Subject: Enable SPU switch notification to detect currently active SPU tasks.
From: Maynard Johnson <[email protected]>
This patch adds to the capability of spu_switch_event_register to notify the
caller of currently active SPU tasks. It also exports spu_switch_event_register
and spu_switch_event_unregister.
Signed-off-by: Maynard Johnson <[email protected]>
Index: linux-2.6.19-rc6-arnd1+patches/arch/powerpc/platforms/cell/spufs/sched.c
===================================================================
--- linux-2.6.19-rc6-arnd1+patches.orig/arch/powerpc/platforms/cell/spufs/sched.c 2006-12-04 10:56:04.730698720 -0600
+++ linux-2.6.19-rc6-arnd1+patches/arch/powerpc/platforms/cell/spufs/sched.c 2006-12-08 09:04:40.558774376 -0600
@@ -84,15 +84,36 @@
ctx ? ctx->object_id : 0, spu);
}
+static void notify_spus_active(struct notifier_block * n)
+{
+ int node;
+ for (node = 0; node < MAX_NUMNODES; node++) {
+ struct spu *spu;
+ mutex_lock(&spu_prio->active_mutex[node]);
+ list_for_each_entry(spu, &spu_prio->active_list[node], list) {
+ struct spu_context *ctx = spu->ctx;
+ n->notifier_call(n, ctx ? ctx->object_id : 0, spu);
+ }
+ mutex_unlock(&spu_prio->active_mutex[node]);
+ }
+
+}
+
int spu_switch_event_register(struct notifier_block * n)
{
- return blocking_notifier_chain_register(&spu_switch_notifier, n);
+ int ret;
+ ret = blocking_notifier_chain_register(&spu_switch_notifier, n);
+ if (!ret)
+ notify_spus_active(n);
+ return ret;
}
+EXPORT_SYMBOL_GPL(spu_switch_event_register);
int spu_switch_event_unregister(struct notifier_block * n)
{
return blocking_notifier_chain_unregister(&spu_switch_notifier, n);
}
+EXPORT_SYMBOL_GPL(spu_switch_event_unregister);
static inline void bind_context(struct spu *spu, struct spu_context *ctx)
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