Merge branch 'merge'

[karo-tx-linux.git] / arch / powerpc / platforms / pseries / setup.c

diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 927e0a423b87ae3f86c313430f73ef98ed468b7a..de214d86ff4406dcc1e07d491a2f5af322b88df2 100644 (file)
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -501,7 +501,8 @@ static void pseries_dedicated_idle_sleep(void)
        }
 
        /*
-        * Cede if the other thread is not idle, so that it can
+        * If not SMT, cede processor.  If CPU is running SMT
+        * cede if the other thread is not idle, so that it can
         * go single-threaded.  If the other thread is idle,
         * we ask the hypervisor if it has pending work it
         * wants to do and cede if it does.  Otherwise we keep
@@ -514,7 +515,8 @@ static void pseries_dedicated_idle_sleep(void)
         * very low priority.  The cede enables interrupts, which
         * doesn't matter here.
         */
-       if (!lppaca[cpu ^ 1].idle || poll_pending() == H_PENDING)
+       if (!cpu_has_feature(CPU_FTR_SMT) || !lppaca[cpu ^ 1].idle
+           || poll_pending() == H_PENDING)
                cede_processor();
 
 out: