbitrary pointer to pass to the function.
- *  <nonatomic> Currently unused.
- *  <wait>      If true, wait until function has completed on other CPUs.
- *  [RETURNS]   0 on success, else a negative status code.
- *
- * Does not return until the remote CPU is nearly ready to execute <func>
- * or is or has executed.
- */
-int
-smp_call_function_single (int cpuid, void (*func) (void *info), void *info, int nonatomic,
-                          int wait)
-{
-        struct call_data_struct data;
-        int cpus = 1;
-        int me = get_cpu(); /* prevent preemption and reschedule on another processor */
-        if (cpuid == me) {
-                local_irq_disable();
-                func(info);
-                local_irq_enable();
-                put_cpu();
-                return 0;
-        }
-        data.func = func;
-        data.info = info;
-        atomic_set(&data.started, 0);
-        data.wait = wait;
-        if (wait)
-                atomic_set(&data.finished, 0);
-        spin_lock_bh(&call_lock);
-        call_data = &data;
-        mb();   /* ensure store to call_data precedes setting of IPI_CALL_FUNC */
-        send_IPI_single(cpuid, IPI_CALL_FUNC);
-        /* Wait for response */
-        while (atomic_read(&data.started) != cpus)
-                cpu_relax();
-        if (wait)
-                while (atomic_read(&data.finished) != cpus)
-                        cpu_relax();
-        call_data = NULL;
-        spin_unlock_bh(&call_lock);
-        put_cpu();
-        return 0;
-}
-EXPORT_SYMBOL(smp_call_function_single);
-/**
- * smp_call_function_mask(): Run a function on a set of other CPUs.
- * <mask>       The set of cpus to run on.  Must not include the current cpu.
- * <func>       The function to run. This must be fast and non-blocking.
- * <info>       An arbitrary pointer to pass to the function.
- * <wait>       If true, wait (atomically) until function
- *              has completed on other CPUs.
- *
- * Returns 0 on success, else a negative status code.
- *
- * If @wait is true, then returns once @func has returned; otherwise
- * it returns just before the target cpu calls @func.
- *
- * You must not call this function with disabled interrupts or from a
- * hardware interrupt handler or from a bottom half handler.
- */
-int smp_call_function_mask(cpumask_t mask,
-                           void (*func)(void *), void *info,
-                           int wait)
 {
-        struct call_data_struct data;
+        send_IPI_single(cpu, IPI_CALL_FUNC_SINGLE);
-        cpumask_t allbutself;
-        int cpus;
-        spin_lock(&call_lock);
-        allbutself = cpu_online_map;
-        cpu_clear(smp_processor_id(), allbutself);
-        cpus_and(mask, mask, allbutself);
-        cpus = cpus_weight(mask);
-        if (!cpus) {
-                spin_unlock(&call_lock);
-                return 0;
-        }
-        /* Can deadlock when called with interrupts disabled */
-        WARN_ON(irqs_disabled());
-        data.func = func;
-        data.info = info;
-        atomic_set(&data.started, 0);
-        data.wait = wait;
-        if (wait)
-                atomic_set(&data.finished, 0);
-        call_data = &data;
-        mb(); /* ensure store to call_data precedes setting of IPI_CALL_FUNC*/
-        /* Send a message to other CPUs */
-        if (cpus_equal(mask, allbutself))
-                send_IPI_allbutself(IPI_CALL_FUNC);
-        else
-                send_IPI_mask(mask, IPI_CALL_FUNC);
-        /* Wait for response */
-        while (atomic_read(&data.started) != cpus)
-                cpu_relax();
-        if (wait)
-                while (atomic_read(&data.finished) != cpus)
-                        cpu_relax();
-        call_data = NULL;
-        spin_unlock(&call_lock);
-        return 0;
 }
-EXPORT_SYMBOL(smp_call_function_mask);
-/*
+void arch_send_call_function_ipi(cpumask_t mask)
- * this function sends a 'generic call function' IPI to all other CPUs
- * in the system.
- */
-/*
- *  [SUMMARY]   Run a function on all other CPUs.
- *  <func>      The function to run. This must be fast and non-blocking.
- *  <info>      An arbitrary pointer to pass to the function.
- *  <nonatomic> currently unused.
- *  <wait>      If true, wait (atomically) until function has completed on other CPUs.
- *  [RETURNS]   0 on success, else a negative status code.
- *
- * Does not return until remote CPUs are nearly ready to execute <func> or are or have
- * executed.
- *
- * You must not call this function with disabled interrupts or from a
- * hardware interrupt handler or from a bottom half handler.
- */
-int
-smp_call_function (void (*func) (void *info), void *info, int nonatomic, int wait)
 {
-        struct call_data_struct data;
+        send_IPI_mask(mask, IPI_CALL_FUNC);
-        int cpus;
-        spin_lock(&call_lock);
-        cpus = num_online_cpus() - 1;
-        if (!cpus) {
-                spin_unlock(&call_lock);
-                return 0;
-        }
-        /* Can deadlock when called with interrupts disabled */
-        WARN_ON(irqs_disabled());
-        data.func = func;
-        data.info = info;
-        atomic_set(&data.started, 0);
-        data.wait = wait;
-        if (wait)
-                atomic_set(&data.finished, 0);
-        call_data = &data;
-        mb();   /* ensure store to call_data precedes setting of IPI_CALL_FUNC */
-        send_IPI_allbutself(IPI_CALL_FUNC);
-        /* Wait for response */
-        while (atomic_read(&data.started) != cpus)
-                cpu_relax();
-        if (wait)
-                while (atomic_read(&data.finished) != cpus)
-                        cpu_relax();
-        call_data = NULL;
-        spin_unlock(&call_lock);
-        return 0;
 }
-EXPORT_SYMBOL(smp_call_function);
 /*
 * this function calls the 'stop' function on all other CPUs in the system.
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index d7ad42b77d41..9d1d429c6c59 100644
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -317,7 +317,7 @@ ia64_sync_itc (unsigned int master)
        go[MASTER] = 1;
-        if (smp_call_function_single(master, sync_master, NULL, 1, 0) < 0) {
+        if (smp_call_function_single(master, sync_master, NULL, 0) < 0) {
                printk(KERN_ERR "sync_itc: failed to get attention of CPU %u!\n", master);
                return;
        }
@@ -395,14 +395,14 @@ smp_callin (void)
        fix_b0_for_bsp();
-        lock_ipi_calllock();
+        ipi_call_lock_irq();
        spin_lock(&vector_lock);
        /* Setup the per cpu irq handling data structures */
        __setup_vector_irq(cpuid);
        cpu_set(cpuid, cpu_online_map);
        per_cpu(cpu_state, cpuid) = CPU_ONLINE;
        spin_unlock(&vector_lock);
-        unlock_ipi_calllock();
+        ipi_call_unlock_irq();
        smp_setup_percpu_timer();
diff --git a/arch/ia64/kernel/uncached.c b/arch/ia64/kernel/uncached.c
index e77995a6e3ed..8eff8c1d40a6 100644
--- a/arch/ia64/kernel/uncached.c
+++ b/arch/ia64/kernel/uncached.c
@@ -123,8 +123,7 @@ static int uncached_add_chunk(struct uncached_pool *uc_pool, int nid)
        status = ia64_pal_prefetch_visibility(PAL_VISIBILITY_PHYSICAL);
        if (status == PAL_VISIBILITY_OK_REMOTE_NEEDED) {
                atomic_set(&uc_pool->status, 0);
-                status = smp_call_function(uncached_ipi_visibility, uc_pool,
+                status = smp_call_function(uncached_ipi_visibility, uc_pool, 1);
-                                           0, 1);
                if (status || atomic_read(&uc_pool->status))
                        goto failed;
        } else if (status != PAL_VISIBILITY_OK)
@@ -146,7 +145,7 @@ static int uncached_add_chunk(struct uncached_pool *uc_pool, int nid)
        if (status != PAL_STATUS_SUCCESS)
                goto failed;
        atomic_set(&uc_pool->status, 0);
-        status = smp_call_function(uncached_ipi_mc_drain, uc_pool, 0, 1);
+        status = smp_call_function(uncached_ipi_mc_drain, uc_pool, 1);
        if (status || atomic_read(&uc_pool->status))
                goto failed;
diff --git a/arch/ia64/sn/kernel/sn2/sn_hwperf.c b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
index 8cc0c4753d89..636588e7e068 100644
--- a/arch/ia64/sn/kernel/sn2/sn_hwperf.c
+++ b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
@@ -629,7 +629,7 @@ static int sn_hwperf_op_cpu(struct sn_hwperf_op_info *op_info)
                if (use_ipi) {
                        /* use an interprocessor interrupt to call SAL */
                        smp_call_function_single(cpu, sn_hwperf_call_sal,
-                                op_info, 1, 1);
+                                op_info, 1);
                }
                else {
                        /* migrate the task before calling SAL */ 
diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig
index de153de2ea9f..a5f864c445b2 100644
--- a/arch/m32r/Kconfig
+++ b/arch/m32r/Kconfig
@@ -296,6 +296,7 @@ config PREEMPT
 config SMP
        bool "Symmetric multi-processing support"
+        select USE_GENERIC_SMP_HELPERS
        ---help---
          This enables support for systems with more than one CPU. If you have
          a system with only one CPU, like most personal computers, say N. If
diff --git a/arch/m32r/kernel/m32r_ksyms.c b/arch/m32r/kernel/m32r_ksyms.c
index e6709fe950ba..16bcb189a383 100644
--- a/arch/m32r/kernel/m32r_ksyms.c
+++ b/arch/m32r/kernel/m32r_ksyms.c
@@ -43,9 +43,6 @@ EXPORT_SYMBOL(dcache_dummy);
 #endif
 EXPORT_SYMBOL(cpu_data);
-/* Global SMP stuff */
-EXPORT_SYMBOL(smp_call_function);
 /* TLB flushing */
 EXPORT_SYMBOL(smp_flush_tlb_page);
 #endif
diff --git a/arch/m32r/kernel/smp.c b/arch/m32r/kernel/smp.c
index c837bc13b015..7577f971ea4e 100644
--- a/arch/m32r/kernel/smp.c
+++ b/arch/m32r/kernel/smp.c
@@ -35,22 +35,6 @@
 /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/
 /*
- * Structure and data for smp_call_function(). This is designed to minimise
- * static memory requirements. It also looks cleaner.
- */
-static DEFINE_SPINLOCK(call_lock);
-struct call_data_struct {
-        void (*func) (void *info);
-        void *info;
-        atomic_t started;
-        atomic_t finished;
-        int wait;
-} __attribute__ ((__aligned__(SMP_CACHE_BYTES)));
-static struct call_data_struct *call_data;
-/*
 * For flush_cache_all()
 */
 static DEFINE_SPINLOCK(flushcache_lock);
@@ -96,9 +80,6 @@ void smp_invalidate_interrupt(void);
 void smp_send_stop(void);
 static void stop_this_cpu(void *);
-int smp_call_function(void (*) (void *), void *, int, int);
-void smp_call_function_interrupt(void);
 void smp_send_timer(void);
 void smp_ipi_timer_interrupt(struct pt_regs *);
 void smp_local_timer_interrupt(void);
@@ -231,7 +212,7 @@ void smp_flush_tlb_all(void)
        local_irq_save(flags);
        __flush_tlb_all();
        local_irq_restore(flags);
-        smp_call_function(flush_tlb_all_ipi, NULL, 1, 1);
+        smp_call_function(flush_tlb_all_ipi, NULL, 1);
        preempt_enable();
 }
@@ -524,7 +505,7 @@ void smp_invalidate_interrupt(void)
 *==========================================================================*/
 void smp_send_stop(void)
 {
-        smp_call_function(stop_this_cpu, NULL, 1, 0);
+        smp_call_function(stop_this_cpu, NULL, 0);
 }
 /*==========================================================================*
@@ -565,86 +546,14 @@ static void stop_this_cpu(void *dummy)
        for ( ; ; );
 }
-/*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/
+void arch_send_call_function_ipi(cpumask_t mask)
-/* Call function Routines                                                    */
-/*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/
-/*==========================================================================*
- * Name:         smp_call_function
- *
- * Description:  This routine sends a 'CALL_FUNCTION_IPI' to all other CPUs
- *               in the system.
- *
- * Born on Date: 2002.02.05
- *
- * Arguments:    *func - The function to run. This must be fast and
- *                       non-blocking.
- *               *info - An arbitrary pointer to pass to the function.
- *               nonatomic - currently unused.
- *               wait - If true, wait (atomically) until function has
- *                      completed on other CPUs.
- *
- * Returns:      0 on success, else a negative status code. Does not return
- *               until remote CPUs are nearly ready to execute <<func>> or
- *               are or have executed.
- *
- * Cautions:     You must not call this function with disabled interrupts or
- *               from a hardware interrupt handler, you may call it from a
- *               bottom half handler.
- *
- * Modification log:
- * Date       Who Description
- * ---------- --- --------------------------------------------------------
- *
- *==========================================================================*/
-int smp_call_function(void (*func) (void *info), void *info, int nonatomic,
-        int wait)
 {
-        struct call_data_struct data;
+        send_IPI_mask(mask, CALL_FUNCTION_IPI, 0);
-        int cpus;
+}
-#ifdef DEBUG_SMP
-        unsigned long flags;
-        __save_flags(flags);
-        if (!(flags & 0x0040))  /* Interrupt Disable NONONO */
-                BUG();
-#endif /* DEBUG_SMP */
-        /* Holding any lock stops cpus from going down. */
-        spin_lock(&call_lock);
-        cpus = num_online_cpus() - 1;
-        if (!cpus) {
-                spin_unlock(&call_lock);
-                return 0;
-        }
-        /* Can deadlock when called with interrupts disabled */
-        WARN_ON(irqs_disabled());
-        data.func = func;
-        data.info = info;
-        atomic_set(&data.started, 0);
-        data.wait = wait;
-        if (wait)
-                atomic_set(&data.finished, 0);
-        call_data = &data;
-        mb();
-        /* Send a message to all other CPUs and wait for them to respond */
-        send_IPI_allbutself(CALL_FUNCTION_IPI, 0);
-        /* Wait for response */
-        while (atomic_read(&data.started) != cpus)
-                barrier();
-        if (wait)
-                while (atomic_read(&data.finished) != cpus)
-                        barrier();
-        spin_unlock(&call_lock);
-        return 0;
+void arch_send_call_function_single_ipi(int cpu)
+{
+        send_IPI_mask(cpumask_of_cpu(cpu), CALL_FUNC_SINGLE_IPI, 0);
 }
 /*==========================================================================*
@@ -666,27 +575,16 @@ int smp_call_function(void (*func) (void *info), void *info, int nonatomic,
 *==========================================================================*/
 void smp_call_function_interrupt(void)
 {
-        void (*func) (void *info) = call_data->func;
-        void *info = call_data->info;
-        int wait = call_data->wait;
-        /*
-         * Notify initiating CPU that I've grabbed the data and am
-         * about to execute the function
-         */
-        mb();
-        atomic_inc(&call_data->started);
-        /*
-         * At this point the info structure may be out of scope unless wait==1
-         */
        irq_enter();
-        (*func)(info);
+        generic_smp_call_function_interrupt();
        irq_exit();
+}
-        if (wait) {
+void smp_call_function_single_interrupt(void)
-                mb();
+{
-                atomic_inc(&call_data->finished);
+        irq_enter();
-        }
+        generic_smp_call_function_single_interrupt();
+        irq_exit();
 }
 /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/
diff --git a/arch/m32r/kernel/traps.c b/arch/m32r/kernel/traps.c
index 89ba4a0b5d51..46159a4e644b 100644
--- a/arch/m32r/kernel/traps.c
+++ b/arch/m32r/kernel/traps.c
@@ -40,6 +40,7 @@ extern void smp_invalidate_interrupt(void);
 extern void smp_call_function_interrupt(void);
 extern void smp_ipi_timer_interrupt(void);
 extern void smp_flush_cache_all_interrupt(void);
+extern void smp_call_function_single_interrupt(void);
 /*
 * for Boot AP function
@@ -103,7 +104,7 @@ void	set_eit_vector_entries(void)
        eit_vector[186] = (unsigned long)smp_call_function_interrupt;
        eit_vector[187] = (unsigned long)smp_ipi_timer_interrupt;
        eit_vector[188] = (unsigned long)smp_flush_cache_all_interrupt;
-        eit_vector[189] = 0;
+        eit_vector[189] = (unsigned long)smp_call_function_single_interrupt;
        eit_vector[190] = 0;
        eit_vector[191] = 0;
 #endif
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 24c5dee91768..d2be3ffca280 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1763,6 +1763,7 @@ config SMP
        bool "Multi-Processing support"
        depends on SYS_SUPPORTS_SMP
        select IRQ_PER_CPU
+        select USE_GENERIC_SMP_HELPERS
        help
          This enables support for systems with more than one CPU. If you have
          a system with only one CPU, like most personal computers, say N. If
diff --git a/arch/mips/kernel/irq-rm9000.c b/arch/mips/kernel/irq-rm9000.c
index ed9febe63d72..b47e4615ec12 100644
--- a/arch/mips/kernel/irq-rm9000.c
+++ b/arch/mips/kernel/irq-rm9000.c
@@ -49,7 +49,7 @@ static void local_rm9k_perfcounter_irq_startup(void *args)
 static unsigned int rm9k_perfcounter_irq_startup(unsigned int irq)
 {
-        on_each_cpu(local_rm9k_perfcounter_irq_startup, (void *) irq, 0, 1);
+        on_each_cpu(local_rm9k_perfcounter_irq_startup, (void *) irq, 1);
        return 0;
 }
@@ -66,7 +66,7 @@ static void local_rm9k_perfcounter_irq_shutdown(void *args)
 static void rm9k_perfcounter_irq_shutdown(unsigned int irq)
 {
-        on_each_cpu(local_rm9k_perfcounter_irq_shutdown, (void *) irq, 0, 1);
+        on_each_cpu(local_rm9k_perfcounter_irq_shutdown, (void *) irq, 1);
 }
 static struct irq_chip rm9k_irq_controller = {
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index cdf87a9dd4ba..4410f172b8ab 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -131,148 +131,29 @@ asmlinkage __cpuinit void start_secondary(void)
        cpu_idle();
 }
-DEFINE_SPINLOCK(smp_call_lock);
+void arch_send_call_function_ipi(cpumask_t mask)
-struct call_data_struct *call_data;
-/*
- * Run a function on all other CPUs.
- *
- *  <mask>      cpuset_t of all processors to run the function on.
- *  <func>      The function to run. This must be fast and non-blocking.
- *  <info>      An arbitrary pointer to pass to the function.
- *  <retry>     If true, keep retrying until ready.
- *  <wait>      If true, wait until function has completed on other CPUs.
- *  [RETURNS]   0 on success, else a negative status code.
- *
- * Does not return until remote CPUs are nearly ready to execute <func>
- * or are or have executed.
- *
- * You must not call this function with disabled interrupts or from a
- * hardware interrupt handler or from a bottom half handler:
- *
- * CPU A                               CPU B
- * Disable interrupts
- *                                     smp_call_function()
- *                                     Take call_lock
- *                                     Send IPIs
- *                                     Wait for all cpus to acknowledge IPI
- *                                     CPU A has not responded, spin waiting
- *                                     for cpu A to respond, holding call_lock
- * smp_call_function()
- * Spin waiting for call_lock
- * Deadlock                            Deadlock
- */
-int smp_call_function_mask(cpumask_t mask, void (*func) (void *info),
-        void *info, int retry, int wait)
 {
-        struct call_data_struct data;
-        int cpu = smp_processor_id();
-        int cpus;
-        /*
-         * Can die spectacularly if this CPU isn't yet marked online
-         */
-        BUG_ON(!cpu_online(cpu));
-        cpu_clear(cpu, mask);
-        cpus = cpus_weight(mask);
-        if (!cpus)
-                return 0;
-        /* Can deadlock when called with interrupts disabled */
-        WARN_ON(irqs_disabled());
-        data.func = func;
-        data.info = info;
-        atomic_set(&data.started, 0);
-        data.wait = wait;
-        if (wait)
-                atomic_set(&data.finished, 0);
-        spin_lock(&smp_call_lock);
-        call_data = &data;
-        smp_mb();
-        /* Send a message to all other CPUs and wait for them to respond */
        mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
-        /* Wait for response */
-        /* FIXME: lock-up detection, backtrace on lock-up */
-        while (atomic_read(&data.started) != cpus)
-                barrier();
-        if (wait)
-                while (atomic_read(&data.finished) != cpus)
-                        barrier();
-        call_data = NULL;
-        spin_unlock(&smp_call_lock);
-        return 0;
 }
-int smp_call_function(void (*func) (void *info), void *info, int retry,
+/*
-        int wait)
+ * We reuse the same vector for the single IPI
+ */
+void arch_send_call_function_single_ipi(int cpu)
 {
-        return smp_call_function_mask(cpu_online_map, func, info, retry, wait);
+        mp_ops->send_ipi_mask(cpumask_of_cpu(cpu), SMP_CALL_FUNCTION);
 }
-EXPORT_SYMBOL(smp_call_function);
+/*
+ * Call into both interrupt handlers, as we share the IPI for them
+ */
 void smp_call_function_interrupt(void)
 {
-        void (*func) (void *info) = call_data->func;
-        void *info = call_data->info;
-        int wait = call_data->wait;
-        /*
-         * Notify initiating CPU that I've grabbed the data and am
-         * about to execute the function.
-         */
-        smp_mb();
-        atomic_inc(&call_data->started);
-        /*
-         * At this point the info structure may be out of scope unless wait==1.
-         */
        irq_enter();
-        (*func)(info);
+        generic_smp_call_function_single_interrupt();
+        generic_smp_call_function_interrupt();
        irq_exit();
-        if (wait) {
-                smp_mb();
-                atomic_inc(&call_data->finished);
-        }
-}
-int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
-                             int retry, int wait)
-{
-        int ret, me;
-        /*
-         * Can die spectacularly if this CPU isn't yet marked online
-         */
-        if (!cpu_online(cpu))
-                return 0;
-        me = get_cpu();
-        BUG_ON(!cpu_online(me));
-        if (cpu == me) {
-                local_irq_disable();
-                func(info);
-                local_irq_enable();
-                put_cpu();
-                return 0;
-        }
-        ret = smp_call_function_mask(cpumask_of_cpu(cpu), func, info, retry,
-                                     wait);
-        put_cpu();
-        return 0;
 }
-EXPORT_SYMBOL(smp_call_function_single);
 static void stop_this_cpu(void *dummy)
 {
@@ -286,7 +167,7 @@ static void stop_this_cpu(void *dummy)
 void smp_send_stop(void)
 {
-        smp_call_function(stop_this_cpu, NULL, 1, 0);
+        smp_call_function(stop_this_cpu, NULL, 0);
 }
 void __init smp_cpus_done(unsigned int max_cpus)
@@ -365,7 +246,7 @@ static void flush_tlb_all_ipi(void *info)
 void flush_tlb_all(void)
 {
-        on_each_cpu(flush_tlb_all_ipi, NULL, 1, 1);
+        on_each_cpu(flush_tlb_all_ipi, NULL, 1);
 }
 static void flush_tlb_mm_ipi(void *mm)
@@ -385,7 +266,7 @@ static void flush_tlb_mm_ipi(void *mm)
 static inline void smp_on_other_tlbs(void (*func) (void *info), void *info)
 {
 #ifndef CONFIG_MIPS_MT_SMTC
-        smp_call_function(func, info, 1, 1);
+        smp_call_function(func, info, 1);
 #endif
 }
@@ -485,7 +366,7 @@ void flush_tlb_kernel_range(unsigned long start, unsigned long end)
                .addr2 = end,
        };
-        on_each_cpu(flush_tlb_kernel_range_ipi, &fd, 1, 1);
+        on_each_cpu(flush_tlb_kernel_range_ipi, &fd, 1);
 }
 static void flush_tlb_page_ipi(void *info)
diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c
index 3e863186cd22..a516286532ab 100644
--- a/arch/mips/kernel/smtc.c
+++ b/arch/mips/kernel/smtc.c
@@ -877,7 +877,6 @@ static void ipi_resched_interrupt(void)
        /* Return from interrupt should be enough to cause scheduler check */
 }
 static void ipi_call_interrupt(void)
 {
        /* Invoke generic function invocation code in smp.c */
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 27096751ddce..71df3390c07b 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -43,12 +43,12 @@
 *    primary cache.
 */
 static inline void r4k_on_each_cpu(void (*func) (void *info), void *info,
-                                   int retry, int wait)
+                                   int wait)
 {
        preempt_disable();
 #if !defined(CONFIG_MIPS_MT_SMP) && !defined(CONFIG_MIPS_MT_SMTC)
-        smp_call_function(func, info, retry, wait);
+        smp_call_function(func, info, wait);
 #endif
        func(info);
        preempt_enable();
@@ -350,7 +350,7 @@ static inline void local_r4k___flush_cache_all(void * args)
 static void r4k___flush_cache_all(void)
 {
-        r4k_on_each_cpu(local_r4k___flush_cache_all, NULL, 1, 1);
+        r4k_on_each_cpu(local_r4k___flush_cache_all, NULL, 1);
 }
 static inline int has_valid_asid(const struct mm_struct *mm)
@@ -397,7 +397,7 @@ static void r4k_flush_cache_range(struct vm_area_struct *vma,
        int exec = vma->vm_flags & VM_EXEC;
        if (cpu_has_dc_aliases || (exec && !cpu_has_ic_fills_f_dc))
-                r4k_on_each_cpu(local_r4k_flush_cache_range, vma, 1, 1);
+                r4k_on_each_cpu(local_r4k_flush_cache_range, vma, 1);
 }
 static inline void local_r4k_flush_cache_mm(void * args)
@@ -429,7 +429,7 @@ static void r4k_flush_cache_mm(struct mm_struct *mm)
        if (!cpu_has_dc_aliases)
                return;
-        r4k_on_each_cpu(local_r4k_flush_cache_mm, mm, 1, 1);
+        r4k_on_each_cpu(local_r4k_flush_cache_mm, mm, 1);
 }
 struct flush_cache_page_args {
@@ -521,7 +521,7 @@ static void r4k_flush_cache_page(struct vm_area_struct *vma,
        args.addr = addr;
        args.pfn = pfn;
-        r4k_on_each_cpu(local_r4k_flush_cache_page, &args, 1, 1);
+        r4k_on_each_cpu(local_r4k_flush_cache_page, &args, 1);
 }
 static inline void local_r4k_flush_data_cache_page(void * addr)
@@ -535,7 +535,7 @@ static void r4k_flush_data_cache_page(unsigned long addr)
                local_r4k_flush_data_cache_page((void *)addr);
        else
                r4k_on_each_cpu(local_r4k_flush_data_cache_page, (void *) addr,
-                                1, 1);
+                                1);
 }
 struct flush_icache_range_args {
@@ -571,7 +571,7 @@ static void r4k_flush_icache_range(unsigned long start, unsigned long end)
        args.start = start;
        args.end = end;
-        r4k_on_each_cpu(local_r4k_flush_icache_range, &args, 1, 1);
+        r4k_on_each_cpu(local_r4k_flush_icache_range, &args, 1);
        instruction_hazard();
 }
@@ -672,7 +672,7 @@ static void local_r4k_flush_cache_sigtramp(void * arg)
 static void r4k_flush_cache_sigtramp(unsigned long addr)
 {
-        r4k_on_each_cpu(local_r4k_flush_cache_sigtramp, (void *) addr, 1, 1);
+        r4k_on_each_cpu(local_r4k_flush_cache_sigtramp, (void *) addr, 1);
 }
 static void r4k_flush_icache_all(void)
diff --git a/arch/mips/oprofile/common.c b/arch/mips/oprofile/common.c
index b5f6f71b27bc..dd2fbd6645c1 100644
--- a/arch/mips/oprofile/common.c
+++ b/arch/mips/oprofile/common.c
@@ -27,7 +27,7 @@ static int op_mips_setup(void)
        model->reg_setup(ctr);
        /* Configure the registers on all cpus.  */
-        on_each_cpu(model->cpu_setup, NULL, 0, 1);
+        on_each_cpu(model->cpu_setup, NULL, 1);
        return 0;
 }
@@ -58,7 +58,7 @@ static int op_mips_create_files(struct super_block * sb, struct dentry * root)
 static int op_mips_start(void)
 {
-        on_each_cpu(model->cpu_start, NULL, 0, 1);
+        on_each_cpu(model->cpu_start, NULL, 1);
        return 0;
 }
@@ -66,7 +66,7 @@ static int op_mips_start(void)
 static void op_mips_stop(void)
 {
        /* Disable performance monitoring for all counters.  */
-        on_each_cpu(model->cpu_stop, NULL, 0, 1);
+        on_each_cpu(model->cpu_stop, NULL, 1);
 }
 int __init oprofile_arch_init(struct oprofile_operations *ops)
diff --git a/arch/mips/oprofile/op_model_mipsxx.c b/arch/mips/oprofile/op_model_mipsxx.c
index b40df7d2cf44..54759f1669d3 100644
--- a/arch/mips/oprofile/op_model_mipsxx.c
+++ b/arch/mips/oprofile/op_model_mipsxx.c
@@ -313,7 +313,7 @@ static int __init mipsxx_init(void)
        if (!cpu_has_mipsmt_pertccounters)
                counters = counters_total_to_per_cpu(counters);
 #endif
-        on_each_cpu(reset_counters, (void *)(long)counters, 0, 1);
+        on_each_cpu(reset_counters, (void *)(long)counters, 1);
        op_model_mipsxx_ops.num_counters = counters;
        switch (current_cpu_type()) {
@@ -382,7 +382,7 @@ static void mipsxx_exit(void)
        int counters = op_model_mipsxx_ops.num_counters;
        counters = counters_per_cpu_to_total(counters);
-        on_each_cpu(reset_counters, (void *)(long)counters, 0, 1);
+        on_each_cpu(reset_counters, (void *)(long)counters, 1);
        perf_irq = save_perf_irq;
 }
diff --git a/arch/mips/pmc-sierra/yosemite/prom.c b/arch/mips/pmc-sierra/yosemite/prom.c
index 35dc435846a6..cf4c868715ac 100644
--- a/arch/mips/pmc-sierra/yosemite/prom.c
+++ b/arch/mips/pmc-sierra/yosemite/prom.c
@@ -64,7 +64,7 @@ static void prom_exit(void)
 #ifdef CONFIG_SMP
        if (smp_processor_id())
                /* CPU 1 */
-                smp_call_function(prom_cpu0_exit, NULL, 1, 1);
+                smp_call_function(prom_cpu0_exit, NULL, 1);
 #endif
        prom_cpu0_exit(NULL);
 }
diff --git a/arch/mips/sibyte/cfe/setup.c b/arch/mips/sibyte/cfe/setup.c
index 33fce826f8bf..fd9604d5555a 100644
--- a/arch/mips/sibyte/cfe/setup.c
+++ b/arch/mips/sibyte/cfe/setup.c
@@ -74,7 +74,7 @@ static void __noreturn cfe_linux_exit(void *arg)
                if (!reboot_smp) {
                        /* Get CPU 0 to do the cfe_exit */
                        reboot_smp = 1;
-                        smp_call_function(cfe_linux_exit, arg, 1, 0);
+                        smp_call_function(cfe_linux_exit, arg, 0);
                }
        } else {
                printk("Passing control back to CFE...\n");
diff --git a/arch/mips/sibyte/sb1250/prom.c b/arch/mips/sibyte/sb1250/prom.c
index cf8f6b3de86c..65b1af66b674 100644
--- a/arch/mips/sibyte/sb1250/prom.c
+++ b/arch/mips/sibyte/sb1250/prom.c
@@ -66,7 +66,7 @@ static void prom_linux_exit(void)
 {
 #ifdef CONFIG_SMP
        if (smp_processor_id()) {
-                smp_call_function(prom_cpu0_exit, NULL, 1, 1);
+                smp_call_function(prom_cpu0_exit, NULL, 1);
        }
 #endif
        while(1);
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index bc7a19da6245..a7d4fd353c2b 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -199,6 +199,7 @@ endchoice
 config SMP
        bool "Symmetric multi-processing support"
+        select USE_GENERIC_SMP_HELPERS
        ---help---
          This enables support for systems with more than one CPU. If you have
          a system with only one CPU, like most personal computers, say N. If
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index e10d25d2d9c9..5259d8c20676 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -51,12 +51,12 @@ static struct pdc_btlb_info btlb_info __read_mostly;
 void
 flush_data_cache(void)
 {
-        on_each_cpu(flush_data_cache_local, NULL, 1, 1);
+        on_each_cpu(flush_data_cache_local, NULL, 1);
 }
 void 
 flush_instruction_cache(void)
 {
-        on_each_cpu(flush_instruction_cache_local, NULL, 1, 1);
+        on_each_cpu(flush_instruction_cache_local, NULL, 1);
 }
 #endif
@@ -515,7 +515,7 @@ static void cacheflush_h_tmp_function(void *dummy)
 void flush_cache_all(void)
 {
-        on_each_cpu(cacheflush_h_tmp_function, NULL, 1, 1);
+        on_each_cpu(cacheflush_h_tmp_function, NULL, 1);
 }
 void flush_cache_mm(struct mm_struct *mm)
diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index 85fc7754ec25..d47f3975c9c6 100644
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -84,19 +84,11 @@ EXPORT_SYMBOL(cpu_possible_map);
 DEFINE_PER_CPU(spinlock_t, ipi_lock) = SPIN_LOCK_UNLOCKED;
-struct smp_call_struct {
-        void (*func) (void *info);
-        void *info;
-        long wait;
-        atomic_t unstarted_count;
-        atomic_t unfinished_count;
-};
-static volatile struct smp_call_struct *smp_call_function_data;
 enum ipi_message_type {
        IPI_NOP=0,
        IPI_RESCHEDULE=1,
        IPI_CALL_FUNC,
+        IPI_CALL_FUNC_SINGLE,
        IPI_CPU_START,
        IPI_CPU_STOP,
        IPI_CPU_TEST
@@ -187,33 +179,12 @@ ipi_interrupt(int irq, void *dev_id)
                        case IPI_CALL_FUNC:
                                smp_debug(100, KERN_DEBUG "CPU%d IPI_CALL_FUNC\n", this_cpu);
-                                {
+                                generic_smp_call_function_interrupt();
-                                        volatile struct smp_call_struct *data;
+                                break;
-                                        void (*func)(void *info);
-                                        void *info;
+                        case IPI_CALL_FUNC_SINGLE:
-                                        int wait;
+                                smp_debug(100, KERN_DEBUG "CPU%d IPI_CALL_FUNC_SINGLE\n", this_cpu);
+                                generic_smp_call_function_single_interrupt();
-                                        data = smp_call_function_data;
-                                        func = data->func;
-                                        info = data->info;
-                                        wait = data->wait;
-                                        mb();
-                                        atomic_dec ((atomic_t *)&data->unstarted_count);
-                                        /* At this point, *data can't
-                                         * be relied upon.
-                                         */
-                                        (*func)(info);
-                                        /* Notify the sending CPU that the
-                                         * task is done.
-                                         */
-                                        mb();
-                                        if (wait)
-                                                atomic_dec ((atomic_t *)&data->unfinished_count);
-                                }
                                break;
                        case IPI_CPU_START:
@@ -256,6 +227,14 @@ ipi_send(int cpu, enum ipi_message_type op)
        spin_unlock_irqrestore(lock, flags);
 }
+static void
+send_IPI_mask(cpumask_t mask, enum ipi_message_type op)
+{
+        int cpu;
+        for_each_cpu_mask(cpu, mask)
+                ipi_send(cpu, op);
+}
 static inline void
 send_IPI_single(int dest_cpu, enum ipi_message_type op)
@@ -295,86 +274,15 @@ smp_send_all_nop(void)
        send_IPI_allbutself(IPI_NOP);
 }
+void arch_send_call_function_ipi(cpumask_t mask)
-/**
- * Run a function on all other CPUs.
- *  <func>      The function to run. This must be fast and non-blocking.
- *  <info>      An arbitrary pointer to pass to the function.
- *  <retry>     If true, keep retrying until ready.
- *  <wait>      If true, wait until function has completed on other CPUs.
- *  [RETURNS]   0 on success, else a negative status code.
- *
- * Does not return until remote CPUs are nearly ready to execute <func>
- * or have executed.
- */
-int
-smp_call_function (void (*func) (void *info), void *info, int retry, int wait)
 {
-        struct smp_call_struct data;
+        send_IPI_mask(mask, IPI_CALL_FUNC);
-        unsigned long timeout;
-        static DEFINE_SPINLOCK(lock);
-        int retries = 0;
-        if (num_online_cpus() < 2)
-                return 0;
-        /* Can deadlock when called with interrupts disabled */
-        WARN_ON(irqs_disabled());
-        /* can also deadlock if IPIs are disabled */
-        WARN_ON((get_eiem() & (1UL<<(CPU_IRQ_MAX - IPI_IRQ))) == 0);
-        
-        data.func = func;
-        data.info = info;
-        data.wait = wait;
-        atomic_set(&data.unstarted_count, num_online_cpus() - 1);
-        atomic_set(&data.unfinished_count, num_online_cpus() - 1);
-        if (retry) {
-                spin_lock (&lock);
-                while (smp_call_function_data != 0)
-                        barrier();
-        }
-        else {
-                spin_lock (&lock);
-                if (smp_call_function_data) {
-                        spin_unlock (&lock);
-                        return -EBUSY;
-                }
-        }
-        smp_call_function_data = &data;
-        spin_unlock (&lock);
-        
-        /*  Send a message to all other CPUs and wait for them to respond  */
-        send_IPI_allbutself(IPI_CALL_FUNC);
- retry:
-        /*  Wait for response  */
-        timeout = jiffies + HZ;
-        while ( (atomic_read (&data.unstarted_count) > 0) &&
-                time_before (jiffies, timeout) )
-                barrier ();
-        if (atomic_read (&data.unstarted_count) > 0) {
-                printk(KERN_CRIT "SMP CALL FUNCTION TIMED OUT! (cpu=%d), try %d\n",
-                      smp_processor_id(), ++retries);
-                goto retry;
-        }
-        /* We either got one or timed out. Release the lock */
-        mb();
-        smp_call_function_data = NULL;
-        while (wait && atomic_read (&data.unfinished_count) > 0)
-                        barrier ();
-        return 0;
 }
-EXPORT_SYMBOL(smp_call_function);
+void arch_send_call_function_single_ipi(int cpu)
+{
+        send_IPI_single(cpu, IPI_CALL_FUNC_SINGLE);
+}
 /*
 * Flush all other CPU's tlb and then mine.  Do this with on_each_cpu()
@@ -384,7 +292,7 @@ EXPORT_SYMBOL(smp_call_function);
 void
 smp_flush_tlb_all(void)
 {
-        on_each_cpu(flush_tlb_all_local, NULL, 1, 1);
+        on_each_cpu(flush_tlb_all_local, NULL, 1);
 }
 /*
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index ce0da689a89d..b4d6c8777ed0 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -1053,7 +1053,7 @@ void flush_tlb_all(void)
            do_recycle++;
        }
        spin_unlock(&sid_lock);
-        on_each_cpu(flush_tlb_all_local, NULL, 1, 1);
+        on_each_cpu(flush_tlb_all_local, NULL, 1);
        if (do_recycle) {
            spin_lock(&sid_lock);
            recycle_sids(recycle_ndirty,recycle_dirty_array);
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index a5e9912e2d37..20eacf2a8424 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -111,6 +111,7 @@ config PPC
        select HAVE_KPROBES
        select HAVE_KRETPROBES
        select HAVE_LMB
+        select USE_GENERIC_SMP_HELPERS if SMP
        select HAVE_OPROFILE
 config EARLY_PRINTK
diff --git a/arch/powerpc/kernel/machine_kexec_64.c b/arch/powerpc/kernel/machine_kexec_64.c
index 704375bda73a..b732b5f8e356 100644
--- a/arch/powerpc/kernel/machine_kexec_64.c
+++ b/arch/powerpc/kernel/machine_kexec_64.c
@@ -172,7 +172,7 @@ static void kexec_prepare_cpus(void)
 {
        int my_cpu, i, notified=-1;
-        smp_call_function(kexec_smp_down, NULL, 0, /* wait */0);
+        smp_call_function(kexec_smp_down, NULL, /* wait */0);
        my_cpu = get_cpu();
        /* check the others cpus are now down (via paca hw cpu id == -1) */
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 34843c318419..647f3e8677dc 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -747,7 +747,7 @@ static int rtas_ibm_suspend_me(struct rtas_args *args)
        /* Call function on all CPUs.  One of us will make the
         * rtas call
         */
-        if (on_each_cpu(rtas_percpu_suspend_me, &data, 1, 0))
+        if (on_each_cpu(rtas_percpu_suspend_me, &data, 0))
                data.error = -EINVAL;
        wait_for_completion(&done);
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 1457aa0a08f1..5191b46a611e 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -72,12 +72,8 @@ struct smp_ops_t *smp_ops;
 static volatile unsigned int cpu_callin_map[NR_CPUS];
-void smp_call_function_interrupt(void);
 int smt_enabled_at_boot = 1;
-static int ipi_fail_ok;
 static void (*crash_ipi_function_ptr)(struct pt_regs *) = NULL;
 #ifdef CONFIG_PPC64
@@ -99,12 +95,15 @@ void smp_message_recv(int msg)
 {
        switch(msg) {
        case PPC_MSG_CALL_FUNCTION:
-                smp_call_function_interrupt();
+                generic_smp_call_function_interrupt();
                break;
        case PPC_MSG_RESCHEDULE:
                /* XXX Do we have to do this? */
                set_need_resched();
                break;
+        case PPC_MSG_CALL_FUNC_SINGLE:
+                generic_smp_call_function_single_interrupt();
+                break;
        case PPC_MSG_DEBUGGER_BREAK:
                if (crash_ipi_function_ptr) {
                        crash_ipi_function_ptr(get_irq_regs());
@@ -128,6 +127,19 @@ void smp_send_reschedule(int cpu)
                smp_ops->message_pass(cpu, PPC_MSG_RESCHEDULE);
 }
+void arch_send_call_function_single_ipi(int cpu)
+{
+        smp_ops->message_pass(cpu, PPC_MSG_CALL_FUNC_SINGLE);
+}
+void arch_send_call_function_ipi(cpumask_t mask)
+{
+        unsigned int cpu;
+        for_each_cpu_mask(cpu, mask)
+                smp_ops->message_pass(cpu, PPC_MSG_CALL_FUNCTION);
+}
 #ifdef CONFIG_DEBUGGER
 void smp_send_debugger_break(int cpu)
 {
@@ -154,215 +166,9 @@ static void stop_this_cpu(void *dummy)
                ;
 }
-/*
- * Structure and data for smp_call_function(). This is designed to minimise
- * static memory requirements. It also looks cleaner.
- * Stolen from the i386 version.
- */
-static  __cacheline_aligned_in_smp DEFINE_SPINLOCK(call_lock);
-static struct call_data_struct {
-        void (*func) (void *info);
-        void *info;
-        atomic_t started;
-        atomic_t finished;
-        int wait;
-} *call_data;
-/* delay of at least 8 seconds */
-#define SMP_CALL_TIMEOUT        8
-/*
- * These functions send a 'generic call function' IPI to other online
- * CPUS in the system.
- *
- * [SUMMARY] Run a function on other CPUs.
- * <func> The function to run. This must be fast and non-blocking.
- * <info> An arbitrary pointer to pass to the function.
- * <nonatomic> currently unused.
- * <wait> If true, wait (atomically) until function has completed on other CPUs.
- * [RETURNS] 0 on success, else a negative status code. Does not return until
- * remote CPUs are nearly ready to execute <<func>> or are or have executed.
- * <map> is a cpu map of the cpus to send IPI to.
- *
- * You must not call this function with disabled interrupts or from a
- * hardware interrupt handler or from a bottom half handler.
- */
-static int __smp_call_function_map(void (*func) (void *info), void *info,
-                                   int nonatomic, int wait, cpumask_t map)
-{
-        struct call_data_struct data;
-        int ret = -1, num_cpus;
-        int cpu;
-        u64 timeout;
-        if (unlikely(smp_ops == NULL))
-                return ret;
-        data.func = func;
-        data.info = info;
-        atomic_set(&data.started, 0);
-        data.wait = wait;
-        if (wait)
-                atomic_set(&data.finished, 0);
-        /* remove 'self' from the map */
-        if (cpu_isset(smp_processor_id(), map))
-                cpu_clear(smp_processor_id(), map);
-        /* sanity check the map, remove any non-online processors. */
-        cpus_and(map, map, cpu_online_map);
-        num_cpus = cpus_weight(map);
-        if (!num_cpus)
-                goto done;
-        call_data = &data;
-        smp_wmb();
-        /* Send a message to all CPUs in the map */
-        for_each_cpu_mask(cpu, map)
-                smp_ops->message_pass(cpu, PPC_MSG_CALL_FUNCTION);
-        timeout = get_tb() + (u64) SMP_CALL_TIMEOUT * tb_ticks_per_sec;
-        /* Wait for indication that they have received the message */
-        while (atomic_read(&data.started) != num_cpus) {
-                HMT_low();
-                if (get_tb() >= timeout) {
-                        printk("smp_call_function on cpu %d: other cpus not "
-                                "responding (%d)\n", smp_processor_id(),
-                                atomic_read(&data.started));
-                        if (!ipi_fail_ok)
-                                debugger(NULL);
-                        goto out;
-                }
-        }
-        /* optionally wait for the CPUs to complete */
-        if (wait) {
-                while (atomic_read(&data.finished) != num_cpus) {
-                        HMT_low();
-                        if (get_tb() >= timeout) {
-                                printk("smp_call_function on cpu %d: other "
-                                        "cpus not finishing (%d/%d)\n",
-                                        smp_processor_id(),
-                                        atomic_read(&data.finished),
-                                        atomic_read(&data.started));
-                                debugger(NULL);
-                                goto out;
-                        }
-                }
-        }
- done:
-        ret = 0;
- out:
-        call_data = NULL;
-        HMT_medium();
-        return ret;
-}
-static int __smp_call_function(void (*func)(void *info), void *info,
-                               int nonatomic, int wait)
-{
-        int ret;
-        spin_lock(&call_lock);
-        ret =__smp_call_function_map(func, info, nonatomic, wait,
-                                       cpu_online_map);
-        spin_unlock(&call_lock);
-        return ret;
-}
-int smp_call_function(void (*func) (void *info), void *info, int nonatomic,
-                        int wait)
-{
-        /* Can deadlock when called with interrupts disabled */
-        WARN_ON(irqs_disabled());
-        return __smp_call_function(func, info, nonatomic, wait);
-}
-EXPORT_SYMBOL(smp_call_function);
-int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
-                             int nonatomic, int wait)
-{
-        cpumask_t map = CPU_MASK_NONE;
-        int ret = 0;
-        /* Can deadlock when called with interrupts disabled */
-        WARN_ON(irqs_disabled());
-        if (!cpu_online(cpu))
-                return -EINVAL;
-        cpu_set(cpu, map);
-        if (cpu != get_cpu()) {
-                spin_lock(&call_lock);
-                ret = __smp_call_function_map(func, info, nonatomic, wait, map);
-                spin_unlock(&call_lock);
-        } else {
-                local_irq_disable();
-                func(info);
-                local_irq_enable();
-        }
-        put_cpu();
-        return ret;
-}
-EXPORT_SYMBOL(smp_call_function_single);
 void smp_send_stop(void)
 {
-        int nolock;
+        smp_call_function(stop_this_cpu, NULL, 0);
-        /* It's OK to fail sending the IPI, since the alternative is to
-         * be stuck forever waiting on the other CPU to take the interrupt.
-         *
-         * It's better to at least continue and go through reboot, since this
-         * function is usually called at panic or reboot time in the first
-         * place.
-         */
-        ipi_fail_ok = 1;
-        /* Don't deadlock in case we got called through panic */
-        nolock = !spin_trylock(&call_lock);
-        __smp_call_function_map(stop_this_cpu, NULL, 1, 0, cpu_online_map);
-        if (!nolock)
-                spin_unlock(&call_lock);
-}
-void smp_call_function_interrupt(void)
-{
-        void (*func) (void *info);
-        void *info;
-        int wait;
-        /* call_data will be NULL if the sender timed out while
-         * waiting on us to receive the call.
-         */
-        if (!call_data)
-                return;
-        func = call_data->func;
-        info = call_data->info;
-        wait = call_data->wait;
-        if (!wait)
-                smp_mb__before_atomic_inc();
-        /*
-         * Notify initiating CPU that I've grabbed the data and am
-         * about to execute the function
-         */
-        atomic_inc(&call_data->started);
-        /*
-         * At this point the info structure may be out of scope unless wait==1
-         */
-        (*func)(info);
-        if (wait) {
-                smp_mb__before_atomic_inc();
-                atomic_inc(&call_data->finished);
-        }
 }
 extern struct gettimeofday_struct do_gtod;
@@ -596,9 +402,9 @@ int __devinit start_secondary(void *unused)
        secondary_cpu_time_init();
-        spin_lock(&call_lock);
+        ipi_call_lock();
        cpu_set(cpu, cpu_online_map);
-        spin_unlock(&call_lock);
+        ipi_call_unlock();
        local_irq_enable();
diff --git a/arch/powerpc/kernel/tau_6xx.c b/arch/powerpc/kernel/tau_6xx.c
index 368a4934f7ee..c3a56d65c5a9 100644
--- a/arch/powerpc/kernel/tau_6xx.c
+++ b/arch/powerpc/kernel/tau_6xx.c
@@ -192,7 +192,7 @@ static void tau_timeout_smp(unsigned long unused)
        /* schedule ourselves to be run again */
        mod_timer(&tau_timer, jiffies + shrink_timer) ;
-        on_each_cpu(tau_timeout, NULL, 1, 0);
+        on_each_cpu(tau_timeout, NULL, 0);
 }
 /*
@@ -234,7 +234,7 @@ int __init TAU_init(void)
        tau_timer.expires = jiffies + shrink_timer;
        add_timer(&tau_timer);
-        on_each_cpu(TAU_init_smp, NULL, 1, 0);
+        on_each_cpu(TAU_init_smp, NULL, 0);
        printk("Thermal assist unit ");
 #ifdef CONFIG_TAU_INT
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 73401e83739a..f1a38a6c1e2d 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -322,7 +322,7 @@ void snapshot_timebases(void)
 {
        if (!cpu_has_feature(CPU_FTR_PURR))
                return;
-        on_each_cpu(snapshot_tb_and_purr, NULL, 0, 1);
+        on_each_cpu(snapshot_tb_and_purr, NULL, 1);
 }
 /*
diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/slice.c
index ad928edafb0a..2bd12d965db1 100644
--- a/arch/powerpc/mm/slice.c
+++ b/arch/powerpc/mm/slice.c
@@ -218,7 +218,7 @@ static void slice_convert(struct mm_struct *mm, struct slice_mask mask, int psiz
        mb();
        /* XXX this is sub-optimal but will do for now */
-        on_each_cpu(slice_flush_segments, mm, 0, 1);
+        on_each_cpu(slice_flush_segments, mm, 1);
 #ifdef CONFIG_SPU_BASE
        spu_flush_all_slbs(mm);
 #endif
diff --git a/arch/powerpc/mm/tlb_64.c b/arch/powerpc/mm/tlb_64.c
index e2d867ce1c7e..69ad829a7fa3 100644
--- a/arch/powerpc/mm/tlb_64.c
+++ b/arch/powerpc/mm/tlb_64.c
@@ -66,7 +66,7 @@ static void pgtable_free_now(pgtable_free_t pgf)
 {
        pte_freelist_forced_free++;
-        smp_call_function(pte_free_smp_sync, NULL, 0, 1);
+        smp_call_function(pte_free_smp_sync, NULL, 1);
        pgtable_free(pgf);
 }
diff --git a/arch/powerpc/oprofile/common.c b/arch/powerpc/oprofile/common.c
index 4908dc98f9ca..17807acb05d9 100644
--- a/arch/powerpc/oprofile/common.c
+++ b/arch/powerpc/oprofile/common.c
@@ -65,7 +65,7 @@ static int op_powerpc_setup(void)
        /* Configure the registers on all cpus.  If an error occurs on one
         * of the cpus, op_per_cpu_rc will be set to the error */
-        on_each_cpu(op_powerpc_cpu_setup, NULL, 0, 1);
+        on_each_cpu(op_powerpc_cpu_setup, NULL, 1);
 out:    if (op_per_cpu_rc) {
                /* error on setup release the performance counter hardware */
@@ -100,7 +100,7 @@ static int op_powerpc_start(void)
        if (model->global_start)
                return model->global_start(ctr);
        if (model->start) {
-                on_each_cpu(op_powerpc_cpu_start, NULL, 0, 1);
+                on_each_cpu(op_powerpc_cpu_start, NULL, 1);
                return op_per_cpu_rc;
        }
        return -EIO; /* No start function is defined for this
@@ -115,7 +115,7 @@ static inline void op_powerpc_cpu_stop(void *dummy)
 static void op_powerpc_stop(void)
 {
        if (model->stop)
-                on_each_cpu(op_powerpc_cpu_stop, NULL, 0, 1);
+                on_each_cpu(op_powerpc_cpu_stop, NULL, 1);
        if (model->global_stop)
                model->global_stop();
 }
diff --git a/arch/powerpc/platforms/cell/interrupt.c b/arch/powerpc/platforms/cell/interrupt.c
index 5bf7df146022..2d5bb22d6c09 100644
--- a/arch/powerpc/platforms/cell/interrupt.c
+++ b/arch/powerpc/platforms/cell/interrupt.c
@@ -218,6 +218,7 @@ void iic_request_IPIs(void)
 {
        iic_request_ipi(PPC_MSG_CALL_FUNCTION, "IPI-call");
        iic_request_ipi(PPC_MSG_RESCHEDULE, "IPI-resched");
+        iic_request_ipi(PPC_MSG_CALL_FUNC_SINGLE, "IPI-call-single");
 #ifdef CONFIG_DEBUGGER
        iic_request_ipi(PPC_MSG_DEBUGGER_BREAK, "IPI-debug");
 #endif /* CONFIG_DEBUGGER */
diff --git a/arch/powerpc/platforms/ps3/smp.c b/arch/powerpc/platforms/ps3/smp.c
index f0b12f212363..a0927a3bacb7 100644
--- a/arch/powerpc/platforms/ps3/smp.c
+++ b/arch/powerpc/platforms/ps3/smp.c
@@ -105,9 +105,10 @@ static void __init ps3_smp_setup_cpu(int cpu)
         * to index needs to be setup.
         */
-        BUILD_BUG_ON(PPC_MSG_CALL_FUNCTION  != 0);
+        BUILD_BUG_ON(PPC_MSG_CALL_FUNCTION    != 0);
-        BUILD_BUG_ON(PPC_MSG_RESCHEDULE     != 1);
+        BUILD_BUG_ON(PPC_MSG_RESCHEDULE       != 1);
-        BUILD_BUG_ON(PPC_MSG_DEBUGGER_BREAK != 3);
+        BUILD_BUG_ON(PPC_MSG_CALL_FUNC_SINGLE != 2);
+        BUILD_BUG_ON(PPC_MSG_DEBUGGER_BREAK   != 3);
        for (i = 0; i < MSG_COUNT; i++) {
                result = ps3_event_receive_port_setup(cpu, &virqs[i]);
diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index ebebc28fe895..0fc830f576f5 100644
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -383,13 +383,11 @@ static irqreturn_t xics_ipi_dispatch(int cpu)
                        mb();
                        smp_message_recv(PPC_MSG_RESCHEDULE);
                }
-#if 0
+                if (test_and_clear_bit(PPC_MSG_CALL_FUNC_SINGLE,
-                if (test_and_clear_bit(PPC_MSG_MIGRATE_TASK,
                                       &xics_ipi_message[cpu].value)) {
                        mb();
-                        smp_message_recv(PPC_MSG_MIGRATE_TASK);
+                        smp_message_recv(PPC_MSG_CALL_FUNC_SINGLE);
                }
-#endif
 #if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC)
                if (test_and_clear_bit(PPC_MSG_DEBUGGER_BREAK,
                                       &xics_ipi_message[cpu].value)) {
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 7680001676a6..6c90c95b454e 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -1494,7 +1494,7 @@ void mpic_request_ipis(void)
        static char *ipi_names[] = {
                "IPI0 (call function)",
                "IPI1 (reschedule)",
-                "IPI2 (unused)",
+                "IPI2 (call function single)",
                "IPI3 (debugger break)",
        };
        BUG_ON(mpic == NULL);
diff --git a/arch/ppc/kernel/smp.c b/arch/ppc/kernel/smp.c
index 055998575cb4..bcab0d210e30 100644
--- a/arch/ppc/kernel/smp.c
+++ b/arch/ppc/kernel/smp.c
@@ -152,7 +152,7 @@ static void stop_this_cpu(void *dummy)
 void smp_send_stop(void)
 {
-        smp_call_function(stop_this_cpu, NULL, 1, 0);
+        smp_call_function(stop_this_cpu, NULL, 0);
 }
 /*
diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
index 9cb3d92447a3..a7f8979fb925 100644
--- a/arch/s390/appldata/appldata_base.c
+++ b/arch/s390/appldata/appldata_base.c
@@ -203,7 +203,7 @@ __appldata_vtimer_setup(int cmd)
                        per_cpu(appldata_timer, i).expires = per_cpu_interval;
                        smp_call_function_single(i, add_virt_timer_periodic,
                                                 &per_cpu(appldata_timer, i),
-                                                 0, 1);
+                                                 1);
                }
                appldata_timer_active = 1;
                break;
@@ -228,7 +228,7 @@ __appldata_vtimer_setup(int cmd)
                        args.timer = &per_cpu(appldata_timer, i);
                        args.expires = per_cpu_interval;
                        smp_call_function_single(i, __appldata_mod_vtimer_wrap,
-                                                 &args, 0, 1);
+                                                 &args, 1);
                }
        }
 }
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 5d4fa4b1c74c..b6781030cfbd 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -109,7 +109,7 @@ static void do_call_function(void)
 }
 static void __smp_call_function_map(void (*func) (void *info), void *info,
-                                    int nonatomic, int wait, cpumask_t map)
+                                    int wait, cpumask_t map)
 {
        struct call_data_struct data;
        int cpu, local = 0;
@@ -162,7 +162,6 @@ out:
 * smp_call_function:
 * @func: the function to run; this must be fast and non-blocking
 * @info: an arbitrary pointer to pass to the function
- * @nonatomic: unused
 * @wait: if true, wait (atomically) until function has completed on other CPUs
 *
 * Run a function on all other CPUs.
@@ -170,15 +169,14 @@ out:
 * You must not call this function with disabled interrupts, from a
 * hardware interrupt handler or from a bottom half.
 */
-int smp_call_function(void (*func) (void *info), void *info, int nonatomic,
+int smp_call_function(void (*func) (void *info), void *info, int wait)
-                      int wait)
 {
        cpumask_t map;
        spin_lock(&call_lock);
        map = cpu_online_map;
        cpu_clear(smp_processor_id(), map);
-        __smp_call_function_map(func, info, nonatomic, wait, map);
+        __smp_call_function_map(func, info, wait, map);
        spin_unlock(&call_lock);
        return 0;
 }
@@ -189,7 +187,6 @@ EXPORT_SYMBOL(smp_call_function);
 * @cpu: the CPU where func should run
 * @func: the function to run; this must be fast and non-blocking
 * @info: an arbitrary pointer to pass to the function
- * @nonatomic: unused
 * @wait: if true, wait (atomically) until function has completed on other CPUs
 *
 * Run a function on one processor.
@@ -198,11 +195,10 @@ EXPORT_SYMBOL(smp_call_function);
 * hardware interrupt handler or from a bottom half.
 */
 int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
-                             int nonatomic, int wait)
+                             int wait)
 {
        spin_lock(&call_lock);
-        __smp_call_function_map(func, info, nonatomic, wait,
+        __smp_call_function_map(func, info, wait, cpumask_of_cpu(cpu));
-                                cpumask_of_cpu(cpu));
        spin_unlock(&call_lock);
        return 0;
 }
@@ -228,7 +224,7 @@ int smp_call_function_mask(cpumask_t mask, void (*func)(void *), void *info,
 {
        spin_lock(&call_lock);
        cpu_clear(smp_processor_id(), mask);
-        __smp_call_function_map(func, info, 0, wait, mask);
+        __smp_call_function_map(func, info, wait, mask);
        spin_unlock(&call_lock);
        return 0;
 }
@@ -303,7 +299,7 @@ static void smp_ptlb_callback(void *info)
 void smp_ptlb_all(void)
 {
-        on_each_cpu(smp_ptlb_callback, NULL, 0, 1);
+        on_each_cpu(smp_ptlb_callback, NULL, 1);
 }
 EXPORT_SYMBOL(smp_ptlb_all);
 #endif /* ! CONFIG_64BIT */
@@ -351,7 +347,7 @@ void smp_ctl_set_bit(int cr, int bit)
        memset(&parms.orvals, 0, sizeof(parms.orvals));
        memset(&parms.andvals, 0xff, sizeof(parms.andvals));
        parms.orvals[cr] = 1 << bit;
-        on_each_cpu(smp_ctl_bit_callback, &parms, 0, 1);
+        on_each_cpu(smp_ctl_bit_callback, &parms, 1);
 }
 EXPORT_SYMBOL(smp_ctl_set_bit);
@@ -365,7 +361,7 @@ void smp_ctl_clear_bit(int cr, int bit)
        memset(&parms.orvals, 0, sizeof(parms.orvals));
        memset(&parms.andvals, 0xff, sizeof(parms.andvals));
        parms.andvals[cr] = ~(1L << bit);
-        on_each_cpu(smp_ctl_bit_callback, &parms, 0, 1);
+        on_each_cpu(smp_ctl_bit_callback, &parms, 1);
 }
 EXPORT_SYMBOL(smp_ctl_clear_bit);
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 7418bebb547f..f2cede3947b2 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -707,7 +707,7 @@ static int etr_sync_clock(struct etr_aib *aib, int port)
         */
        memset(&etr_sync, 0, sizeof(etr_sync));
        preempt_disable();
-        smp_call_function(clock_sync_cpu_start, &etr_sync, 0, 0);
+        smp_call_function(clock_sync_cpu_start, &etr_sync, 0);
        local_irq_disable();
        enable_sync_clock();
@@ -746,7 +746,7 @@ static int etr_sync_clock(struct etr_aib *aib, int port)
                rc = -EAGAIN;
        }
        local_irq_enable();
-        smp_call_function(clock_sync_cpu_end, NULL, 0, 0);
+        smp_call_function(clock_sync_cpu_end, NULL, 0);
        preempt_enable();
        return rc;
 }
@@ -926,7 +926,7 @@ static void etr_work_fn(struct work_struct *work)
        if (!eacr.ea) {
                /* Both ports offline. Reset everything. */
                eacr.dp = eacr.es = eacr.sl = 0;
-                on_each_cpu(disable_sync_clock, NULL, 0, 1);
+                on_each_cpu(disable_sync_clock, NULL, 1);
                del_timer_sync(&etr_timer);
                etr_update_eacr(eacr);
                clear_bit(CLOCK_SYNC_ETR, &clock_sync_flags);
@@ -1432,7 +1432,7 @@ static void stp_work_fn(struct work_struct *work)
         */
        memset(&stp_sync, 0, sizeof(stp_sync));
        preempt_disable();
-        smp_call_function(clock_sync_cpu_start, &stp_sync, 0, 0);
+        smp_call_function(clock_sync_cpu_start, &stp_sync, 0);
        local_irq_disable();
        enable_sync_clock();
@@ -1465,7 +1465,7 @@ static void stp_work_fn(struct work_struct *work)
                stp_sync.in_sync = 1;
        local_irq_enable();
-        smp_call_function(clock_sync_cpu_end, NULL, 0, 0);
+        smp_call_function(clock_sync_cpu_end, NULL, 0);
        preempt_enable();
 }
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 9a854c8e5274..3e7384f4619c 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -688,6 +688,7 @@ config CRASH_DUMP
 config SMP
        bool "Symmetric multi-processing support"
        depends on SYS_SUPPORTS_SMP
+        select USE_GENERIC_SMP_HELPERS
        ---help---
          This enables support for systems with more than one CPU. If you have
          a system with only one CPU, like most personal computers, say N. If
diff --git a/arch/sh/kernel/smp.c b/arch/sh/kernel/smp.c
index 5d039d168f57..60c50841143e 100644
--- a/arch/sh/kernel/smp.c
+++ b/arch/sh/kernel/smp.c
@@ -36,13 +36,6 @@ EXPORT_SYMBOL(cpu_possible_map);
 cpumask_t cpu_online_map;
 EXPORT_SYMBOL(cpu_online_map);
-static atomic_t cpus_booted = ATOMIC_INIT(0);
-/*
- * Run specified function on a particular processor.
- */
-void __smp_call_function(unsigned int cpu);
 static inline void __init smp_store_cpu_info(unsigned int cpu)
 {
        struct sh_cpuinfo *c = cpu_data + cpu;
@@ -175,45 +168,20 @@ static void stop_this_cpu(void *unused)
 void smp_send_stop(void)
 {
-        smp_call_function(stop_this_cpu, 0, 1, 0);
+        smp_call_function(stop_this_cpu, 0, 0);
 }
-struct smp_fn_call_struct smp_fn_call = {
+void arch_send_call_function_ipi(cpumask_t mask)
-        .lock           = __SPIN_LOCK_UNLOCKED(smp_fn_call.lock),
-        .finished       = ATOMIC_INIT(0),
-};
-/*
- * The caller of this wants the passed function to run on every cpu.  If wait
- * is set, wait until all cpus have finished the function before returning.
- * The lock is here to protect the call structure.
- * You must not call this function with disabled interrupts or from a
- * hardware interrupt handler or from a bottom half handler.
- */
-int smp_call_function(void (*func)(void *info), void *info, int retry, int wait)
 {
-        unsigned int nr_cpus = atomic_read(&cpus_booted);
+        int cpu;
-        int i;
-        /* Can deadlock when called with interrupts disabled */
-        WARN_ON(irqs_disabled());
-        spin_lock(&smp_fn_call.lock);
-        atomic_set(&smp_fn_call.finished, 0);
-        smp_fn_call.fn = func;
-        smp_fn_call.data = info;
-        for (i = 0; i < nr_cpus; i++)
-                if (i != smp_processor_id())
-                        plat_send_ipi(i, SMP_MSG_FUNCTION);
-        if (wait)
-                while (atomic_read(&smp_fn_call.finished) != (nr_cpus - 1));
-        spin_unlock(&smp_fn_call.lock);
+        for_each_cpu_mask(cpu, mask)
+                plat_send_ipi(cpu, SMP_MSG_FUNCTION);
+}
-        return 0;
+void arch_send_call_function_single_ipi(int cpu)
+{
+        plat_send_ipi(cpu, SMP_MSG_FUNCTION_SINGLE);
 }
 /* Not really SMP stuff ... */
@@ -229,7 +197,7 @@ static void flush_tlb_all_ipi(void *info)
 void flush_tlb_all(void)
 {
-        on_each_cpu(flush_tlb_all_ipi, 0, 1, 1);
+        on_each_cpu(flush_tlb_all_ipi, 0, 1);
 }
 static void flush_tlb_mm_ipi(void *mm)
@@ -255,7 +223,7 @@ void flush_tlb_mm(struct mm_struct *mm)
        preempt_disable();
        if ((atomic_read(&mm->mm_users) != 1) || (current->mm != mm)) {
-                smp_call_function(flush_tlb_mm_ipi, (void *)mm, 1, 1);
+                smp_call_function(flush_tlb_mm_ipi, (void *)mm, 1);
        } else {
                int i;
                for (i = 0; i < num_online_cpus(); i++)
@@ -292,7 +260,7 @@ void flush_tlb_range(struct vm_area_struct *vma,
                fd.vma = vma;
                fd.addr1 = start;
                fd.addr2 = end;
-                smp_call_function(flush_tlb_range_ipi, (void *)&fd, 1, 1);
+                smp_call_function(flush_tlb_range_ipi, (void *)&fd, 1);
        } else {
                int i;
                for (i = 0; i < num_online_cpus(); i++)
@@ -316,7 +284,7 @@ void flush_tlb_kernel_range(unsigned long start, unsigned long end)
        fd.addr1 = start;
        fd.addr2 = end;
-        on_each_cpu(flush_tlb_kernel_range_ipi, (void *)&fd, 1, 1);
+        on_each_cpu(flush_tlb_kernel_range_ipi, (void *)&fd, 1);
 }
 static void flush_tlb_page_ipi(void *info)
@@ -335,7 +303,7 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
                fd.vma = vma;
                fd.addr1 = page;
-                smp_call_function(flush_tlb_page_ipi, (void *)&fd, 1, 1);
+                smp_call_function(flush_tlb_page_ipi, (void *)&fd, 1);
        } else {
                int i;
                for (i = 0; i < num_online_cpus(); i++)
@@ -359,6 +327,6 @@ void flush_tlb_one(unsigned long asid, unsigned long vaddr)
        fd.addr1 = asid;
        fd.addr2 = vaddr;
-        smp_call_function(flush_tlb_one_ipi, (void *)&fd, 1, 1);
+        smp_call_function(flush_tlb_one_ipi, (void *)&fd, 1);
        local_flush_tlb_one(asid, vaddr);
 }
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index fa63c68a1819..c099d96f1239 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -807,7 +807,6 @@ extern unsigned long xcall_call_function;
 * smp_call_function(): Run a function on all other CPUs.
 * @func: The function to run. This must be fast and non-blocking.
 * @info: An arbitrary pointer to pass to the function.
- * @nonatomic: currently unused.
 * @wait: If true, wait (atomically) until function has completed on other CPUs.
 *
 * Returns 0 on success, else a negative status code. Does not return until
@@ -816,8 +815,8 @@ extern unsigned long xcall_call_function;
 * You must not call this function with disabled interrupts or from a
 * hardware interrupt handler or from a bottom half handler.
 */
-static int smp_call_function_mask(void (*func)(void *info), void *info,
+static int sparc64_smp_call_function_mask(void (*func)(void *info), void *info,
-                                  int nonatomic, int wait, cpumask_t mask)
+                                          int wait, cpumask_t mask)
 {
        struct call_data_struct data;
        int cpus;
@@ -852,11 +851,9 @@ out_unlock:
        return 0;
 }
-int smp_call_function(void (*func)(void *info), void *info,
+int smp_call_function(void (*func)(void *info), void *info, int wait)
-                      int nonatomic, int wait)
 {
-        return smp_call_function_mask(func, info, nonatomic, wait,
+        return sparc64_smp_call_function_mask(func, info, wait, cpu_online_map);
-                                      cpu_online_map);
 }
 void smp_call_function_client(int irq, struct pt_regs *regs)
@@ -893,7 +890,7 @@ static void tsb_sync(void *info)
 void smp_tsb_sync(struct mm_struct *mm)
 {
-        smp_call_function_mask(tsb_sync, mm, 0, 1, mm->cpu_vm_mask);
+        sparc64_smp_call_function_mask(tsb_sync, mm, 1, mm->cpu_vm_mask);
 }
 extern unsigned long xcall_flush_tlb_mm;
diff --git a/arch/sparc64/mm/hugetlbpage.c b/arch/sparc64/mm/hugetlbpage.c
index 6cfab2e4d340..ebefd2a14375 100644
--- a/arch/sparc64/mm/hugetlbpage.c
+++ b/arch/sparc64/mm/hugetlbpage.c
@@ -344,7 +344,7 @@ void hugetlb_prefault_arch_hook(struct mm_struct *mm)
                         * also executing in this address space.
                         */
                        mm->context.sparc64_ctx_val = ctx;
-                        on_each_cpu(context_reload, mm, 0, 0);
+                        on_each_cpu(context_reload, mm, 0);
                }
                spin_unlock(&ctx_alloc_lock);
        }
diff --git a/arch/um/kernel/smp.c b/arch/um/kernel/smp.c
index e1062ec36d40..be2d50c3aa95 100644
--- a/arch/um/kernel/smp.c
+++ b/arch/um/kernel/smp.c
@@ -214,8 +214,7 @@ void smp_call_function_slave(int cpu)
        atomic_inc(&scf_finished);
 }
-int smp_call_function(void (*_func)(void *info), void *_info, int nonatomic,
+int smp_call_function(void (*_func)(void *info), void *_info, int wait)
-                      int wait)
 {
        int cpus = num_online_cpus() - 1;
        int i;
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 2642b4bf41b9..96e0c2ebc388 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -170,6 +170,7 @@ config GENERIC_PENDING_IRQ
 config X86_SMP
        bool
        depends on SMP && ((X86_32 && !X86_VOYAGER) || X86_64)
+        select USE_GENERIC_SMP_HELPERS
        default y
 config X86_32_SMP
diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c
index 3e58b676d23b..a437d027f20b 100644
--- a/arch/x86/kernel/apic_32.c
+++ b/arch/x86/kernel/apic_32.c
@@ -1340,6 +1340,10 @@ void __init smp_intr_init(void)
        /* IPI for generic function call */
        alloc_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
+        /* IPI for single call function */
+        set_intr_gate(CALL_FUNCTION_SINGLE_VECTOR,
+                                call_function_single_interrupt);
 }
 #endif
diff --git a/arch/x86/kernel/cpu/mcheck/mce_64.c b/arch/x86/kernel/cpu/mcheck/mce_64.c
index 987410745182..c4a7ec31394c 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_64.c
@@ -364,7 +364,7 @@ static void mcheck_check_cpu(void *info)
 static void mcheck_timer(struct work_struct *work)
 {
-        on_each_cpu(mcheck_check_cpu, NULL, 1, 1);
+        on_each_cpu(mcheck_check_cpu, NULL, 1);
        /*
         * Alert userspace if needed.  If we logged an MCE, reduce the
@@ -621,7 +621,7 @@ static ssize_t mce_read(struct file *filp, char __user *ubuf, size_t usize,
         * Collect entries that were still getting written before the
         * synchronize.
         */
-        on_each_cpu(collect_tscs, cpu_tsc, 1, 1);
+        on_each_cpu(collect_tscs, cpu_tsc, 1);
        for (i = next; i < MCE_LOG_LEN; i++) {
                if (mcelog.entry[i].finished &&
                    mcelog.entry[i].tsc < cpu_tsc[mcelog.entry[i].cpu]) {
@@ -746,7 +746,7 @@ static void mce_restart(void)
        if (next_interval)
                cancel_delayed_work(&mcheck_work);
        /* Timer race is harmless here */
-        on_each_cpu(mce_init, NULL, 1, 1);
+        on_each_cpu(mce_init, NULL, 1);
        next_interval = check_interval * HZ;
        if (next_interval)
                schedule_delayed_work(&mcheck_work,
diff --git a/arch/x86/kernel/cpu/mcheck/non-fatal.c b/arch/x86/kernel/cpu/mcheck/non-fatal.c
index 00ccb6c14ec2..cc1fccdd31e0 100644
--- a/arch/x86/kernel/cpu/mcheck/non-fatal.c
+++ b/arch/x86/kernel/cpu/mcheck/non-fatal.c
@@ -59,7 +59,7 @@ static DECLARE_DELAYED_WORK(mce_work, mce_work_fn);
 static void mce_work_fn(struct work_struct *work)
 {
-        on_each_cpu(mce_checkregs, NULL, 1, 1);
+        on_each_cpu(mce_checkregs, NULL, 1);
        schedule_delayed_work(&mce_work, round_jiffies_relative(MCE_RATE));
 }
diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c
index 105afe12beb0..6f23969c8faf 100644
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -223,7 +223,7 @@ static void set_mtrr(unsigned int reg, unsigned long base,
        atomic_set(&data.gate,0);
        /*  Start the ball rolling on other CPUs  */
-        if (smp_call_function(ipi_handler, &data, 1, 0) != 0)
+        if (smp_call_function(ipi_handler, &data, 0) != 0)
                panic("mtrr: timed out waiting for other CPUs\n");
        local_irq_save(flags);
@@ -1682,7 +1682,7 @@ void mtrr_ap_init(void)
 */
 void mtrr_save_state(void)
 {
-        smp_call_function_single(0, mtrr_save_fixed_ranges, NULL, 1, 1);
+        smp_call_function_single(0, mtrr_save_fixed_ranges, NULL, 1);
 }
 static int __init mtrr_init_finialize(void)
diff --git a/arch/x86/kernel/cpu/perfctr-watchdog.c b/arch/x86/kernel/cpu/perfctr-watchdog.c
index 2e9bef6e3aa3..6d4bdc02388a 100644
--- a/arch/x86/kernel/cpu/perfctr-watchdog.c
+++ b/arch/x86/kernel/cpu/perfctr-watchdog.c
@@ -189,7 +189,7 @@ void disable_lapic_nmi_watchdog(void)
        if (atomic_read(&nmi_active) <= 0)
                return;
-        on_each_cpu(stop_apic_nmi_watchdog, NULL, 0, 1);
+        on_each_cpu(stop_apic_nmi_watchdog, NULL, 1);
        if (wd_ops)
                wd_ops->unreserve();
@@ -213,7 +213,7 @@ void enable_lapic_nmi_watchdog(void)
                return;
        }
-        on_each_cpu(setup_apic_nmi_watchdog, NULL, 0, 1);
+        on_each_cpu(setup_apic_nmi_watchdog, NULL, 1);
        touch_nmi_watchdog();
 }
diff --git a/arch/x86/kernel/cpuid.c b/arch/x86/kernel/cpuid.c
index 71f1c2654bec..2de5fa2bbf77 100644
--- a/arch/x86/kernel/cpuid.c
+++ b/arch/x86/kernel/cpuid.c
@@ -96,7 +96,7 @@ static ssize_t cpuid_read(struct file *file, char __user *buf,
        for (; count; count -= 16) {
                cmd.eax = pos;
                cmd.ecx = pos >> 32;
-                smp_call_function_single(cpu, cpuid_smp_cpuid, &cmd, 1, 1);
+                smp_call_function_single(cpu, cpuid_smp_cpuid, &cmd, 1);
                if (copy_to_user(tmp, &cmd, 16))
                        return -EFAULT;
                tmp += 16;
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index ba41bf42748d..ae63e584c340 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -816,6 +816,9 @@ END(invalidate_interrupt\num)
 ENTRY(call_function_interrupt)
        apicinterrupt CALL_FUNCTION_VECTOR,smp_call_function_interrupt
 END(call_function_interrupt)
+ENTRY(call_function_single_interrupt)
+        apicinterrupt CALL_FUNCTION_SINGLE_VECTOR,smp_call_function_single_interrupt
+END(call_function_single_interrupt)
 ENTRY(irq_move_cleanup_interrupt)
        apicinterrupt IRQ_MOVE_CLEANUP_VECTOR,smp_irq_move_cleanup_interrupt
 END(irq_move_cleanup_interrupt)
diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c
index 603261a5885c..558abf4c796a 100644
--- a/arch/x86/kernel/io_apic_32.c
+++ b/arch/x86/kernel/io_apic_32.c
@@ -1569,7 +1569,7 @@ void /*__init*/ print_local_APIC(void *dummy)
 void print_all_local_APICs(void)
 {
-        on_each_cpu(print_local_APIC, NULL, 1, 1);
+        on_each_cpu(print_local_APIC, NULL, 1);
 }
 void /*__init*/ print_PIC(void)
diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c
index b16ef029cf88..6510cde36b35 100644
--- a/arch/x86/kernel/io_apic_64.c
+++ b/arch/x86/kernel/io_apic_64.c
@@ -1160,7 +1160,7 @@ void __apicdebuginit print_local_APIC(void * dummy)
 void print_all_local_APICs (void)
 {
-        on_each_cpu(print_local_APIC, NULL, 1, 1);
+        on_each_cpu(print_local_APIC, NULL, 1);
 }
 void __apicdebuginit print_PIC(void)
diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index 31f49e8f46a7..0373e88de95a 100644
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -199,6 +199,10 @@ void __init native_init_IRQ(void)
        /* IPI for generic function call */
        alloc_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
+        /* IPI for generic single function call */
+        alloc_intr_gate(CALL_FUNCTION_SINGLE_VECTOR,
+                        call_function_single_interrupt);
        /* Low priority IPI to cleanup after moving an irq */
        set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
 #endif
diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 21f2bae98c15..a8449571858a 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -68,7 +68,7 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
                load_LDT(pc);
                mask = cpumask_of_cpu(smp_processor_id());
                if (!cpus_equal(current->mm->cpu_vm_mask, mask))
-                        smp_call_function(flush_ldt, current->mm, 1, 1);
+                        smp_call_function(flush_ldt, current->mm, 1);
                preempt_enable();
 #else
                load_LDT(pc);
diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c
index 716b89284be0..ec024b3baad0 100644
--- a/arch/x86/kernel/nmi.c
+++ b/arch/x86/kernel/nmi.c
@@ -130,7 +130,7 @@ int __init check_nmi_watchdog(void)
 #ifdef CONFIG_SMP
        if (nmi_watchdog == NMI_LOCAL_APIC)
-                smp_call_function(nmi_cpu_busy, (void *)&endflag, 0, 0);
+                smp_call_function(nmi_cpu_busy, (void *)&endflag, 0);
 #endif
        for_each_possible_cpu(cpu)
@@ -272,7 +272,7 @@ static void __acpi_nmi_enable(void *__unused)
 void acpi_nmi_enable(void)
 {
        if (atomic_read(&nmi_active) && nmi_watchdog == NMI_IO_APIC)
-                on_each_cpu(__acpi_nmi_enable, NULL, 0, 1);
+                on_each_cpu(__acpi_nmi_enable, NULL, 1);
 }
 static void __acpi_nmi_disable(void *__unused)
@@ -286,7 +286,7 @@ static void __acpi_nmi_disable(void *__unused)
 void acpi_nmi_disable(void)
 {
        if (atomic_read(&nmi_active) && nmi_watchdog == NMI_IO_APIC)
-                on_each_cpu(__acpi_nmi_disable, NULL, 0, 1);
+                on_each_cpu(__acpi_nmi_disable, NULL, 1);
 }
 void setup_apic_nmi_watchdog(void *unused)
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 4061d63aabe7..7dceea947232 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -132,7 +132,7 @@ void cpu_idle_wait(void)
 {
        smp_mb();
        /* kick all the CPUs so that they exit out of pm_idle */
-        smp_call_function(do_nothing, NULL, 0, 1);
+        smp_call_function(do_nothing, NULL, 1);
 }
 EXPORT_SYMBOL_GPL(cpu_idle_wait);
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index 0cb7aadc87cd..361b7a4c640c 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -121,132 +121,23 @@ static void native_smp_send_reschedule(int cpu)
        send_IPI_mask(cpumask_of_cpu(cpu), RESCHEDULE_VECTOR);
 }
-/*
+void native_send_call_func_single_ipi(int cpu)
- * Structure and data for smp_call_function(). This is designed to minimise
- * static memory requirements. It also looks cleaner.
- */
-static DEFINE_SPINLOCK(call_lock);
-struct call_data_struct {
-        void (*func) (void *info);
-        void *info;
-        atomic_t started;
-        atomic_t finished;
-        int wait;
-};
-void lock_ipi_call_lock(void)
 {
-        spin_lock_irq(&call_lock);
+        send_IPI_mask(cpumask_of_cpu(cpu), CALL_FUNCTION_SINGLE_VECTOR);
-}
-void unlock_ipi_call_lock(void)
-{
-        spin_unlock_irq(&call_lock);
-}
-static struct call_data_struct *call_data;
-static void __smp_call_function(void (*func) (void *info), void *info,
-                                int nonatomic, int wait)
-{
-        struct call_data_struct data;
-        int cpus = num_online_cpus() - 1;
-        if (!cpus)
-                return;
-        data.func = func;
-        data.info = info;
-        atomic_set(&data.started, 0);
-        data.wait = wait;
-        if (wait)
-                atomic_set(&data.finished, 0);
-        call_data = &data;
-        mb();
-        /* Send a message to all other CPUs and wait for them to respond */
-        send_IPI_allbutself(CALL_FUNCTION_VECTOR);
-        /* Wait for response */
-        while (atomic_read(&data.started) != cpus)
-                cpu_relax();
-        if (wait)
-                while (atomic_read(&data.finished) != cpus)
-                        cpu_relax();
 }
+void native_send_call_func_ipi(cpumask_t mask)
-/**
- * smp_call_function_mask(): Run a function on a set of other CPUs.
- * @mask: The set of cpus to run on.  Must not include the current cpu.
- * @func: The function to run. This must be fast and non-blocking.
- * @info: An arbitrary pointer to pass to the function.
- * @wait: If true, wait (atomically) until function has completed on other CPUs.
- *
-  * Returns 0 on success, else a negative status code.
- *
- * If @wait is true, then returns once @func has returned; otherwise
- * it returns just before the target cpu calls @func.
- *
- * You must not call this function with disabled interrupts or from a
- * hardware interrupt handler or from a bottom half handler.
- */
-static int
-native_smp_call_function_mask(cpumask_t mask,
-                              void (*func)(void *), void *info,
-                              int wait)
 {
-        struct call_data_struct data;
        cpumask_t allbutself;
-        int cpus;
-        /* Can deadlock when called with interrupts disabled */
-        WARN_ON(irqs_disabled());
-        /* Holding any lock stops cpus from going down. */
-        spin_lock(&call_lock);
        allbutself = cpu_online_map;
        cpu_clear(smp_processor_id(), allbutself);
-        cpus_and(mask, mask, allbutself);
-        cpus = cpus_weight(mask);
-        if (!cpus) {
-                spin_unlock(&call_lock);
-                return 0;
-        }
-        data.func = func;
-        data.info = info;
-        atomic_set(&data.started, 0);
-        data.wait = wait;
-        if (wait)
-                atomic_set(&data.finished, 0);
-        call_data = &data;
-        wmb();
-        /* Send a message to other CPUs */
        if (cpus_equal(mask, allbutself) &&
            cpus_equal(cpu_online_map, cpu_callout_map))
                send_IPI_allbutself(CALL_FUNCTION_VECTOR);
        else
                send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
-        /* Wait for response */
-        while (atomic_read(&data.started) != cpus)
-                cpu_relax();
-        if (wait)
-                while (atomic_read(&data.finished) != cpus)
-                        cpu_relax();
-        spin_unlock(&call_lock);
-        return 0;
 }
 static void stop_this_cpu(void *dummy)
@@ -268,18 +159,13 @@ static void stop_this_cpu(void *dummy)
 static void native_smp_send_stop(void)
 {
-        int nolock;
        unsigned long flags;
        if (reboot_force)
                return;
-        /* Don't deadlock on the call lock in panic */
+        smp_call_function(stop_this_cpu, NULL, 0);
-        nolock = !spin_trylock(&call_lock);
        local_irq_save(flags);
-        __smp_call_function(stop_this_cpu, NULL, 0, 0);
-        if (!nolock)
-                spin_unlock(&call_lock);
        disable_local_APIC();
        local_irq_restore(flags);
 }
@@ -301,33 +187,28 @@ void smp_reschedule_interrupt(struct pt_regs *regs)
 void smp_call_function_interrupt(struct pt_regs *regs)
 {
-        void (*func) (void *info) = call_data->func;
-        void *info = call_data->info;
-        int wait = call_data->wait;
        ack_APIC_irq();
-        /*
-         * Notify initiating CPU that I've grabbed the data and am
-         * about to execute the function
-         */
-        mb();
-        atomic_inc(&call_data->started);
-        /*
-         * At this point the info structure may be out of scope unless wait==1
-         */
        irq_enter();
-        (*func)(info);
+        generic_smp_call_function_interrupt();
 #ifdef CONFIG_X86_32
        __get_cpu_var(irq_stat).irq_call_count++;
 #else
        add_pda(irq_call_count, 1);
 #endif
        irq_exit();
+}
-        if (wait) {
+void smp_call_function_single_interrupt(struct pt_regs *regs)
-                mb();
+{
-                atomic_inc(&call_data->finished);
+        ack_APIC_irq();
-        }
+        irq_enter();
+        generic_smp_call_function_single_interrupt();
+#ifdef CONFIG_X86_32
+        __get_cpu_var(irq_stat).irq_call_count++;
+#else
+        add_pda(irq_call_count, 1);
+#endif
+        irq_exit();
 }
 struct smp_ops smp_ops = {
@@ -338,7 +219,8 @@ struct smp_ops smp_ops = {
        .smp_send_stop = native_smp_send_stop,
        .smp_send_reschedule = native_smp_send_reschedule,
-        .smp_call_function_mask = native_smp_call_function_mask,
+        .send_call_func_ipi = native_send_call_func_ipi,
+        .send_call_func_single_ipi = native_send_call_func_single_ipi,
 };
 EXPORT_SYMBOL_GPL(smp_ops);
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index f35c2d8016ac..687376ab07e8 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -327,12 +327,12 @@ static void __cpuinit start_secondary(void *unused)
         * lock helps us to not include this cpu in a currently in progress
         * smp_call_function().
         */
-        lock_ipi_call_lock();
+        ipi_call_lock_irq();
 #ifdef CONFIG_X86_IO_APIC
        setup_vector_irq(smp_processor_id());
 #endif
        cpu_set(smp_processor_id(), cpu_online_map);
-        unlock_ipi_call_lock();
+        ipi_call_unlock_irq();
        per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
        setup_secondary_clock();
diff --git a/arch/x86/kernel/smpcommon.c b/arch/x86/kernel/smpcommon.c
index 3449064d141a..99941b37eca0 100644
--- a/arch/x86/kernel/smpcommon.c
+++ b/arch/x86/kernel/smpcommon.c
@@ -25,59 +25,3 @@ __cpuinit void init_gdt(int cpu)
        per_cpu(cpu_number, cpu) = cpu;
 }
 #endif
-/**
- * smp_call_function(): Run a function on all other CPUs.
- * @func: The function to run. This must be fast and non-blocking.
- * @info: An arbitrary pointer to pass to the function.
- * @nonatomic: Unused.
- * @wait: If true, wait (atomically) until function has completed on other CPUs.
- *
- * Returns 0 on success, else a negative status code.
- *
- * If @wait is true, then returns once @func has returned; otherwise
- * it returns just before the target cpu calls @func.
- *
- * You must not call this function with disabled interrupts or from a
- * hardware interrupt handler or from a bottom half handler.
- */
-int smp_call_function(void (*func) (void *info), void *info, int nonatomic,
-                      int wait)
-{
-        return smp_call_function_mask(cpu_online_map, func, info, wait);
-}
-EXPORT_SYMBOL(smp_call_function);
-/**
- * smp_call_function_single - Run a function on a specific CPU
- * @cpu: The target CPU.  Cannot be the calling CPU.
- * @func: The function to run. This must be fast and non-blocking.
- * @info: An arbitrary pointer to pass to the function.
- * @nonatomic: Unused.
- * @wait: If true, wait until function has completed on other CPUs.
- *
- * Returns 0 on success, else a negative status code.
- *
- * If @wait is true, then returns once @func has returned; otherwise
- * it returns just before the target cpu calls @func.
- */
-int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
-                             int nonatomic, int wait)
-{
-        /* prevent preemption and reschedule on another processor */
-        int ret;
-        int me = get_cpu();
-        if (cpu == me) {
-                local_irq_disable();
-                func(info);
-                local_irq_enable();
-                put_cpu();
-                return 0;
-        }
-        ret = smp_call_function_mask(cpumask_of_cpu(cpu), func, info, wait);
-        put_cpu();
-        return ret;
-}
-EXPORT_SYMBOL(smp_call_function_single);
diff --git a/arch/x86/kernel/tlb_32.c b/arch/x86/kernel/tlb_32.c
index 9bb2363851af..fec1ecedc9b7 100644
--- a/arch/x86/kernel/tlb_32.c
+++ b/arch/x86/kernel/tlb_32.c
@@ -238,6 +238,6 @@ static void do_flush_tlb_all(void *info)
 void flush_tlb_all(void)
 {
-        on_each_cpu(do_flush_tlb_all, NULL, 1, 1);
+        on_each_cpu(do_flush_tlb_all, NULL, 1);
 }
diff --git a/arch/x86/kernel/tlb_64.c b/arch/x86/kernel/tlb_64.c
index 5039d0f097a2..dcbf7a1159ea 100644
--- a/arch/x86/kernel/tlb_64.c
+++ b/arch/x86/kernel/tlb_64.c
@@ -275,5 +275,5 @@ static void do_flush_tlb_all(void *info)
 void flush_tlb_all(void)
 {
-        on_each_cpu(do_flush_tlb_all, NULL, 1, 1);
+        on_each_cpu(do_flush_tlb_all, NULL, 1);
 }
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index e50740d32314..0b8b6690a86d 100644
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -279,7 +279,7 @@ cpu_vsyscall_notifier(struct notifier_block *n, unsigned long action, void *arg)
 {
        long cpu = (long)arg;
        if (action == CPU_ONLINE || action == CPU_ONLINE_FROZEN)
-                smp_call_function_single(cpu, cpu_vsyscall_init, NULL, 0, 1);
+                smp_call_function_single(cpu, cpu_vsyscall_init, NULL, 1);
        return NOTIFY_DONE;
 }
@@ -302,7 +302,7 @@ static int __init vsyscall_init(void)
 #ifdef CONFIG_SYSCTL
        register_sysctl_table(kernel_root_table2);
 #endif
-        on_each_cpu(cpu_vsyscall_init, NULL, 0, 1);
+        on_each_cpu(cpu_vsyscall_init, NULL, 1);
        hotcpu_notifier(cpu_vsyscall_notifier, 0);
        return 0;
 }
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 540e95179074..10ce6ee4c491 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -335,7 +335,7 @@ static void vcpu_clear(struct vcpu_vmx *vmx)
 {
        if (vmx->vcpu.cpu == -1)
                return;
-        smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 0, 1);
+        smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1);
        vmx->launched = 0;
 }
@@ -2968,7 +2968,7 @@ static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
        struct vcpu_vmx *vmx = to_vmx(vcpu);
        if (vmx->vmcs) {
-                on_each_cpu(__vcpu_clear, vmx, 0, 1);
+                on_each_cpu(__vcpu_clear, vmx, 1);
                free_vmcs(vmx->vmcs);
                vmx->vmcs = NULL;
        }
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 63a77caa59f1..0faa2546b1cd 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4044,6 +4044,6 @@ void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
         * So need not to call smp_call_function_single() in that case.
         */
        if (vcpu->guest_mode && vcpu->cpu != cpu)
-                smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0);
+                smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0);
        put_cpu();
 }
diff --git a/arch/x86/lib/msr-on-cpu.c b/arch/x86/lib/msr-on-cpu.c
index 57d043fa893e..d5a2b39f882b 100644
--- a/arch/x86/lib/msr-on-cpu.c
+++ b/arch/x86/lib/msr-on-cpu.c
@@ -30,10 +30,10 @@ static int _rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h, int safe)
        rv.msr_no = msr_no;
        if (safe) {
-                smp_call_function_single(cpu, __rdmsr_safe_on_cpu, &rv, 0, 1);
+                smp_call_function_single(cpu, __rdmsr_safe_on_cpu, &rv, 1);
                err = rv.err;
        } else {
-                smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 0, 1);
+                smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 1);
        }
        *l = rv.l;
        *h = rv.h;
@@ -64,10 +64,10 @@ static int _wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h, int safe)
        rv.l = l;
        rv.h = h;
        if (safe) {
-                smp_call_function_single(cpu, __wrmsr_safe_on_cpu, &rv, 0, 1);
+                smp_call_function_single(cpu, __wrmsr_safe_on_cpu, &rv, 1);
                err = rv.err;
        } else {
-                smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 0, 1);
+                smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 1);
        }
        return err;
diff --git a/arch/x86/mach-voyager/voyager_smp.c b/arch/x86/mach-voyager/voyager_smp.c
index 8dedd01e909f..ee0fba092157 100644
--- a/arch/x86/mach-voyager/voyager_smp.c
+++ b/arch/x86/mach-voyager/voyager_smp.c
@@ -950,94 +950,24 @@ static void smp_stop_cpu_function(void *dummy)
                halt();
 }
-static DEFINE_SPINLOCK(call_lock);
-struct call_data_struct {
-        void (*func) (void *info);
-        void *info;
-        volatile unsigned long started;
-        volatile unsigned long finished;
-        int wait;
-};
-static struct call_data_struct *call_data;
 /* execute a thread on a new CPU.  The function to be called must be
 * previously set up.  This is used to schedule a function for
 * execution on all CPUs - set up the function then broadcast a
 * function_interrupt CPI to come here on each CPU */
 static void smp_call_function_interrupt(void)
 {
-        void (*func) (void *info) = call_data->func;
-        void *info = call_data->info;
-        /* must take copy of wait because call_data may be replaced
-         * unless the function is waiting for us to finish */
-        int wait = call_data->wait;
-        __u8 cpu = smp_processor_id();
-        /*
-         * Notify initiating CPU that I've grabbed the data and am
-         * about to execute the function
-         */
-        mb();
-        if (!test_and_clear_bit(cpu, &call_data->started)) {
-                /* If the bit wasn't set, this could be a replay */
-                printk(KERN_WARNING "VOYAGER SMP: CPU %d received call funtion"
-                       " with no call pending\n", cpu);
-                return;
-        }
-        /*
-         * At this point the info structure may be out of scope unless wait==1
-         */
        irq_enter();
-        (*func) (info);
+        generic_smp_call_function_interrupt();
        __get_cpu_var(irq_stat).irq_call_count++;
        irq_exit();
-        if (wait) {
-                mb();
-                clear_bit(cpu, &call_data->finished);
-        }
 }
-static int
+static void smp_call_function_single_interrupt(void)
-voyager_smp_call_function_mask(cpumask_t cpumask,
-                               void (*func) (void *info), void *info, int wait)
 {
-        struct call_data_struct data;
+        irq_enter();
-        u32 mask = cpus_addr(cpumask)[0];
+        generic_smp_call_function_single_interrupt();
+        __get_cpu_var(irq_stat).irq_call_count++;
-        mask &= ~(1 << smp_processor_id());
+        irq_exit();
-        if (!mask)
-                return 0;
-        /* Can deadlock when called with interrupts disabled */
-        WARN_ON(irqs_disabled());
-        data.func = func;
-        data.info = info;
-        data.started = mask;
-        data.wait = wait;
-        if (wait)
-                data.finished = mask;
-        spin_lock(&call_lock);
-        call_data = &data;
-        wmb();
-        /* Send a message to all other CPUs and wait for them to respond */
-        send_CPI(mask, VIC_CALL_FUNCTION_CPI);
-        /* Wait for response */
-        while (data.started)
-                barrier();
-        if (wait)
-                while (data.finished)
-                        barrier();
-        spin_unlock(&call_lock);
-        return 0;
 }
 /* Sorry about the name.  In an APIC based system, the APICs
@@ -1094,6 +1024,12 @@ void smp_qic_call_function_interrupt(struct pt_regs *regs)
        smp_call_function_interrupt();
 }
+void smp_qic_call_function_single_interrupt(struct pt_regs *regs)
+{
+        ack_QIC_CPI(QIC_CALL_FUNCTION_SINGLE_CPI);
+        smp_call_function_single_interrupt();
+}
 void smp_vic_cpi_interrupt(struct pt_regs *regs)
 {
        struct pt_regs *old_regs = set_irq_regs(regs);
@@ -1114,6 +1050,8 @@ void smp_vic_cpi_interrupt(struct pt_regs *regs)
                smp_enable_irq_interrupt();
        if (test_and_clear_bit(VIC_CALL_FUNCTION_CPI, &vic_cpi_mailbox[cpu]))
                smp_call_function_interrupt();
+        if (test_and_clear_bit(VIC_CALL_FUNCTION_SINGLE_CPI, &vic_cpi_mailbox[cpu]))
+                smp_call_function_single_interrupt();
        set_irq_regs(old_regs);
 }
@@ -1129,7 +1067,7 @@ static void do_flush_tlb_all(void *info)
 /* flush the TLB of every active CPU in the system */
 void flush_tlb_all(void)
 {
-        on_each_cpu(do_flush_tlb_all, 0, 1, 1);
+        on_each_cpu(do_flush_tlb_all, 0, 1);
 }
 /* send a reschedule CPI to one CPU by physical CPU number*/
@@ -1161,7 +1099,7 @@ int safe_smp_processor_id(void)
 /* broadcast a halt to all other CPUs */
 static void voyager_smp_send_stop(void)
 {
-        smp_call_function(smp_stop_cpu_function, NULL, 1, 1);
+        smp_call_function(smp_stop_cpu_function, NULL, 1);
 }
 /* this function is triggered in time.c when a clock tick fires
@@ -1848,5 +1786,7 @@ struct smp_ops smp_ops = {
        .smp_send_stop = voyager_smp_send_stop,
        .smp_send_reschedule = voyager_smp_send_reschedule,
-        .smp_call_function_mask = voyager_smp_call_function_mask,
+        .send_call_func_ipi = native_send_call_func_ipi,
+        .send_call_func_single_ipi = native_send_call_func_single_ipi,
 };
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 47f4e2e4a096..65c6e46bf059 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -141,7 +141,7 @@ static void cpa_flush_all(unsigned long cache)
 {
        BUG_ON(irqs_disabled());
-        on_each_cpu(__cpa_flush_all, (void *) cache, 1, 1);
+        on_each_cpu(__cpa_flush_all, (void *) cache, 1);
 }
 static void __cpa_flush_range(void *arg)
@@ -162,7 +162,7 @@ static void cpa_flush_range(unsigned long start, int numpages, int cache)
        BUG_ON(irqs_disabled());
        WARN_ON(PAGE_ALIGN(start) != start);
-        on_each_cpu(__cpa_flush_range, NULL, 1, 1);
+        on_each_cpu(__cpa_flush_range, NULL, 1);
        if (!cache)
                return;
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index 2b6ad5b9f9d5..7f3329b55d2e 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -218,8 +218,8 @@ static int nmi_setup(void)
                }
        }
-        on_each_cpu(nmi_save_registers, NULL, 0, 1);
+        on_each_cpu(nmi_save_registers, NULL, 1);
-        on_each_cpu(nmi_cpu_setup, NULL, 0, 1);
+        on_each_cpu(nmi_cpu_setup, NULL, 1);
        nmi_enabled = 1;
        return 0;
 }
@@ -271,7 +271,7 @@ static void nmi_shutdown(void)
 {
        struct op_msrs *msrs = &get_cpu_var(cpu_msrs);
        nmi_enabled = 0;
-        on_each_cpu(nmi_cpu_shutdown, NULL, 0, 1);
+        on_each_cpu(nmi_cpu_shutdown, NULL, 1);
        unregister_die_notifier(&profile_exceptions_nb);
        model->shutdown(msrs);
        free_msrs();
@@ -286,7 +286,7 @@ static void nmi_cpu_start(void *dummy)
 static int nmi_start(void)
 {
-        on_each_cpu(nmi_cpu_start, NULL, 0, 1);
+        on_each_cpu(nmi_cpu_start, NULL, 1);
        return 0;
 }
@@ -298,7 +298,7 @@ static void nmi_cpu_stop(void *dummy)
 static void nmi_stop(void)
 {
-        on_each_cpu(nmi_cpu_stop, NULL, 0, 1);
+        on_each_cpu(nmi_cpu_stop, NULL, 1);
 }
 struct op_counter_config counter_config[OP_MAX_COUNTER];
diff --git a/arch/x86/pci/amd_bus.c b/arch/x86/pci/amd_bus.c
index a18141ae3f02..dbf532369711 100644
--- a/arch/x86/pci/amd_bus.c
+++ b/arch/x86/pci/amd_bus.c
@@ -578,7 +578,7 @@ static int __init enable_pci_io_ecs(void)
        /* assume all cpus from fam10h have IO ECS */
        if (boot_cpu_data.x86 < 0x10)
                return 0;
-        on_each_cpu(enable_pci_io_ecs_per_cpu, NULL, 1, 1);
+        on_each_cpu(enable_pci_io_ecs_per_cpu, NULL, 1);
        pci_probe |= PCI_HAS_IO_ECS;
        return 0;
 }
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index dcd4e51f2f16..bb508456ef52 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1214,7 +1214,9 @@ static const struct smp_ops xen_smp_ops __initdata = {
        .smp_send_stop = xen_smp_send_stop,
        .smp_send_reschedule = xen_smp_send_reschedule,
-        .smp_call_function_mask = xen_smp_call_function_mask,
+        .send_call_func_ipi = xen_smp_send_call_function_ipi,
+        .send_call_func_single_ipi = xen_smp_send_call_function_single_ipi,
 };
 #endif  /* CONFIG_SMP */
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 42b3b9ed641d..ff0aa74afaa1 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -796,7 +796,7 @@ static void drop_mm_ref(struct mm_struct *mm)
        }
        if (!cpus_empty(mask))
-                xen_smp_call_function_mask(mask, drop_other_mm_ref, mm, 1);
+                smp_call_function_mask(mask, drop_other_mm_ref, mm, 1);
 }
 #else
 static void drop_mm_ref(struct mm_struct *mm)
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index d2e3c20127d7..233156f39b7f 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -36,27 +36,14 @@
 #include "mmu.h"
 cpumask_t xen_cpu_initialized_map;
-static DEFINE_PER_CPU(int, resched_irq) = -1;
-static DEFINE_PER_CPU(int, callfunc_irq) = -1;
-static DEFINE_PER_CPU(int, debug_irq) = -1;
-/*
- * Structure and data for smp_call_function(). This is designed to minimise
- * static memory requirements. It also looks cleaner.
- */
-static DEFINE_SPINLOCK(call_lock);
-struct call_data_struct {
+static DEFINE_PER_CPU(int, resched_irq);
-        void (*func) (void *info);
+static DEFINE_PER_CPU(int, callfunc_irq);
-        void *info;
+static DEFINE_PER_CPU(int, callfuncsingle_irq);
-        atomic_t started;
+static DEFINE_PER_CPU(int, debug_irq) = -1;
-        atomic_t finished;
-        int wait;
-};
 static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id);
+static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id);
-static struct call_data_struct *call_data;
 /*
 * Reschedule call back. Nothing to do,
@@ -128,6 +115,17 @@ static int xen_smp_intr_init(unsigned int cpu)
                goto fail;
        per_cpu(debug_irq, cpu) = rc;
+        callfunc_name = kasprintf(GFP_KERNEL, "callfuncsingle%d", cpu);
+        rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_SINGLE_VECTOR,
+                                    cpu,
+                                    xen_call_function_single_interrupt,
+                                    IRQF_DISABLED|IRQF_PERCPU|IRQF_NOBALANCING,
+                                    callfunc_name,
+                                    NULL);
+        if (rc < 0)
+                goto fail;
+        per_cpu(callfuncsingle_irq, cpu) = rc;
        return 0;
 fail:
@@ -137,6 +135,9 @@ static int xen_smp_intr_init(unsigned int cpu)
                unbind_from_irqhandler(per_cpu(callfunc_irq, cpu), NULL);
        if (per_cpu(debug_irq, cpu) >= 0)
                unbind_from_irqhandler(per_cpu(debug_irq, cpu), NULL);
+        if (per_cpu(callfuncsingle_irq, cpu) >= 0)
+                unbind_from_irqhandler(per_cpu(callfuncsingle_irq, cpu), NULL);
        return rc;
 }
@@ -336,7 +337,7 @@ static void stop_self(void *v)
 void xen_smp_send_stop(void)
 {
-        smp_call_function(stop_self, NULL, 0, 0);
+        smp_call_function(stop_self, NULL, 0);
 }
 void xen_smp_send_reschedule(int cpu)
@@ -344,7 +345,6 @@ void xen_smp_send_reschedule(int cpu)
        xen_send_IPI_one(cpu, XEN_RESCHEDULE_VECTOR);
 }
 static void xen_send_IPI_mask(cpumask_t mask, enum ipi_vector vector)
 {
        unsigned cpu;
@@ -355,83 +355,42 @@ static void xen_send_IPI_mask(cpumask_t mask, enum ipi_vector vector)
                xen_send_IPI_one(cpu, vector);
 }
+void xen_smp_send_call_function_ipi(cpumask_t mask)
+{
+        int cpu;
+        xen_send_IPI_mask(mask, XEN_CALL_FUNCTION_VECTOR);
+        /* Make sure other vcpus get a chance to run if they need to. */
+        for_each_cpu_mask(cpu, mask) {
+                if (xen_vcpu_stolen(cpu)) {
+                        HYPERVISOR_sched_op(SCHEDOP_yield, 0);
+                        break;
+                }
+        }
+}
+void xen_smp_send_call_function_single_ipi(int cpu)
+{
+        xen_send_IPI_mask(cpumask_of_cpu(cpu), XEN_CALL_FUNCTION_SINGLE_VECTOR);
+}
 static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id)
 {
-        void (*func) (void *info) = call_data->func;
-        void *info = call_data->info;
-        int wait = call_data->wait;
-        /*
-         * Notify initiating CPU that I've grabbed the data and am
-         * about to execute the function
-         */
-        mb();
-        atomic_inc(&call_data->started);
-        /*
-         * At this point the info structure may be out of scope unless wait==1
-         */
        irq_enter();
-        (*func)(info);
+        generic_smp_call_function_interrupt();
        __get_cpu_var(irq_stat).irq_call_count++;
        irq_exit();
-        if (wait) {
-                mb();           /* commit everything before setting finished */
-                atomic_inc(&call_data->finished);
-        }
        return IRQ_HANDLED;
 }
-int xen_smp_call_function_mask(cpumask_t mask, void (*func)(void *),
+static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id)
-                               void *info, int wait)
 {
-        struct call_data_struct data;
+        irq_enter();
-        int cpus, cpu;
+        generic_smp_call_function_single_interrupt();
-        bool yield;
+        __get_cpu_var(irq_stat).irq_call_count++;
+        irq_exit();
-        /* Holding any lock stops cpus from going down. */
-        spin_lock(&call_lock);
-        cpu_clear(smp_processor_id(), mask);
-        cpus = cpus_weight(mask);
-        if (!cpus) {
-                spin_unlock(&call_lock);
-                return 0;
-        }
-        /* Can deadlock when called with interrupts disabled */
-        WARN_ON(irqs_disabled());
-        data.func = func;
-        data.info = info;
-        atomic_set(&data.started, 0);
-        data.wait = wait;
-        if (wait)
-                atomic_set(&data.finished, 0);
-        call_data = &data;
-        mb();                   /* write everything before IPI */
-        /* Send a message to other CPUs and wait for them to respond */
-        xen_send_IPI_mask(mask, XEN_CALL_FUNCTION_VECTOR);
-        /* Make sure other vcpus get a chance to run if they need to. */
-        yield = false;
-        for_each_cpu_mask(cpu, mask)
-                if (xen_vcpu_stolen(cpu))
-                        yield = true;
-        if (yield)
-                HYPERVISOR_sched_op(SCHEDOP_yield, 0);
-        /* Wait for response */
-        while (atomic_read(&data.started) != cpus ||
-               (wait && atomic_read(&data.finished) != cpus))
-                cpu_relax();
-        spin_unlock(&call_lock);
-        return 0;
+        return IRQ_HANDLED;
 }
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index d852ddbb3448..6f4b1045c1c2 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -55,13 +55,8 @@ void xen_smp_cpus_done(unsigned int max_cpus);
 void xen_smp_send_stop(void);
 void xen_smp_send_reschedule(int cpu);
-int xen_smp_call_function (void (*func) (void *info), void *info, int nonatomic,
+void xen_smp_send_call_function_ipi(cpumask_t mask);
-                           int wait);
+void xen_smp_send_call_function_single_ipi(int cpu);
-int xen_smp_call_function_single(int cpu, void (*func) (void *info), void *info,
-                                 int nonatomic, int wait);
-int xen_smp_call_function_mask(cpumask_t mask, void (*func)(void *),
-                               void *info, int wait);
 extern cpumask_t xen_cpu_initialized_map;
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 556ee1585192..4976e5db2b3f 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1339,7 +1339,7 @@ static void smp_callback(void *v)
 static int acpi_processor_latency_notify(struct notifier_block *b,
                unsigned long l, void *v)
 {
-        smp_call_function(smp_callback, NULL, 0, 1);
+        smp_call_function(smp_callback, NULL, 1);
        return NOTIFY_OK;
 }
diff --git a/drivers/char/agp/generic.c b/drivers/char/agp/generic.c
index 564daaa6c7d0..eaa1a355bb32 100644
--- a/drivers/char/agp/generic.c
+++ b/drivers/char/agp/generic.c
@@ -1249,7 +1249,7 @@ static void ipi_handler(void *null)
 void global_cache_flush(void)
 {
-        if (on_each_cpu(ipi_handler, NULL, 1, 1) != 0)
+        if (on_each_cpu(ipi_handler, NULL, 1) != 0)
                panic(PFX "timed out waiting for the other CPUs!\n");
 }
 EXPORT_SYMBOL(global_cache_flush);
diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index dbce1263bdff..8fdfe9c871e3 100644
--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@@ -215,7 +215,7 @@ static void showacpu(void *dummy)
 static void sysrq_showregs_othercpus(struct work_struct *dummy)
 {
-        smp_call_function(showacpu, NULL, 0, 0);
+        smp_call_function(showacpu, NULL, 0);
 }
 static DECLARE_WORK(sysrq_showallcpus, sysrq_showregs_othercpus);
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 23554b676d6e..5405769020a1 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -340,7 +340,7 @@ static void smp_callback(void *v)
 static int cpuidle_latency_notify(struct notifier_block *b,
                unsigned long l, void *v)
 {
-        smp_call_function(smp_callback, NULL, 0, 1);
+        smp_call_function(smp_callback, NULL, 1);
        return NOTIFY_OK;
 }
diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
index 2e554a4ab337..95dfda52b4f9 100644
--- a/drivers/lguest/x86/core.c
+++ b/drivers/lguest/x86/core.c
@@ -478,7 +478,7 @@ void __init lguest_arch_host_init(void)
                cpu_had_pge = 1;
                /* adjust_pge is a helper function which sets or unsets the PGE
                 * bit on its CPU, depending on the argument (0 == unset). */
-                on_each_cpu(adjust_pge, (void *)0, 0, 1);
+                on_each_cpu(adjust_pge, (void *)0, 1);
                /* Turn off the feature in the global feature set. */
                clear_bit(X86_FEATURE_PGE, boot_cpu_data.x86_capability);
        }
@@ -493,7 +493,7 @@ void __exit lguest_arch_host_fini(void)
        if (cpu_had_pge) {
                set_bit(X86_FEATURE_PGE, boot_cpu_data.x86_capability);
                /* adjust_pge's argument "1" means set PGE. */
-                on_each_cpu(adjust_pge, (void *)1, 0, 1);
+                on_each_cpu(adjust_pge, (void *)1, 1);
        }
        put_online_cpus();
 }
diff --git a/drivers/watchdog/booke_wdt.c b/drivers/watchdog/booke_wdt.c
index c1ba0db48501..770824458d45 100644
--- a/drivers/watchdog/booke_wdt.c
+++ b/drivers/watchdog/booke_wdt.c
@@ -55,7 +55,7 @@ static void __booke_wdt_ping(void *data)
 static void booke_wdt_ping(void)
 {
-        on_each_cpu(__booke_wdt_ping, NULL, 0, 0);
+        on_each_cpu(__booke_wdt_ping, NULL, 0);
 }
 static void __booke_wdt_enable(void *data)
@@ -131,7 +131,7 @@ static int booke_wdt_open(struct inode *inode, struct file *file)
        spin_lock(&booke_wdt_lock);
        if (booke_wdt_enabled == 0) {
                booke_wdt_enabled = 1;
-                on_each_cpu(__booke_wdt_enable, NULL, 0, 0);
+                on_each_cpu(__booke_wdt_enable, NULL, 0);
                printk(KERN_INFO "PowerPC Book-E Watchdog Timer Enabled "
                                "(wdt_period=%d)\n", booke_wdt_period);
        }
@@ -177,7 +177,7 @@ static int __init booke_wdt_init(void)
        if (booke_wdt_enabled == 1) {
                printk(KERN_INFO "PowerPC Book-E Watchdog Timer Enabled "
                                "(wdt_period=%d)\n", booke_wdt_period);
-                on_each_cpu(__booke_wdt_enable, NULL, 0, 0);
+                on_each_cpu(__booke_wdt_enable, NULL, 0);
        }
        spin_unlock(&booke_wdt_lock);
diff --git a/fs/buffer.c b/fs/buffer.c
index 5fa1512cd9a2..d48caee12e2a 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1464,7 +1464,7 @@ static void invalidate_bh_lru(void *arg)
        
 void invalidate_bh_lrus(void)
 {
-        on_each_cpu(invalidate_bh_lru, NULL, 1, 1);
+        on_each_cpu(invalidate_bh_lru, NULL, 1);
 }
 EXPORT_SYMBOL_GPL(invalidate_bh_lrus);
diff --git a/include/asm-alpha/smp.h b/include/asm-alpha/smp.h
index 286e1d844f63..544c69af8168 100644
--- a/include/asm-alpha/smp.h
+++ b/include/asm-alpha/smp.h
@@ -47,12 +47,13 @@ extern struct cpuinfo_alpha cpu_data[NR_CPUS];
 extern int smp_num_cpus;
 #define cpu_possible_map        cpu_present_map
-int smp_call_function_on_cpu(void (*func) (void *info), void *info,int retry, int wait, cpumask_t cpu);
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi(cpumask_t mask);
 #else /* CONFIG_SMP */
 #define hard_smp_processor_id()         0
-#define smp_call_function_on_cpu(func,info,retry,wait,cpu)    ({ 0; })
+#define smp_call_function_on_cpu(func,info,wait,cpu)    ({ 0; })
 #endif /* CONFIG_SMP */
diff --git a/include/asm-arm/smp.h b/include/asm-arm/smp.h
index af99636db400..7fffa2404b8e 100644
--- a/include/asm-arm/smp.h
+++ b/include/asm-arm/smp.h
@@ -101,6 +101,9 @@ extern void platform_cpu_die(unsigned int cpu);
 extern int platform_cpu_kill(unsigned int cpu);
 extern void platform_cpu_enable(unsigned int cpu);
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi(cpumask_t mask);
 /*
 * Local timer interrupt handling function (can be IPI'ed).
 */
diff --git a/include/asm-ia64/smp.h b/include/asm-ia64/smp.h
index ec5f355fb7e3..27731e032ee9 100644
--- a/include/asm-ia64/smp.h
+++ b/include/asm-ia64/smp.h
@@ -38,9 +38,6 @@ ia64_get_lid (void)
        return lid.f.id << 8 | lid.f.eid;
 }
-extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
-                                  void *info, int wait);
 #define hard_smp_processor_id()         ia64_get_lid()
 #ifdef CONFIG_SMP
@@ -124,11 +121,12 @@ extern void __init init_smp_config (void);
 extern void smp_do_timer (struct pt_regs *regs);
 extern void smp_send_reschedule (int cpu);
-extern void lock_ipi_calllock(void);
-extern void unlock_ipi_calllock(void);
 extern void identify_siblings (struct cpuinfo_ia64 *);
 extern int is_multithreading_enabled(void);
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi(cpumask_t mask);
 #else /* CONFIG_SMP */
 #define cpu_logical_id(i)               0
diff --git a/include/asm-m32r/smp.h b/include/asm-m32r/smp.h
index 078e1a51a042..c5dd66916692 100644
--- a/include/asm-m32r/smp.h
+++ b/include/asm-m32r/smp.h
@@ -89,6 +89,9 @@ static __inline__ unsigned int num_booting_cpus(void)
 extern void smp_send_timer(void);
 extern unsigned long send_IPI_mask_phys(cpumask_t, int, int);
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi(cpumask_t mask);
 #endif  /* not __ASSEMBLY__ */
 #define NO_PROC_ID (0xff)       /* No processor magic marker */
@@ -104,6 +107,7 @@ extern unsigned long send_IPI_mask_phys(cpumask_t, int, int);
 #define LOCAL_TIMER_IPI         (M32R_IRQ_IPI3-M32R_IRQ_IPI0)
 #define INVALIDATE_CACHE_IPI    (M32R_IRQ_IPI4-M32R_IRQ_IPI0)
 #define CPU_BOOT_IPI            (M32R_IRQ_IPI5-M32R_IRQ_IPI0)
+#define CALL_FUNC_SINGLE_IPI    (M32R_IRQ_IPI6-M32R_IRQ_IPI0)
 #define IPI_SHIFT       (0)
 #define NR_IPIS         (8)
diff --git a/include/asm-mips/smp.h b/include/asm-mips/smp.h
index 84fef1aeec0c..0ff5b523ea77 100644
--- a/include/asm-mips/smp.h
+++ b/include/asm-mips/smp.h
@@ -35,16 +35,6 @@ extern int __cpu_logical_map[NR_CPUS];
 #define NO_PROC_ID      (-1)
-struct call_data_struct {
-        void            (*func)(void *);
-        void            *info;
-        atomic_t        started;
-        atomic_t        finished;
-        int             wait;
-};
-extern struct call_data_struct *call_data;
 #define SMP_RESCHEDULE_YOURSELF 0x1     /* XXX braindead */
 #define SMP_CALL_FUNCTION       0x2
@@ -67,4 +57,7 @@ static inline void smp_send_reschedule(int cpu)
 extern asmlinkage void smp_call_function_interrupt(void);
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi(cpumask_t mask);
 #endif /* __ASM_SMP_H */
diff --git a/include/asm-parisc/smp.h b/include/asm-parisc/smp.h
index 306f4950e32e..398cdbaf4e54 100644
--- a/include/asm-parisc/smp.h
+++ b/include/asm-parisc/smp.h
@@ -30,6 +30,9 @@ extern cpumask_t cpu_online_map;
 extern void smp_send_reschedule(int cpu);
 extern void smp_send_all_nop(void);
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi(cpumask_t mask);
 #endif /* !ASSEMBLY */
 /*
diff --git a/include/asm-powerpc/smp.h b/include/asm-powerpc/smp.h
index 505f35bacaa9..c663a1fa77c5 100644
--- a/include/asm-powerpc/smp.h
+++ b/include/asm-powerpc/smp.h
@@ -67,10 +67,7 @@ DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
 * in /proc/interrupts will be wrong!!! --Troy */
 #define PPC_MSG_CALL_FUNCTION   0
 #define PPC_MSG_RESCHEDULE      1
-/* This is unused now */
+#define PPC_MSG_CALL_FUNC_SINGLE        2
-#if 0
-#define PPC_MSG_MIGRATE_TASK    2
-#endif
 #define PPC_MSG_DEBUGGER_BREAK  3
 void smp_init_iSeries(void);
@@ -117,6 +114,9 @@ extern void smp_generic_take_timebase(void);
 extern struct smp_ops_t *smp_ops;
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi(cpumask_t mask);
 #endif /* __ASSEMBLY__ */
 #endif /* __KERNEL__ */
diff --git a/include/asm-sh/smp.h b/include/asm-sh/smp.h
index 9c8d34b07ebf..593343cd26ee 100644
--- a/include/asm-sh/smp.h
+++ b/include/asm-sh/smp.h
@@ -26,18 +26,10 @@ extern int __cpu_logical_map[NR_CPUS];
 #define NO_PROC_ID      (-1)
-struct smp_fn_call_struct {
-        spinlock_t lock;
-        atomic_t   finished;
-        void (*fn)(void *);
-        void *data;
-};
-extern struct smp_fn_call_struct smp_fn_call;
 #define SMP_MSG_FUNCTION        0
 #define SMP_MSG_RESCHEDULE      1
-#define SMP_MSG_NR              2
+#define SMP_MSG_FUNCTION_SINGLE 2
+#define SMP_MSG_NR              3
 void plat_smp_setup(void);
 void plat_prepare_cpus(unsigned int max_cpus);
@@ -46,6 +38,8 @@ void plat_start_cpu(unsigned int cpu, unsigned long entry_point);
 void plat_send_ipi(unsigned int cpu, unsigned int message);
 int plat_register_ipi_handler(unsigned int message,
                              void (*handler)(void *), void *arg);
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi(cpumask_t mask);
 #else
diff --git a/include/asm-sparc/smp.h b/include/asm-sparc/smp.h
index e6d561599726..b61e74bea06a 100644
--- a/include/asm-sparc/smp.h
+++ b/include/asm-sparc/smp.h
@@ -72,7 +72,7 @@ static inline void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2,
                           unsigned long arg3, unsigned long arg4, unsigned long arg5)
 { smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); }
-static inline int smp_call_function(void (*func)(void *info), void *info, int nonatomic, int wait)
+static inline int smp_call_function(void (*func)(void *info), void *info, int wait)
 {
        xc1((smpfunc_t)func, (unsigned long)info);
        return 0;
diff --git a/include/asm-x86/hw_irq.h b/include/asm-x86/hw_irq.h
index 18f067c310f7..77ba51df5668 100644
--- a/include/asm-x86/hw_irq.h
+++ b/include/asm-x86/hw_irq.h
@@ -48,6 +48,7 @@ extern void irq_move_cleanup_interrupt(void);
 extern void threshold_interrupt(void);
 extern void call_function_interrupt(void);
+extern void call_function_single_interrupt(void);
 /* PIC specific functions */
 extern void disable_8259A_irq(unsigned int irq);
diff --git a/include/asm-x86/irq_vectors.h b/include/asm-x86/irq_vectors.h
index 0ac864ef3cd4..90b1d1f12f08 100644
--- a/include/asm-x86/irq_vectors.h
+++ b/include/asm-x86/irq_vectors.h
@@ -64,6 +64,7 @@
 # define INVALIDATE_TLB_VECTOR          0xfd
 # define RESCHEDULE_VECTOR              0xfc
 # define CALL_FUNCTION_VECTOR           0xfb
+# define CALL_FUNCTION_SINGLE_VECTOR    0xfa
 # define THERMAL_APIC_VECTOR            0xf0
 #else
@@ -72,6 +73,7 @@
 #define ERROR_APIC_VECTOR               0xfe
 #define RESCHEDULE_VECTOR               0xfd
 #define CALL_FUNCTION_VECTOR            0xfc
+#define CALL_FUNCTION_SINGLE_VECTOR     0xfb
 #define THERMAL_APIC_VECTOR             0xfa
 #define THRESHOLD_APIC_VECTOR           0xf9
 #define INVALIDATE_TLB_VECTOR_END       0xf7
@@ -143,6 +145,7 @@
 #define VIC_RESCHEDULE_CPI              4
 #define VIC_ENABLE_IRQ_CPI              5
 #define VIC_CALL_FUNCTION_CPI           6
+#define VIC_CALL_FUNCTION_SINGLE_CPI    7
 /* Now the QIC CPIs:  Since we don't need the two initial levels,
 * these are 2 less than the VIC CPIs */
@@ -152,9 +155,10 @@
 #define QIC_RESCHEDULE_CPI              (VIC_RESCHEDULE_CPI - QIC_CPI_OFFSET)
 #define QIC_ENABLE_IRQ_CPI              (VIC_ENABLE_IRQ_CPI - QIC_CPI_OFFSET)
 #define QIC_CALL_FUNCTION_CPI           (VIC_CALL_FUNCTION_CPI - QIC_CPI_OFFSET)
+#define QIC_CALL_FUNCTION_SINGLE_CPI    (VIC_CALL_FUNCTION_SINGLE_CPI - QIC_CPI_OFFSET)
 #define VIC_START_FAKE_CPI              VIC_TIMER_CPI
-#define VIC_END_FAKE_CPI                VIC_CALL_FUNCTION_CPI
+#define VIC_END_FAKE_CPI                VIC_CALL_FUNCTION_SINGLE_CPI
 /* this is the SYS_INT CPI. */
 #define VIC_SYS_INT                     8
diff --git a/include/asm-x86/mach-default/entry_arch.h b/include/asm-x86/mach-default/entry_arch.h
index bc861469bdba..9283b60a1dd2 100644
--- a/include/asm-x86/mach-default/entry_arch.h
+++ b/include/asm-x86/mach-default/entry_arch.h
@@ -13,6 +13,7 @@
 BUILD_INTERRUPT(reschedule_interrupt,RESCHEDULE_VECTOR)
 BUILD_INTERRUPT(invalidate_interrupt,INVALIDATE_TLB_VECTOR)
 BUILD_INTERRUPT(call_function_interrupt,CALL_FUNCTION_VECTOR)
+BUILD_INTERRUPT(call_function_single_interrupt,CALL_FUNCTION_SINGLE_VECTOR)
 #endif
 /*
diff --git a/include/asm-x86/mach-visws/entry_arch.h b/include/asm-x86/mach-visws/entry_arch.h
index b183fa6d83d9..86be554342d4 100644
--- a/include/asm-x86/mach-visws/entry_arch.h
+++ b/include/asm-x86/mach-visws/entry_arch.h
@@ -1,23 +1,5 @@
 /*
- * The following vectors are part of the Linux architecture, there
+ * VISWS uses the standard Linux entry points:
- * is no hardware IRQ pin equivalent for them, they are triggered
- * through the ICC by us (IPIs)
 */
-#ifdef CONFIG_X86_SMP
-BUILD_INTERRUPT(reschedule_interrupt,RESCHEDULE_VECTOR)
-BUILD_INTERRUPT(invalidate_interrupt,INVALIDATE_TLB_VECTOR)
-BUILD_INTERRUPT(call_function_interrupt,CALL_FUNCTION_VECTOR)
-#endif
-/*
+#include "../mach-default/entry_arch.h"
- * every pentium local APIC has two 'local interrupts', with a
- * soft-definable vector attached to both interrupts, one of
- * which is a timer interrupt, the other one is error counter
- * overflow. Linux uses the local APIC timer interrupt to get
- * a much simpler SMP time architecture:
- */
-#ifdef CONFIG_X86_LOCAL_APIC
-BUILD_INTERRUPT(apic_timer_interrupt,LOCAL_TIMER_VECTOR)
-BUILD_INTERRUPT(error_interrupt,ERROR_APIC_VECTOR)
-BUILD_INTERRUPT(spurious_interrupt,SPURIOUS_APIC_VECTOR)
-#endif
diff --git a/include/asm-x86/mach-voyager/entry_arch.h b/include/asm-x86/mach-voyager/entry_arch.h
index 4a1e1e8c10b6..ae52624b5937 100644
--- a/include/asm-x86/mach-voyager/entry_arch.h
+++ b/include/asm-x86/mach-voyager/entry_arch.h
@@ -23,4 +23,4 @@ BUILD_INTERRUPT(qic_invalidate_interrupt, QIC_INVALIDATE_CPI);
 BUILD_INTERRUPT(qic_reschedule_interrupt, QIC_RESCHEDULE_CPI);
 BUILD_INTERRUPT(qic_enable_irq_interrupt, QIC_ENABLE_IRQ_CPI);
 BUILD_INTERRUPT(qic_call_function_interrupt, QIC_CALL_FUNCTION_CPI);
+BUILD_INTERRUPT(qic_call_function_single_interrupt, QIC_CALL_FUNCTION_SINGLE_CPI);
diff --git a/include/asm-x86/smp.h b/include/asm-x86/smp.h
index 2e221f1ce0b2..c2784b3e0b77 100644
--- a/include/asm-x86/smp.h
+++ b/include/asm-x86/smp.h
@@ -50,9 +50,9 @@ struct smp_ops {
        void (*smp_send_stop)(void);
        void (*smp_send_reschedule)(int cpu);
-        int (*smp_call_function_mask)(cpumask_t mask,
-                                      void (*func)(void *info), void *info,
+        void (*send_call_func_ipi)(cpumask_t mask);
-                                      int wait);
+        void (*send_call_func_single_ipi)(int cpu);
 };
 /* Globals due to paravirt */
@@ -94,17 +94,22 @@ static inline void smp_send_reschedule(int cpu)
        smp_ops.smp_send_reschedule(cpu);
 }
-static inline int smp_call_function_mask(cpumask_t mask,
+static inline void arch_send_call_function_single_ipi(int cpu)
-                                         void (*func) (void *info), void *info,
+{
-                                         int wait)
+        smp_ops.send_call_func_single_ipi(cpu);
+}
+static inline void arch_send_call_function_ipi(cpumask_t mask)
 {
-        return smp_ops.smp_call_function_mask(mask, func, info, wait);
+        smp_ops.send_call_func_ipi(mask);
 }
 void native_smp_prepare_boot_cpu(void);
 void native_smp_prepare_cpus(unsigned int max_cpus);
 void native_smp_cpus_done(unsigned int max_cpus);
 int native_cpu_up(unsigned int cpunum);
+void native_send_call_func_ipi(cpumask_t mask);
+void native_send_call_func_single_ipi(int cpu);
 extern int __cpu_disable(void);
 extern void __cpu_die(unsigned int cpu);
@@ -197,7 +202,5 @@ static inline int hard_smp_processor_id(void)
 extern void cpu_uninit(void);
 #endif
-extern void lock_ipi_call_lock(void);
-extern void unlock_ipi_call_lock(void);
 #endif /* __ASSEMBLY__ */
 #endif
diff --git a/include/asm-x86/xen/events.h b/include/asm-x86/xen/events.h
index 596312a7bfc9..f8d57ea1f05f 100644
--- a/include/asm-x86/xen/events.h
+++ b/include/asm-x86/xen/events.h
@@ -4,6 +4,7 @@
 enum ipi_vector {
        XEN_RESCHEDULE_VECTOR,
        XEN_CALL_FUNCTION_VECTOR,
+        XEN_CALL_FUNCTION_SINGLE_VECTOR,
        XEN_NR_IPIS,
 };
diff --git a/include/linux/smp.h b/include/linux/smp.h
index 55232ccf9cfd..48262f86c969 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -7,9 +7,18 @@
 */
 #include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/cpumask.h>
 extern void cpu_idle(void);
+struct call_single_data {
+        struct list_head list;
+        void (*func) (void *info);
+        void *info;
+        unsigned int flags;
+};
 #ifdef CONFIG_SMP
 #include <linux/preempt.h>
@@ -52,15 +61,34 @@ extern void smp_cpus_done(unsigned int max_cpus);
 /*
 * Call a function on all other processors
 */
-int smp_call_function(void(*func)(void *info), void *info, int retry, int wait);
+int smp_call_function(void(*func)(void *info), void *info, int wait);
+int smp_call_function_mask(cpumask_t mask, void(*func)(void *info), void *info,
+                                int wait);
 int smp_call_function_single(int cpuid, void (*func) (void *info), void *info,
-                                int retry, int wait);
+                                int wait);
+void __smp_call_function_single(int cpuid, struct call_single_data *data);
+/*
+ * Generic and arch helpers
+ */
+#ifdef CONFIG_USE_GENERIC_SMP_HELPERS
+void generic_smp_call_function_single_interrupt(void);
+void generic_smp_call_function_interrupt(void);
+void init_call_single_data(void);
+void ipi_call_lock(void);
+void ipi_call_unlock(void);
+void ipi_call_lock_irq(void);
+void ipi_call_unlock_irq(void);
+#else
+static inline void init_call_single_data(void)
+{
+}
+#endif
 /*
 * Call a function on all processors
 */
-int on_each_cpu(void (*func) (void *info), void *info, int retry, int wait);
+int on_each_cpu(void (*func) (void *info), void *info, int wait);
 #define MSG_ALL_BUT_SELF        0x8000  /* Assume <32768 CPU's */
 #define MSG_ALL                 0x8001
@@ -90,9 +118,9 @@ static inline int up_smp_call_function(void (*func)(void *), void *info)
 {
        return 0;
 }
-#define smp_call_function(func, info, retry, wait) \
+#define smp_call_function(func, info, wait) \
                        (up_smp_call_function(func, info))
-#define on_each_cpu(func,info,retry,wait)       \
+#define on_each_cpu(func,info,wait)             \
        ({                                      \
                local_irq_disable();            \
                func(info);                     \
@@ -102,7 +130,7 @@ static inline int up_smp_call_function(void (*func)(void *), void *info)
 static inline void smp_send_reschedule(int cpu) { }
 #define num_booting_cpus()                      1
 #define smp_prepare_boot_cpu()                  do {} while (0)
-#define smp_call_function_single(cpuid, func, info, retry, wait) \
+#define smp_call_function_single(cpuid, func, info, wait) \
 ({ \
        WARN_ON(cpuid != 0);    \
        local_irq_disable();    \
@@ -112,7 +140,9 @@ static inline void smp_send_reschedule(int cpu) { }
 })
 #define smp_call_function_mask(mask, func, info, wait) \
                        (up_smp_call_function(func, info))
+static inline void init_call_single_data(void)
+{
+}
 #endif /* !SMP */
 /*
diff --git a/init/main.c b/init/main.c
index a9cc3e0803de..edeace036fd9 100644
--- a/init/main.c
+++ b/init/main.c
@@ -31,6 +31,7 @@
 #include <linux/kernel_stat.h>
 #include <linux/start_kernel.h>
 #include <linux/security.h>
+#include <linux/smp.h>
 #include <linux/workqueue.h>
 #include <linux/profile.h>
 #include <linux/rcupdate.h>
@@ -780,6 +781,7 @@ static void __init do_pre_smp_initcalls(void)
 {
        extern int spawn_ksoftirqd(void);
+        init_call_single_data();
        migration_init();
        spawn_ksoftirqd();
        if (!nosoftlockup)
diff --git a/kernel/Makefile b/kernel/Makefile
index f6328e16dfdd..0a7ed838984b 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_RT_MUTEXES) += rtmutex.o
 obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o
 obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o
 obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
+obj-$(CONFIG_USE_GENERIC_SMP_HELPERS) += smp.o
 obj-$(CONFIG_SMP) += spinlock.o
 obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o
 obj-$(CONFIG_PROVE_LOCKING) += spinlock.o
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 2913a8bff612..b8e4dce80a74 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -622,7 +622,7 @@ static void retrigger_next_event(void *arg)
 void clock_was_set(void)
 {
        /* Retrigger the CPU local events everywhere */
-        on_each_cpu(retrigger_next_event, NULL, 0, 1);
+        on_each_cpu(retrigger_next_event, NULL, 1);
 }
 /*
diff --git a/kernel/profile.c b/kernel/profile.c
index ae7ead82cbc9..58926411eb2a 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -252,7 +252,7 @@ static void profile_flip_buffers(void)
        mutex_lock(&profile_flip_mutex);
        j = per_cpu(cpu_profile_flip, get_cpu());
        put_cpu();
-        on_each_cpu(__profile_flip_buffers, NULL, 0, 1);
+        on_each_cpu(__profile_flip_buffers, NULL, 1);
        for_each_online_cpu(cpu) {
                struct profile_hit *hits = per_cpu(cpu_profile_hits, cpu)[j];
                for (i = 0; i < NR_PROFILE_HIT; ++i) {
@@ -275,7 +275,7 @@ static void profile_discard_flip_buffers(void)
        mutex_lock(&profile_flip_mutex);
        i = per_cpu(cpu_profile_flip, get_cpu());
        put_cpu();
-        on_each_cpu(__profile_flip_buffers, NULL, 0, 1);
+        on_each_cpu(__profile_flip_buffers, NULL, 1);
        for_each_online_cpu(cpu) {
                struct profile_hit *hits = per_cpu(cpu_profile_hits, cpu)[i];
                memset(hits, 0, NR_PROFILE_HIT*sizeof(struct profile_hit));
@@ -558,7 +558,7 @@ static int __init create_hash_tables(void)
 out_cleanup:
        prof_on = 0;
        smp_mb();
-        on_each_cpu(profile_nop, NULL, 0, 1);
+        on_each_cpu(profile_nop, NULL, 1);
        for_each_online_cpu(cpu) {
                struct page *page;
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index 4a74b8d48d90..f14f372cf6f5 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -128,7 +128,7 @@ static void _rcu_barrier(enum rcu_barrier type)
         * until all the callbacks are queued.
         */
        rcu_read_lock();
-        on_each_cpu(rcu_barrier_func, (void *)type, 0, 1);
+        on_each_cpu(rcu_barrier_func, (void *)type, 1);
        rcu_read_unlock();
        wait_for_completion(&rcu_barrier_completion);
        mutex_unlock(&rcu_barrier_mutex);
diff --git a/kernel/smp.c b/kernel/smp.c
new file mode 100644
index 000000000000..ab10793b0707
--- /dev/null
+++ b/kernel/smp.c
@@ -0,0 +1,382 @@
+/*
+ * Generic helpers for smp ipi calls
+ *
+ * (C) Jens Axboe <jens.axboe@oracle.com> 2008
+ *
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/percpu.h>
+#include <linux/rcupdate.h>
+#include <linux/rculist.h>
+#include <linux/smp.h>
+static DEFINE_PER_CPU(struct call_single_queue, call_single_queue);
+static LIST_HEAD(call_function_queue);
+__cacheline_aligned_in_smp DEFINE_SPINLOCK(call_function_lock);
+enum {
+        CSD_FLAG_WAIT           = 0x01,
+        CSD_FLAG_ALLOC          = 0x02,
+};
+struct call_function_data {
+        struct call_single_data csd;
+        spinlock_t lock;
+        unsigned int refs;
+        cpumask_t cpumask;
+        struct rcu_head rcu_head;
+};
+struct call_single_queue {
+        struct list_head list;
+        spinlock_t lock;
+};
+void __cpuinit init_call_single_data(void)
+{
+        int i;
+        for_each_possible_cpu(i) {
+                struct call_single_queue *q = &per_cpu(call_single_queue, i);
+                spin_lock_init(&q->lock);
+                INIT_LIST_HEAD(&q->list);
+        }
+}
+static void csd_flag_wait(struct call_single_data *data)
+{
+        /* Wait for response */
+        do {
+                /*
+                 * We need to see the flags store in the IPI handler
+                 */
+                smp_mb();
+                if (!(data->flags & CSD_FLAG_WAIT))
+                        break;
+                cpu_relax();
+        } while (1);
+}
+/*
+ * Insert a previously allocated call_single_data element for execution
+ * on the given CPU. data must already have ->func, ->info, and ->flags set.
+ */
+static void generic_exec_single(int cpu, struct call_single_data *data)
+{
+        struct call_single_queue *dst = &per_cpu(call_single_queue, cpu);
+        int wait = data->flags & CSD_FLAG_WAIT, ipi;
+        unsigned long flags;
+        spin_lock_irqsave(&dst->lock, flags);
+        ipi = list_empty(&dst->list);
+        list_add_tail(&data->list, &dst->list);
+        spin_unlock_irqrestore(&dst->lock, flags);
+        if (ipi)
+                arch_send_call_function_single_ipi(cpu);
+        if (wait)
+                csd_flag_wait(data);
+}
+static void rcu_free_call_data(struct rcu_head *head)
+{
+        struct call_function_data *data;
+        data = container_of(head, struct call_function_data, rcu_head);
+        kfree(data);
+}
+/*
+ * Invoked by arch to handle an IPI for call function. Must be called with
+ * interrupts disabled.
+ */
+void generic_smp_call_function_interrupt(void)
+{
+        struct call_function_data *data;
+        int cpu = get_cpu();
+        /*
+         * It's ok to use list_for_each_rcu() here even though we may delete
+         * 'pos', since list_del_rcu() doesn't clear ->next
+         */
+        rcu_read_lock();
+        list_for_each_entry_rcu(data, &call_function_queue, csd.list) {
+                int refs;
+                if (!cpu_isset(cpu, data->cpumask))
+                        continue;
+                data->csd.func(data->csd.info);
+                spin_lock(&data->lock);
+                cpu_clear(cpu, data->cpumask);
+                WARN_ON(data->refs == 0);
+                data->refs--;
+                refs = data->refs;
+                spin_unlock(&data->lock);
+                if (refs)
+                        continue;
+                spin_lock(&call_function_lock);
+                list_del_rcu(&data->csd.list);
+                spin_unlock(&call_function_lock);
+                if (data->csd.flags & CSD_FLAG_WAIT) {
+                        /*
+                         * serialize stores to data with the flag clear
+                         * and wakeup
+                         */
+                        smp_wmb();
+                        data->csd.flags &= ~CSD_FLAG_WAIT;
+                } else
+                        call_rcu(&data->rcu_head, rcu_free_call_data);
+        }
+        rcu_read_unlock();
+        put_cpu();
+}
+/*
+ * Invoked by arch to handle an IPI for call function single. Must be called
+ * from the arch with interrupts disabled.
+ */
+void generic_smp_call_function_single_interrupt(void)
+{
+        struct call_single_queue *q = &__get_cpu_var(call_single_queue);
+        LIST_HEAD(list);
+        /*
+         * Need to see other stores to list head for checking whether
+         * list is empty without holding q->lock
+         */
+        smp_mb();
+        while (!list_empty(&q->list)) {
+                unsigned int data_flags;
+                spin_lock(&q->lock);
+                list_replace_init(&q->list, &list);
+                spin_unlock(&q->lock);
+                while (!list_empty(&list)) {
+                        struct call_single_data *data;
+                        data = list_entry(list.next, struct call_single_data,
+                                                list);
+                        list_del(&data->list);
+                        /*
+                         * 'data' can be invalid after this call if
+                         * flags == 0 (when called through
+                         * generic_exec_single(), so save them away before
+                         * making the call.
+                         */
+                        data_flags = data->flags;
+                        data->func(data->info);
+                        if (data_flags & CSD_FLAG_WAIT) {
+                                smp_wmb();
+                                data->flags &= ~CSD_FLAG_WAIT;
+                        } else if (data_flags & CSD_FLAG_ALLOC)
+                                kfree(data);
+                }
+                /*
+                 * See comment on outer loop
+                 */
+                smp_mb();
+        }
+}
+/*
+ * smp_call_function_single - Run a function on a specific CPU
+ * @func: The function to run. This must be fast and non-blocking.
+ * @info: An arbitrary pointer to pass to the function.
+ * @wait: If true, wait until function has completed on other CPUs.
+ *
+ * Returns 0 on success, else a negative status code. Note that @wait
+ * will be implicitly turned on in case of allocation failures, since
+ * we fall back to on-stack allocation.
+ */
+int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
+                             int wait)
+{
+        struct call_single_data d;
+        unsigned long flags;
+        /* prevent preemption and reschedule on another processor */
+        int me = get_cpu();
+        /* Can deadlock when called with interrupts disabled */
+        WARN_ON(irqs_disabled());
+        if (cpu == me) {
+                local_irq_save(flags);
+                func(info);
+                local_irq_restore(flags);
+        } else {
+                struct call_single_data *data = NULL;
+                if (!wait) {
+                        data = kmalloc(sizeof(*data), GFP_ATOMIC);
+                        if (data)
+                                data->flags = CSD_FLAG_ALLOC;
+                }
+                if (!data) {
+                        data = &d;
+                        data->flags = CSD_FLAG_WAIT;
+                }
+                data->func = func;
+                data->info = info;
+                generic_exec_single(cpu, data);
+        }
+        put_cpu();
+        return 0;
+}
+EXPORT_SYMBOL(smp_call_function_single);
+/**
+ * __smp_call_function_single(): Run a function on another CPU
+ * @cpu: The CPU to run on.
+ * @data: Pre-allocated and setup data structure
+ *
+ * Like smp_call_function_single(), but allow caller to pass in a pre-allocated
+ * data structure. Useful for embedding @data inside other structures, for
+ * instance.
+ *
+ */
+void __smp_call_function_single(int cpu, struct call_single_data *data)
+{
+        /* Can deadlock when called with interrupts disabled */
+        WARN_ON((data->flags & CSD_FLAG_WAIT) && irqs_disabled());
+        generic_exec_single(cpu, data);
+}
+/**
+ * smp_call_function_mask(): Run a function on a set of other CPUs.
+ * @mask: The set of cpus to run on.
+ * @func: The function to run. This must be fast and non-blocking.
+ * @info: An arbitrary pointer to pass to the function.
+ * @wait: If true, wait (atomically) until function has completed on other CPUs.
+ *
+ * Returns 0 on success, else a negative status code.
+ *
+ * If @wait is true, then returns once @func has returned. Note that @wait
+ * will be implicitly turned on in case of allocation failures, since
+ * we fall back to on-stack allocation.
+ *
+ * You must not call this function with disabled interrupts or from a
+ * hardware interrupt handler or from a bottom half handler. Preemption
+ * must be disabled when calling this function.
+ */
+int smp_call_function_mask(cpumask_t mask, void (*func)(void *), void *info,
+                           int wait)
+{
+        struct call_function_data d;
+        struct call_function_data *data = NULL;
+        cpumask_t allbutself;
+        unsigned long flags;
+        int cpu, num_cpus;
+        /* Can deadlock when called with interrupts disabled */
+        WARN_ON(irqs_disabled());
+        cpu = smp_processor_id();
+        allbutself = cpu_online_map;
+        cpu_clear(cpu, allbutself);
+        cpus_and(mask, mask, allbutself);
+        num_cpus = cpus_weight(mask);
+        /*
+         * If zero CPUs, return. If just a single CPU, turn this request
+         * into a targetted single call instead since it's faster.
+         */
+        if (!num_cpus)
+                return 0;
+        else if (num_cpus == 1) {
+                cpu = first_cpu(mask);
+                return smp_call_function_single(cpu, func, info, wait);
+        }
+        if (!wait) {
+                data = kmalloc(sizeof(*data), GFP_ATOMIC);
+                if (data)
+                        data->csd.flags = CSD_FLAG_ALLOC;
+        }
+        if (!data) {
+                data = &d;
+                data->csd.flags = CSD_FLAG_WAIT;
+        }
+        spin_lock_init(&data->lock);
+        data->csd.func = func;
+        data->csd.info = info;
+        data->refs = num_cpus;
+        data->cpumask = mask;
+        spin_lock_irqsave(&call_function_lock, flags);
+        list_add_tail_rcu(&data->csd.list, &call_function_queue);
+        spin_unlock_irqrestore(&call_function_lock, flags);
+        /* Send a message to all CPUs in the map */
+        arch_send_call_function_ipi(mask);
+        /* optionally wait for the CPUs to complete */
+        if (wait)
+                csd_flag_wait(&data->csd);
+        return 0;
+}
+EXPORT_SYMBOL(smp_call_function_mask);
+/**
+ * smp_call_function(): Run a function on all other CPUs.
+ * @func: The function to run. This must be fast and non-blocking.
+ * @info: An arbitrary pointer to pass to the function.
+ * @wait: If true, wait (atomically) until function has completed on other CPUs.
+ *
+ * Returns 0 on success, else a negative status code.
+ *
+ * If @wait is true, then returns once @func has returned; otherwise
+ * it returns just before the target cpu calls @func. In case of allocation
+ * failure, @wait will be implicitly turned on.
+ *
+ * You must not call this function with disabled interrupts or from a
+ * hardware interrupt handler or from a bottom half handler.
+ */
+int smp_call_function(void (*func)(void *), void *info, int wait)
+{
+        int ret;
+        preempt_disable();
+        ret = smp_call_function_mask(cpu_online_map, func, info, wait);
+        preempt_enable();
+        return ret;
+}
+EXPORT_SYMBOL(smp_call_function);
+void ipi_call_lock(void)
+{
+        spin_lock(&call_function_lock);
+}
+void ipi_call_unlock(void)
+{
+        spin_unlock(&call_function_lock);
+}
+void ipi_call_lock_irq(void)
+{
+        spin_lock_irq(&call_function_lock);
+}
+void ipi_call_unlock_irq(void)
+{
+        spin_unlock_irq(&call_function_lock);
+}
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 3e9e896fdc5b..81e2fe0f983a 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -645,12 +645,12 @@ __init int spawn_ksoftirqd(void)
 /*
 * Call a function on all processors
 */
-int on_each_cpu(void (*func) (void *info), void *info, int retry, int wait)
+int on_each_cpu(void (*func) (void *info), void *info, int wait)
 {
        int ret = 0;
        preempt_disable();
-        ret = smp_call_function(func, info, retry, wait);
+        ret = smp_call_function(func, info, wait);
        local_irq_disable();
        func(info);
        local_irq_enable();
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index 67f80c261709..f48d0f09d32f 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -268,7 +268,7 @@ void tick_broadcast_on_off(unsigned long reason, int *oncpu)
                       "offline CPU #%d\n", *oncpu);
        else
                smp_call_function_single(*oncpu, tick_do_broadcast_on_off,
-                                         &reason, 1, 1);
+                                         &reason, 1);
 }
 /*
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f024b9b3a2a6..79ac4afc908c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -918,7 +918,7 @@ void drain_local_pages(void *arg)
 */
 void drain_all_pages(void)
 {
-        on_each_cpu(drain_local_pages, NULL, 0, 1);
+        on_each_cpu(drain_local_pages, NULL, 1);
 }
 #ifdef CONFIG_HIBERNATION
diff --git a/mm/slab.c b/mm/slab.c
index b4aa4c88250e..052e7d64537e 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2446,7 +2446,7 @@ static void drain_cpu_caches(struct kmem_cache *cachep)
        struct kmem_list3 *l3;
        int node;
-        on_each_cpu(do_drain, cachep, 1, 1);
+        on_each_cpu(do_drain, cachep, 1);
        check_irq_on();
        for_each_online_node(node) {
                l3 = cachep->nodelists[node];
@@ -3931,7 +3931,7 @@ static int do_tune_cpucache(struct kmem_cache *cachep, int limit,
        }
        new->cachep = cachep;
-        on_each_cpu(do_ccupdate_local, (void *)new, 1, 1);
+        on_each_cpu(do_ccupdate_local, (void *)new, 1);
        check_irq_on();
        cachep->batchcount = batchcount;
diff --git a/mm/slub.c b/mm/slub.c
index 488400d10700..35ab38a94b46 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1496,7 +1496,7 @@ static void flush_cpu_slab(void *d)
 static void flush_all(struct kmem_cache *s)
 {
 #ifdef CONFIG_SMP
-        on_each_cpu(flush_cpu_slab, s, 1, 1);
+        on_each_cpu(flush_cpu_slab, s, 1);
 #else
        unsigned long flags;
diff --git a/net/core/flow.c b/net/core/flow.c
index 19991175fdeb..5cf81052d044 100644
--- a/net/core/flow.c
+++ b/net/core/flow.c
@@ -298,7 +298,7 @@ void flow_cache_flush(void)
        init_completion(&info.completion);
        local_bh_disable();
-        smp_call_function(flow_cache_flush_per_cpu, &info, 1, 0);
+        smp_call_function(flow_cache_flush_per_cpu, &info, 0);
        flow_cache_flush_tasklet((unsigned long)&info);
        local_bh_enable();
diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
index 7f82b7616212..cc34ac769a3c 100644
--- a/net/iucv/iucv.c
+++ b/net/iucv/iucv.c
@@ -480,7 +480,7 @@ static void iucv_setmask_mp(void)
                if (cpu_isset(cpu, iucv_buffer_cpumask) &&
                    !cpu_isset(cpu, iucv_irq_cpumask))
                        smp_call_function_single(cpu, iucv_allow_cpu,
-                                                 NULL, 0, 1);
+                                                 NULL, 1);
        preempt_enable();
 }
@@ -498,7 +498,7 @@ static void iucv_setmask_up(void)
        cpumask = iucv_irq_cpumask;
        cpu_clear(first_cpu(iucv_irq_cpumask), cpumask);
        for_each_cpu_mask(cpu, cpumask)
-                smp_call_function_single(cpu, iucv_block_cpu, NULL, 0, 1);
+                smp_call_function_single(cpu, iucv_block_cpu, NULL, 1);
 }
 /**
@@ -523,7 +523,7 @@ static int iucv_enable(void)
        rc = -EIO;
        preempt_disable();
        for_each_online_cpu(cpu)
-                smp_call_function_single(cpu, iucv_declare_cpu, NULL, 0, 1);
+                smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1);
        preempt_enable();
        if (cpus_empty(iucv_buffer_cpumask))
                /* No cpu could declare an iucv buffer. */
@@ -545,7 +545,7 @@ out:
 */
 static void iucv_disable(void)
 {
-        on_each_cpu(iucv_retrieve_cpu, NULL, 0, 1);
+        on_each_cpu(iucv_retrieve_cpu, NULL, 1);
        kfree(iucv_path_table);
 }
@@ -580,7 +580,7 @@ static int __cpuinit iucv_cpu_notify(struct notifier_block *self,
        case CPU_ONLINE_FROZEN:
        case CPU_DOWN_FAILED:
        case CPU_DOWN_FAILED_FROZEN:
-                smp_call_function_single(cpu, iucv_declare_cpu, NULL, 0, 1);
+                smp_call_function_single(cpu, iucv_declare_cpu, NULL, 1);
                break;
        case CPU_DOWN_PREPARE:
        case CPU_DOWN_PREPARE_FROZEN:
@@ -589,10 +589,10 @@ static int __cpuinit iucv_cpu_notify(struct notifier_block *self,
                if (cpus_empty(cpumask))
                        /* Can't offline last IUCV enabled cpu. */
                        return NOTIFY_BAD;
-                smp_call_function_single(cpu, iucv_retrieve_cpu, NULL, 0, 1);
+                smp_call_function_single(cpu, iucv_retrieve_cpu, NULL, 1);
                if (cpus_empty(iucv_irq_cpumask))
                        smp_call_function_single(first_cpu(iucv_buffer_cpumask),
-                                                 iucv_allow_cpu, NULL, 0, 1);
+                                                 iucv_allow_cpu, NULL, 1);
                break;
        }
        return NOTIFY_OK;
@@ -652,7 +652,7 @@ static void iucv_cleanup_queue(void)
         * pending interrupts force them to the work queue by calling
         * an empty function on all cpus.
         */
-        smp_call_function(__iucv_cleanup_queue, NULL, 0, 1);
+        smp_call_function(__iucv_cleanup_queue, NULL, 1);
        spin_lock_irq(&iucv_queue_lock);
        list_for_each_entry_safe(p, n, &iucv_task_queue, list) {
                /* Remove stale work items from the task queue. */
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 2d29e260da3d..d4eae6af0738 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1266,12 +1266,12 @@ static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
        case CPU_UP_CANCELED:
                printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
                       cpu);
-                smp_call_function_single(cpu, hardware_disable, NULL, 0, 1);
+                smp_call_function_single(cpu, hardware_disable, NULL, 1);
                break;
        case CPU_ONLINE:
                printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
                       cpu);
-                smp_call_function_single(cpu, hardware_enable, NULL, 0, 1);
+                smp_call_function_single(cpu, hardware_enable, NULL, 1);
                break;
        }
        return NOTIFY_OK;
@@ -1286,7 +1286,7 @@ static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
                 * in vmx root mode.
                 */
                printk(KERN_INFO "kvm: exiting hardware virtualization\n");
-                on_each_cpu(hardware_disable, NULL, 0, 1);
+                on_each_cpu(hardware_disable, NULL, 1);
        }
        return NOTIFY_OK;
 }
@@ -1474,12 +1474,12 @@ int kvm_init(void *opaque, unsigned int vcpu_size,
        for_each_online_cpu(cpu) {
                smp_call_function_single(cpu,
                                kvm_arch_check_processor_compat,
-                                &r, 0, 1);
+                                &r, 1);
                if (r < 0)
                        goto out_free_1;
        }
-        on_each_cpu(hardware_enable, NULL, 0, 1);
+        on_each_cpu(hardware_enable, NULL, 1);
        r = register_cpu_notifier(&kvm_cpu_notifier);
        if (r)
                goto out_free_2;
@@ -1525,7 +1525,7 @@ out_free_3:
        unregister_reboot_notifier(&kvm_reboot_notifier);
        unregister_cpu_notifier(&kvm_cpu_notifier);
 out_free_2:
-        on_each_cpu(hardware_disable, NULL, 0, 1);
+        on_each_cpu(hardware_disable, NULL, 1);
 out_free_1:
        kvm_arch_hardware_unsetup();
 out_free_0:
@@ -1547,7 +1547,7 @@ void kvm_exit(void)
        sysdev_class_unregister(&kvm_sysdev_class);
        unregister_reboot_notifier(&kvm_reboot_notifier);
        unregister_cpu_notifier(&kvm_cpu_notifier);
-        on_each_cpu(hardware_disable, NULL, 0, 1);
+        on_each_cpu(hardware_disable, NULL, 1);
        kvm_arch_hardware_unsetup();
        kvm_arch_exit();
        kvm_exit_debug();
author	Linus Torvalds <torvalds@linux-foundation.org>	2008-07-15 17:02:33 -0400
committer	Linus Torvalds <torvalds@linux-foundation.org>	2008-07-15 17:12:03 -0400
commit	59190f4213462f191fc0d22d39b1cf18ea39ca39 (patch)
tree	8f30fa62ae7d8948e7974dfecede3d6a41ae3ec3
parent	64fd52a52077d3cd5a778ca031c0aaecf885eaa6 (diff)
parent	f6f88e9bfb6ced9871ed65ebe85c371de3c9e4be (diff)