[POWERPC] spufs: don't (ab)use SCHED_IDLE

commit 4ef11014 introduced a usage of SCHED_IDLE to detect when
a context is within spu_run.

Instead of SCHED_IDLE (which has other meaning), add a flag to
sched_flags to tell if a context should be running.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

3 files changed, 5 insertions, 3 deletions

diff --git a/arch/powerpc/platforms/cell/spufs/run.c b/arch/powerpc/platforms/cell/spufs/run.c
index 6221968c2a3c..cac69e116776 100644
--- a/arch/powerpc/platforms/cell/spufs/run.c
+++ b/arch/powerpc/platforms/cell/spufs/run.c
@@ -220,6 +220,7 @@ static int spu_run_init(struct spu_context *ctx, u32 *npc)
                 }
         }
 
+        set_bit(SPU_SCHED_SPU_RUN, &ctx->sched_flags);
         return 0;
 }
 
@@ -234,7 +235,7 @@ 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;
+        clear_bit(SPU_SCHED_SPU_RUN, &ctx->sched_flags);
         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 5d5f680cd0b8..00528ef84ad2 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -867,7 +867,7 @@ static noinline void spusched_tick(struct spu_context *ctx)
         if (ctx->policy == SCHED_FIFO)
                 goto out;
 
-        if (--ctx->time_slice && ctx->policy != SCHED_IDLE)
+        if (--ctx->time_slice && test_bit(SPU_SCHED_SPU_RUN, &ctx->sched_flags))
                 goto out;
 
         spu = ctx->spu;
@@ -877,7 +877,7 @@ static noinline void spusched_tick(struct spu_context *ctx)
         new = grab_runnable_context(ctx->prio + 1, spu->node);
         if (new) {
                 spu_unschedule(spu, ctx);
-                if (ctx->policy != SCHED_IDLE)
+                if (test_bit(SPU_SCHED_SPU_RUN, &ctx->sched_flags))
                         spu_add_to_rq(ctx);
         } else {
                 spu_context_nospu_trace(spusched_tick__newslice, ctx);
diff --git a/arch/powerpc/platforms/cell/spufs/spufs.h b/arch/powerpc/platforms/cell/spufs/spufs.h
index 2c2fe3c07d72..cdc515182f82 100644
--- a/arch/powerpc/platforms/cell/spufs/spufs.h
+++ b/arch/powerpc/platforms/cell/spufs/spufs.h
@@ -44,6 +44,7 @@ struct spu_gang;
 enum {
         SPU_SCHED_NOTIFY_ACTIVE,
         SPU_SCHED_WAS_ACTIVE,   /* was active upon spu_acquire_saved()  */
+        SPU_SCHED_SPU_RUN,      /* context is within spu_run */
 };
 
 struct spu_context {