Merge ../powerpc-merge

[sfrench/cifs-2.6.git] / arch / powerpc / kernel / process.c

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 1201880cab40b15d39b09418748a08e94764baac..dd774c3c9302450635d41b84e5298270b75fd77b 100644 (file)
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -886,3 +886,35 @@ void dump_stack(void)
        show_stack(current, NULL);
 }
 EXPORT_SYMBOL(dump_stack);
+
+#ifdef CONFIG_PPC64
+void ppc64_runlatch_on(void)
+{
+       unsigned long ctrl;
+
+       if (cpu_has_feature(CPU_FTR_CTRL) && !test_thread_flag(TIF_RUNLATCH)) {
+               HMT_medium();
+
+               ctrl = mfspr(SPRN_CTRLF);
+               ctrl |= CTRL_RUNLATCH;
+               mtspr(SPRN_CTRLT, ctrl);
+
+               set_thread_flag(TIF_RUNLATCH);
+       }
+}
+
+void ppc64_runlatch_off(void)
+{
+       unsigned long ctrl;
+
+       if (cpu_has_feature(CPU_FTR_CTRL) && test_thread_flag(TIF_RUNLATCH)) {
+               HMT_medium();
+
+               clear_thread_flag(TIF_RUNLATCH);
+
+               ctrl = mfspr(SPRN_CTRLF);
+               ctrl &= ~CTRL_RUNLATCH;
+               mtspr(SPRN_CTRLT, ctrl);
+       }
+}
+#endif