Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/dtor/input.git manually

[powerpc.git] / arch / x86_64 / kernel / smp.c

diff --git a/arch/x86_64/kernel/smp.c b/arch/x86_64/kernel/smp.c
index e3cdbf9..ccae392 100644 (file)
--- a/arch/x86_64/kernel/smp.c
+++ b/arch/x86_64/kernel/smp.c
@@ -27,6 +27,7 @@
 #include <asm/mach_apic.h>
 #include <asm/mmu_context.h>
 #include <asm/proto.h>
+#include <asm/apicdef.h>
 
 /*
  *     Smarter SMP flushing macros. 
@@ -282,6 +283,16 @@ struct call_data_struct {
 
 static struct call_data_struct * call_data;
 
+void lock_ipi_call_lock(void)
+{
+       spin_lock_irq(&call_lock);
+}
+
+void unlock_ipi_call_lock(void)
+{
+       spin_unlock_irq(&call_lock);
+}
+
 /*
  * this function sends a 'generic call function' IPI to all other CPUs
  * in the system.
@@ -413,3 +424,27 @@ asmlinkage void smp_call_function_interrupt(void)
                atomic_inc(&call_data->finished);
        }
 }
+
+int safe_smp_processor_id(void)
+{
+       int apicid, i;
+
+       if (disable_apic)
+               return 0;
+
+       apicid = hard_smp_processor_id();
+       if (x86_cpu_to_apicid[apicid] == apicid)
+               return apicid;
+
+       for (i = 0; i < NR_CPUS; ++i) {
+               if (x86_cpu_to_apicid[i] == apicid)
+                       return i;
+       }
+
+       /* No entries in x86_cpu_to_apicid?  Either no MPS|ACPI,
+        * or called too early.  Either way, we must be CPU 0. */
+       if (x86_cpu_to_apicid[0] == BAD_APICID)
+               return 0;
+
+       return 0; /* Should not happen */
+}