sparc64: Convert to generic helpers for IPI function calls.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig
index 794d22f..1aeb1da 100644 (file)
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -16,6 +16,7 @@ config SPARC64
        select HAVE_IDE
        select HAVE_LMB
        select HAVE_ARCH_KGDB
+       select USE_GENERIC_SMP_HELPERS if SMP
 
 config GENERIC_TIME
        bool

diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index c099d96..7cf72b4 100644 (file)
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -788,89 +788,36 @@ static void smp_start_sync_tick_client(int cpu)
                              0, 0, 0, mask);
 }
 
-/* Send cross call to all processors except self. */
-#define smp_cross_call(func, ctx, data1, data2) \
-       smp_cross_call_masked(func, ctx, data1, data2, cpu_online_map)
-
-struct call_data_struct {
-       void (*func) (void *info);
-       void *info;
-       atomic_t finished;
-       int wait;
-};
-
-static struct call_data_struct *call_data;
-
 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.
- * @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.
- */
-static int sparc64_smp_call_function_mask(void (*func)(void *info), void *info,
-                                         int wait, cpumask_t mask)
+void arch_send_call_function_ipi(cpumask_t mask)
 {
-       struct call_data_struct data;
-       int cpus;
-
-       /* Can deadlock when called with interrupts disabled */
-       WARN_ON(irqs_disabled());
-
-       data.func = func;
-       data.info = info;
-       atomic_set(&data.finished, 0);
-       data.wait = wait;
-
-       spin_lock(&call_lock);
-
-       cpu_clear(smp_processor_id(), mask);
-       cpus = cpus_weight(mask);
-       if (!cpus)
-               goto out_unlock;
-
-       call_data = &data;
-       mb();
-
        smp_cross_call_masked(&xcall_call_function, 0, 0, 0, mask);
+}
 
-       /* Wait for response */
-       while (atomic_read(&data.finished) != cpus)
-               cpu_relax();
+extern unsigned long xcall_call_function_single;
 
-out_unlock:
-       spin_unlock(&call_lock);
+void arch_send_call_function_single_ipi(int cpu)
+{
+       cpumask_t mask = cpumask_of_cpu(cpu);
 
-       return 0;
+       smp_cross_call_masked(&xcall_call_function_single, 0, 0, 0, mask);
 }
 
-int smp_call_function(void (*func)(void *info), void *info, int wait)
-{
-       return sparc64_smp_call_function_mask(func, info, wait, cpu_online_map);
-}
+/* Send cross call to all processors except self. */
+#define smp_cross_call(func, ctx, data1, data2) \
+       smp_cross_call_masked(func, ctx, data1, data2, cpu_online_map)
 
 void smp_call_function_client(int irq, struct pt_regs *regs)
 {
-       void (*func) (void *info) = call_data->func;
-       void *info = call_data->info;
+       clear_softint(1 << irq);
+       generic_smp_call_function_interrupt();
+}
 
+void smp_call_function_single_client(int irq, struct pt_regs *regs)
+{
        clear_softint(1 << irq);
-       if (call_data->wait) {
-               /* let initiator proceed only after completion */
-               func(info);
-               atomic_inc(&call_data->finished);
-       } else {
-               /* let initiator proceed after getting data */
-               atomic_inc(&call_data->finished);
-               func(info);
-       }
+       generic_smp_call_function_single_interrupt();
 }
 
 static void tsb_sync(void *info)
@@ -890,7 +837,7 @@ static void tsb_sync(void *info)
 
 void smp_tsb_sync(struct mm_struct *mm)
 {
-       sparc64_smp_call_function_mask(tsb_sync, mm, 1, mm->cpu_vm_mask);
+       smp_call_function_mask(mm->cpu_vm_mask, tsb_sync, mm, 1);
 }
 
 extern unsigned long xcall_flush_tlb_mm;

diff --git a/arch/sparc64/kernel/sparc64_ksyms.c b/arch/sparc64/kernel/sparc64_ksyms.c
index 49d3ea5..504e678 100644 (file)
--- a/arch/sparc64/kernel/sparc64_ksyms.c
+++ b/arch/sparc64/kernel/sparc64_ksyms.c
@@ -108,8 +108,6 @@ EXPORT_SYMBOL(__read_unlock);
 EXPORT_SYMBOL(__write_lock);
 EXPORT_SYMBOL(__write_unlock);
 EXPORT_SYMBOL(__write_trylock);
-
-EXPORT_SYMBOL(smp_call_function);
 #endif /* CONFIG_SMP */
 
 #ifdef CONFIG_MCOUNT

diff --git a/arch/sparc64/kernel/ttable.S b/arch/sparc64/kernel/ttable.S
index 450053a..1ade3d6 100644 (file)
--- a/arch/sparc64/kernel/ttable.S
+++ b/arch/sparc64/kernel/ttable.S
@@ -58,7 +58,12 @@ tl0_irq3:    BTRAP(0x43)
 tl0_irq4:      BTRAP(0x44)
 #endif
 tl0_irq5:      TRAP_IRQ(handler_irq, 5)
-tl0_irq6:      BTRAP(0x46) BTRAP(0x47) BTRAP(0x48) BTRAP(0x49)
+#ifdef CONFIG_SMP
+tl0_irq6:      TRAP_IRQ(smp_call_function_single_client, 6)
+#else
+tl0_irq6:      BTRAP(0x46)
+#endif
+tl0_irq7:      BTRAP(0x47) BTRAP(0x48) BTRAP(0x49)
 tl0_irq10:     BTRAP(0x4a) BTRAP(0x4b) BTRAP(0x4c) BTRAP(0x4d)
 tl0_irq14:     TRAP_IRQ(timer_interrupt, 14)
 tl0_irq15:     TRAP_IRQ(handler_irq, 15)

diff --git a/arch/sparc64/mm/ultra.S b/arch/sparc64/mm/ultra.S
index 9bb2d90..4c8ca13 100644 (file)
--- a/arch/sparc64/mm/ultra.S
+++ b/arch/sparc64/mm/ultra.S
@@ -688,6 +688,11 @@ xcall_call_function:
        wr              %g0, (1 << PIL_SMP_CALL_FUNC), %set_softint
        retry
 
+       .globl          xcall_call_function_single
+xcall_call_function_single:
+       wr              %g0, (1 << PIL_SMP_CALL_FUNC_SNGL), %set_softint
+       retry
+
        .globl          xcall_receive_signal
 xcall_receive_signal:
        wr              %g0, (1 << PIL_SMP_RECEIVE_SIGNAL), %set_softint

diff --git a/include/asm-sparc/pil.h b/include/asm-sparc/pil.h
index eaac842..71819bb 100644 (file)
--- a/include/asm-sparc/pil.h
+++ b/include/asm-sparc/pil.h
@@ -17,5 +17,6 @@
 #define PIL_SMP_CAPTURE                3
 #define PIL_SMP_CTX_NEW_VERSION        4
 #define PIL_DEVICE_IRQ         5
+#define PIL_SMP_CALL_FUNC_SNGL 6
 
 #endif /* !(_SPARC64_PIL_H) */

diff --git a/include/asm-sparc/smp_64.h b/include/asm-sparc/smp_64.h
index 4cfe09c..57224dd 100644 (file)
--- a/include/asm-sparc/smp_64.h
+++ b/include/asm-sparc/smp_64.h
@@ -34,6 +34,9 @@ DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
 extern cpumask_t cpu_core_map[NR_CPUS];
 extern int sparc64_multi_core;
 
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi(cpumask_t mask);
+
 /*
  *     General functions that each host system must provide.
  */