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[POWERPC] spu sched: simplity spu_remove_from_active_list 

If we call spu_remove_from_active_list that spu is always guaranteed
to be on the active list and in runnable state, so we can simply
do a list_del to remove it and unconditionally take the was_active
codepath.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
This commit is contained in:
Christoph Hellwig 2007-02-13 21:54:25 +01:00 committed by Arnd Bergmann
parent 26bec67386
commit 678b2ff1e6
1 changed files with 15 additions and 29 deletions
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44
arch/powerpc/platforms/cell/spufs/sched.c
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@ -83,27 +83,14 @@ static void spu_add_to_active_list(struct spu *spu)
/**
* spu_remove_from_active_list - remove spu from active list
* @spu: spu to remove from the active list
*
* This function removes an spu from the active list. If the spu was
* found on the active list the function returns 1, else it doesn't do
* anything and returns 0.
*/
static int spu_remove_from_active_list(struct spu *spu)
static void spu_remove_from_active_list(struct spu *spu)
{
int node = spu->node;
struct spu *tmp;
int rc = 0;
mutex_lock(&spu_prio->active_mutex[node]);
list_for_each_entry(tmp, &spu_prio->active_list[node], list) {
if (tmp == spu) {
list_del_init(&spu->list);
rc = 1;
break;
}
}
list_del_init(&spu->list);
mutex_unlock(&spu_prio->active_mutex[node]);
return rc;
}
static inline void mm_needs_global_tlbie(struct mm_struct *mm)
@ -167,16 +154,13 @@ static void spu_bind_context(struct spu *spu, struct spu_context *ctx)
* spu_unbind_context - unbind spu context from physical spu
* @spu: physical spu to unbind from
* @ctx: context to unbind
*
* If the spu was on the active list the function returns 1, else 0.
*/
static int spu_unbind_context(struct spu *spu, struct spu_context *ctx)
static void spu_unbind_context(struct spu *spu, struct spu_context *ctx)
{
int was_active = spu_remove_from_active_list(spu);
pr_debug("%s: unbind pid=%d SPU=%d NODE=%d\n", __FUNCTION__,
spu->pid, spu->number, spu->node);
spu_remove_from_active_list(spu);
spu_switch_notify(spu, NULL);
spu_unmap_mappings(ctx);
spu_save(&ctx->csa, spu);
@ -193,8 +177,6 @@ static int spu_unbind_context(struct spu *spu, struct spu_context *ctx)
ctx->spu = NULL;
spu->flags = 0;
spu->ctx = NULL;
return was_active;
}
/**
@ -340,17 +322,21 @@ int spu_activate(struct spu_context *ctx, unsigned long flags)
return -ERESTARTSYS;
}
/**
* spu_deactivate - unbind a context from it's physical spu
* @ctx: spu context to unbind
*
* Unbind @ctx from the physical spu it is running on and schedule
* the highest priority context to run on the freed physical spu.
*/
void spu_deactivate(struct spu_context *ctx)
{
struct spu *spu;
int was_active;
struct spu *spu = ctx->spu;
spu = ctx->spu;
if (!spu)
return;
was_active = spu_unbind_context(spu, ctx);
if (was_active)
if (spu) {
spu_unbind_context(spu, ctx);
spu_reschedule(spu);
}
}
void spu_yield(struct spu_context *ctx)