Cell SPU code is going to use ->exec_path to get dcookies and stuff
so it needs task_struct saved, not mm_struct.
Export __put_task_struct() to allow link.
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
---
arch/powerpc/platforms/cell/spufs/context.c | 9 +++++----
arch/powerpc/platforms/cell/spufs/file.c | 2 +-
arch/powerpc/platforms/cell/spufs/sched.c | 2 +-
arch/powerpc/platforms/cell/spufs/spufs.h | 2 +-
kernel/fork.c | 1 +
5 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/platforms/cell/spufs/context.c b/arch/powerpc/platforms/cell/spufs/context.c
index db5398c..7ad45e1 100644
--- a/arch/powerpc/platforms/cell/spufs/context.c
+++ b/arch/powerpc/platforms/cell/spufs/context.c
@@ -57,7 +57,8 @@ struct spu_context *alloc_spu_context(struct spu_gang *gang)
init_waitqueue_head(&ctx->run_wq);
ctx->state = SPU_STATE_SAVED;
ctx->ops = &spu_backing_ops;
- ctx->owner = get_task_mm(current);
+ get_task_struct(current);
+ ctx->owner = current;
INIT_LIST_HEAD(&ctx->rq);
INIT_LIST_HEAD(&ctx->aff_list);
if (gang)
@@ -111,7 +112,7 @@ int put_spu_context(struct spu_context *ctx)
/* give up the mm reference when the context is about to be destroyed */
void spu_forget(struct spu_context *ctx)
{
- struct mm_struct *mm;
+ struct task_struct *tsk;
/*
* This is basically an open-coded spu_acquire_saved, except that
@@ -122,9 +123,9 @@ void spu_forget(struct spu_context *ctx)
if (ctx->state != SPU_STATE_SAVED)
spu_deactivate(ctx);
- mm = ctx->owner;
+ tsk = ctx->owner;
ctx->owner = NULL;
- mmput(mm);
+ put_task_struct(tsk);
spu_release(ctx);
}
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index d6a519e..d781304 100644
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -1545,7 +1545,7 @@ static int spufs_mfc_open(struct inode *inode, struct file *file)
struct spu_context *ctx = i->i_ctx;
/* we don't want to deal with DMA into other processes */
- if (ctx->owner != current->mm)
+ if (ctx->owner != current)
return -EINVAL;
if (atomic_read(&inode->i_count) != 1)
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index f085369..9fbd87a 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -230,7 +230,7 @@ static void spu_bind_context(struct spu *spu, struct spu_context *ctx)
ctx->stats.slb_flt_base = spu->stats.slb_flt;
ctx->stats.class2_intr_base = spu->stats.class2_intr;
- spu_associate_mm(spu, ctx->owner);
+ spu_associate_mm(spu, ctx->owner->mm);
spin_lock_irq(&spu->register_lock);
spu->ctx = ctx;
diff --git a/arch/powerpc/platforms/cell/spufs/spufs.h b/arch/powerpc/platforms/cell/spufs/spufs.h
index ae31573..70a7813 100644
--- a/arch/powerpc/platforms/cell/spufs/spufs.h
+++ b/arch/powerpc/platforms/cell/spufs/spufs.h
@@ -95,7 +95,7 @@ struct spu_context {
struct mutex state_mutex;
struct mutex run_mutex;
- struct mm_struct *owner;
+ struct task_struct *owner;
struct kref kref;
wait_queue_head_t ibox_wq;
diff --git a/kernel/fork.c b/kernel/fork.c
index c0ee931..b396c07 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -160,6 +160,7 @@ void __put_task_struct(struct task_struct *tsk)
if (!profile_handoff_task(tsk))
free_task(tsk);
}
+EXPORT_SYMBOL(__put_task_struct);
/*
* macro override instead of weak attribute alias, to workaround
--
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