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[POWERPC] avoid SPU_ACTIVATE_NOWAKE optimization

Browse source 
This optimization was added recently but is still buggy,
so back it out for now.

Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
This commit is contained in:
Christoph Hellwig 2007-03-10 00:05:36 +01:00 committed by Arnd Bergmann
parent aa0ed2bdb6
commit 50b520d4ef
3 changed files with 6 additions and 11 deletions
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4
arch/powerpc/platforms/cell/spufs/run.c
View file

@ -143,7 +143,7 @@ static inline int spu_run_init(struct spu_context *ctx, u32 * npc)
int ret;
unsigned long runcntl = SPU_RUNCNTL_RUNNABLE;
ret = spu_acquire_runnable(ctx, SPU_ACTIVATE_NOWAKE);
ret = spu_acquire_runnable(ctx, 0);
if (ret)
return ret;
@ -155,7 +155,7 @@ static inline int spu_run_init(struct spu_context *ctx, u32 * npc)
spu_release(ctx);
ret = spu_setup_isolated(ctx);
if (!ret)
ret = spu_acquire_runnable(ctx, SPU_ACTIVATE_NOWAKE);
ret = spu_acquire_runnable(ctx, 0);
}
/* if userspace has set the runcntrl register (eg, to issue an

7
arch/powerpc/platforms/cell/spufs/sched.c
View file

@ -263,7 +263,6 @@ static void spu_prio_wait(struct spu_context *ctx)
{
DEFINE_WAIT(wait);
set_bit(SPU_SCHED_WAKE, &ctx->sched_flags);
prepare_to_wait_exclusive(&ctx->stop_wq, &wait, TASK_INTERRUPTIBLE);
if (!signal_pending(current)) {
mutex_unlock(&ctx->state_mutex);
@ -272,7 +271,6 @@ static void spu_prio_wait(struct spu_context *ctx)
}
__set_current_state(TASK_RUNNING);
remove_wait_queue(&ctx->stop_wq, &wait);
clear_bit(SPU_SCHED_WAKE, &ctx->sched_flags);
}
/**
@ -292,7 +290,7 @@ static void spu_reschedule(struct spu *spu)
best = sched_find_first_bit(spu_prio->bitmap);
if (best < MAX_PRIO) {
struct spu_context *ctx = spu_grab_context(best);
if (ctx && test_bit(SPU_SCHED_WAKE, &ctx->sched_flags))
if (ctx)
wake_up(&ctx->stop_wq);
}
spin_unlock(&spu_prio->runq_lock);
@ -414,8 +412,7 @@ int spu_activate(struct spu_context *ctx, unsigned long flags)
}
spu_add_to_rq(ctx);
if (!(flags & SPU_ACTIVATE_NOWAKE))
spu_prio_wait(ctx);
spu_prio_wait(ctx);
spu_del_from_rq(ctx);
} while (!signal_pending(current));

6
arch/powerpc/platforms/cell/spufs/spufs.h
View file

@ -41,7 +41,7 @@ struct spu_gang;
/* ctx->sched_flags */
enum {
SPU_SCHED_WAKE = 0,
SPU_SCHED_WAKE = 0, /* currently unused */
};
struct spu_context {
@ -191,9 +191,7 @@ void spu_forget(struct spu_context *ctx);
int spu_acquire_runnable(struct spu_context *ctx, unsigned long flags);
void spu_acquire_saved(struct spu_context *ctx);
int spu_acquire_exclusive(struct spu_context *ctx);
enum {
SPU_ACTIVATE_NOWAKE = 1,
};
int spu_activate(struct spu_context *ctx, unsigned long flags);
void spu_deactivate(struct spu_context *ctx);
void spu_yield(struct spu_context *ctx);