Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  powerpc: Fix rare boot build breakage
  powerpc/spufs: Fix possible scheduling of a context to multiple SPEs
  powerpc/spufs: Fix race for a free SPU
  powerpc/spufs: Fix multiple get_spu_context()

2 files changed, 24 insertions, 7 deletions

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 14174aa24074..717a3bc1352e 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -49,7 +49,7 @@ zlib       := inffast.c inflate.c inftrees.c
 zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h
 zliblinuxheader := zlib.h zconf.h zutil.h
 
-$(addprefix $(obj)/,$(zlib) gunzip_util.o main.o): \
+$(addprefix $(obj)/,$(zlib) cuboot-c2k.o gunzip_util.o main.o prpmc2800.o): \
 	$(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
 
 src-libfdt := fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index 1c1b627ee843..67595bc380dc 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -643,9 +643,10 @@ static struct spu *find_victim(struct spu_context *ctx)
 			    !(tmp->flags & SPU_CREATE_NOSCHED) &&
 			    (!victim || tmp->prio > victim->prio)) {
 				victim = spu->ctx;
-				get_spu_context(victim);
 			}
 		}
+		if (victim)
+			get_spu_context(victim);
 		mutex_unlock(&cbe_spu_info[node].list_mutex);
 
 		if (victim) {
@@ -727,17 +728,33 @@ static void spu_schedule(struct spu *spu, struct spu_context *ctx)
 	/* not a candidate for interruptible because it's called either
 	   from the scheduler thread or from spu_deactivate */
 	mutex_lock(&ctx->state_mutex);
-	__spu_schedule(spu, ctx);
+	if (ctx->state == SPU_STATE_SAVED)
+		__spu_schedule(spu, ctx);
 	spu_release(ctx);
 }
 
-static void spu_unschedule(struct spu *spu, struct spu_context *ctx)
+/**
+ * spu_unschedule - remove a context from a spu, and possibly release it.
+ * @spu:	The SPU to unschedule from
+ * @ctx:	The context currently scheduled on the SPU
+ * @free_spu	Whether to free the SPU for other contexts
+ *
+ * Unbinds the context @ctx from the SPU @spu. If @free_spu is non-zero, the
+ * SPU is made available for other contexts (ie, may be returned by
+ * spu_get_idle). If this is zero, the caller is expected to schedule another
+ * context to this spu.
+ *
+ * Should be called with ctx->state_mutex held.
+ */
+static void spu_unschedule(struct spu *spu, struct spu_context *ctx,
+		int free_spu)
 {
 	int node = spu->node;
 
 	mutex_lock(&cbe_spu_info[node].list_mutex);
 	cbe_spu_info[node].nr_active--;
-	spu->alloc_state = SPU_FREE;
+	if (free_spu)
+		spu->alloc_state = SPU_FREE;
 	spu_unbind_context(spu, ctx);
 	ctx->stats.invol_ctx_switch++;
 	spu->stats.invol_ctx_switch++;
@@ -837,7 +854,7 @@ static int __spu_deactivate(struct spu_context *ctx, int force, int max_prio)
 	if (spu) {
 		new = grab_runnable_context(max_prio, spu->node);
 		if (new || force) {
-			spu_unschedule(spu, ctx);
+			spu_unschedule(spu, ctx, new == NULL);
 			if (new) {
 				if (new->flags & SPU_CREATE_NOSCHED)
 					wake_up(&new->stop_wq);
@@ -910,7 +927,7 @@ static noinline void spusched_tick(struct spu_context *ctx)
 
 	new = grab_runnable_context(ctx->prio + 1, spu->node);
 	if (new) {
-		spu_unschedule(spu, ctx);
+		spu_unschedule(spu, ctx, 0);
 		if (test_bit(SPU_SCHED_SPU_RUN, &ctx->sched_flags))
 			spu_add_to_rq(ctx);
 	} else {