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| author | Joerg Roedel <jroedel@suse.de> | 2014-07-09 17:56:43 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2014-07-10 15:36:58 +0200 |
| commit | dba3838d7af38b15bcc8ff3437362d449408b547 (patch) | |
| tree | 6488d8ec212077c76113b24e1bf9f51d8f119dc4 /drivers/iommu | |
| parent | f0aac63b873b354c1a16bef03563cbc3941ce7ad (diff) | |
| download | linux-dba3838d7af38b15bcc8ff3437362d449408b547.tar.gz linux-dba3838d7af38b15bcc8ff3437362d449408b547.tar.bz2 linux-dba3838d7af38b15bcc8ff3437362d449408b547.zip | |
iommu/amd: Don't hold a reference to task_struct
Since we are only caring about the lifetime of the mm_struct
and not the task we can't safely keep a reference to it. The
reference is also not needed anymore, so remove that code
entirely.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Tested-by: Oded Gabbay <Oded.Gabbay@amd.com>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu_v2.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c index 2b848c01fde0..f7ca009bda67 100644 --- a/drivers/iommu/amd_iommu_v2.c +++ b/drivers/iommu/amd_iommu_v2.c @@ -47,7 +47,6 @@ struct pasid_state { atomic_t count; /* Reference count */ unsigned mmu_notifier_count; /* Counting nested mmu_notifier calls */ - struct task_struct *task; /* Task bound to this PASID */ struct mm_struct *mm; /* mm_struct for the faults */ struct mmu_notifier mn; /* mmu_notifier handle */ struct pri_queue pri[PRI_QUEUE_SIZE]; /* PRI tag states */ @@ -531,7 +530,7 @@ static void do_fault(struct work_struct *work) write = !!(fault->flags & PPR_FAULT_WRITE); down_read(&fault->state->mm->mmap_sem); - npages = get_user_pages(fault->state->task, fault->state->mm, + npages = get_user_pages(NULL, fault->state->mm, fault->address, 1, write, 0, &page, NULL); up_read(&fault->state->mm->mmap_sem); @@ -672,7 +671,6 @@ int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid, spin_lock_init(&pasid_state->lock); mm = get_task_mm(task); - pasid_state->task = task; pasid_state->mm = mm; pasid_state->device_state = dev_state; pasid_state->pasid = pasid; |