[SPARC64]: Add sun4v_cpu_yield().

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

diff --git a/arch/sparc64/kernel/entry.S b/arch/sparc64/kernel/entry.S
index bd332e4..9f3048e 100644 (file)
--- a/arch/sparc64/kernel/entry.S
+++ b/arch/sparc64/kernel/entry.S
@@ -1786,3 +1786,12 @@ sun4v_cpu_qconf:
        ta      HV_FAST_TRAP
        retl
         nop
+
+       /* returns %o0: status
+        */
+       .globl  sun4v_cpu_yield
+sun4v_cpu_yield:
+       mov     HV_FAST_CPU_YIELD, %o5
+       ta      HV_FAST_TRAP
+       retl
+        nop

diff --git a/include/asm-sparc64/hypervisor.h b/include/asm-sparc64/hypervisor.h
index cd5fbcd..726e2ea 100644 (file)
--- a/include/asm-sparc64/hypervisor.h
+++ b/include/asm-sparc64/hypervisor.h
@@ -258,6 +258,9 @@
  */
 #define HV_FAST_CPU_YIELD              0x12
 
+#ifndef __ASSEMBLY__
+extern unsigned long sun4v_cpu_yield(void);
+#endif
 
 /* cpu_qconf()
  * TRAP:       HV_FAST_TRAP