[POWERPC] spufs: Don't yield nosched context

Nosched context sould never be scheduled out, thus we must not
deactivate them in spu_yield ever.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 5 insertions, 3 deletions

diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index 68fcdc4515ab..3b831e07f1ed 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -430,9 +430,11 @@ void spu_deactivate(struct spu_context *ctx)
  */
 void spu_yield(struct spu_context *ctx)
 {
-        mutex_lock(&ctx->state_mutex);
-        __spu_deactivate(ctx, 0, MAX_PRIO);
-        mutex_unlock(&ctx->state_mutex);
+        if (!(ctx->flags & SPU_CREATE_NOSCHED)) {
+                mutex_lock(&ctx->state_mutex);
+                __spu_deactivate(ctx, 0, MAX_PRIO);
+                mutex_unlock(&ctx->state_mutex);
+        }
 }
 
 void spu_sched_tick(struct work_struct *work)