4 files changed, 7 insertions, 20 deletions

diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index e45cfa84911f..87eb07f94c5f 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -160,13 +160,6 @@ static int __spu_trap_data_seg(struct spu *spu, unsigned long ea)
 
         pr_debug("%s\n", __FUNCTION__);
 
-        if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
-                /* SLBs are pre-loaded for context switch, so
-                 * we should never get here!
-                 */
-                printk("%s: invalid access during switch!\n", __func__);
-                return 1;
-        }
         slb.esid = (ea & ESID_MASK) | SLB_ESID_V;
 
         switch(REGION_ID(ea)) {
@@ -226,11 +219,6 @@ static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr)
                 return 0;
         }
 
-        if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
-                printk("%s: invalid access during switch!\n", __func__);
-                return 1;
-        }
-
         spu->class_0_pending = 0;
         spu->dar = ea;
         spu->dsisr = dsisr;
diff --git a/arch/powerpc/platforms/cell/spufs/run.c b/arch/powerpc/platforms/cell/spufs/run.c
index fca22e18069a..6221968c2a3c 100644
--- a/arch/powerpc/platforms/cell/spufs/run.c
+++ b/arch/powerpc/platforms/cell/spufs/run.c
@@ -234,6 +234,7 @@ static int spu_run_fini(struct spu_context *ctx, u32 *npc,
         *npc = ctx->ops->npc_read(ctx);
 
         spuctx_switch_state(ctx, SPU_UTIL_IDLE_LOADED);
+        ctx->policy = SCHED_IDLE;
         spu_release(ctx);
 
         if (signal_pending(current))
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index 5915343e2599..3a5972117de7 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -856,21 +856,18 @@ static noinline void spusched_tick(struct spu_context *ctx)
 {
         struct spu_context *new = NULL;
         struct spu *spu = NULL;
-        u32 status;
 
         if (spu_acquire(ctx))
                 BUG();  /* a kernel thread never has signals pending */
 
         if (ctx->state != SPU_STATE_RUNNABLE)
                 goto out;
-        if (spu_stopped(ctx, &status))
-                goto out;
         if (ctx->flags & SPU_CREATE_NOSCHED)
                 goto out;
         if (ctx->policy == SCHED_FIFO)
                 goto out;
 
-        if (--ctx->time_slice)
+        if (--ctx->time_slice && ctx->policy != SCHED_IDLE)
                 goto out;
 
         spu = ctx->spu;
@@ -880,7 +877,8 @@ static noinline void spusched_tick(struct spu_context *ctx)
         new = grab_runnable_context(ctx->prio + 1, spu->node);
         if (new) {
                 spu_unschedule(spu, ctx);
-                spu_add_to_rq(ctx);
+                if (ctx->policy != SCHED_IDLE)
+                        spu_add_to_rq(ctx);
         } else {
                 spu_context_nospu_trace(spusched_tick__newslice, ctx);
                 ctx->time_slice++;
diff --git a/arch/powerpc/platforms/cell/spufs/switch.c b/arch/powerpc/platforms/cell/spufs/switch.c
index 6063c88c26d2..6f5886c7b1f9 100644
--- a/arch/powerpc/platforms/cell/spufs/switch.c
+++ b/arch/powerpc/platforms/cell/spufs/switch.c
@@ -720,8 +720,9 @@ static inline void set_switch_active(struct spu_state *csa, struct spu *spu)
          * Restore, Step 23.
          *     Change the software context switch pending flag
          *     to context switch active.
+         *
+         *     This implementation does not uses a switch active flag.
          */
-        set_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags);
         clear_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags);
         mb();
 }
@@ -1739,9 +1740,8 @@ static inline void reset_switch_active(struct spu_state *csa, struct spu *spu)
 {
         /* Restore, Step 74:
          *     Reset the "context switch active" flag.
+         *     Not performed by this implementation.
          */
-        clear_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags);
-        mb();
 }
 
 static inline void reenable_interrupts(struct spu_state *csa, struct spu *spu)