diff mbox series

[v6,3/7] iommu/sva: Remove PASID to mm lookup function

Message ID 20230313204158.1495067-4-jacob.jun.pan@linux.intel.com (mailing list archive)
State Handled Elsewhere
Headers show
Series [v6,1/7] iommu/vt-d: Remove virtual command interface | expand

Commit Message

Jacob Pan March 13, 2023, 8:41 p.m. UTC 
There is no user of iommu_sva_find() function, remove it so that PASID
allocator can be a simple IDA. Device drivers are expected to store
and keep track of their own PASID metadata.

Signed-off-by: Jason Gunthorpe<jgg@nvidia.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
 drivers/iommu/iommu-sva.c | 20 --------------------
 drivers/iommu/iommu-sva.h |  1 -
 2 files changed, 21 deletions(-)

Comments

Baolu Lu March 14, 2023, 2:08 a.m. UTC | #1 
On 3/14/23 4:41 AM, Jacob Pan wrote:
> There is no user of iommu_sva_find() function, remove it so that PASID
> allocator can be a simple IDA. Device drivers are expected to store
> and keep track of their own PASID metadata.
> 
> Signed-off-by: Jason Gunthorpe<jgg@nvidia.com>
> Signed-off-by: Jacob Pan<jacob.jun.pan@linux.intel.com>

Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>

Best regards,
baolu
diff mbox series

Patch

diff --git a/drivers/iommu/iommu-sva.c b/drivers/iommu/iommu-sva.c
index fcfdc80a3939..4f357ef14f04 100644
--- a/drivers/iommu/iommu-sva.c
+++ b/drivers/iommu/iommu-sva.c
@@ -51,26 +51,6 @@  int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t min, ioasid_t max)
 }
 EXPORT_SYMBOL_GPL(iommu_sva_alloc_pasid);
 
-/* ioasid_find getter() requires a void * argument */
-static bool __mmget_not_zero(void *mm)
-{
-	return mmget_not_zero(mm);
-}
-
-/**
- * iommu_sva_find() - Find mm associated to the given PASID
- * @pasid: Process Address Space ID assigned to the mm
- *
- * On success a reference to the mm is taken, and must be released with mmput().
- *
- * Returns the mm corresponding to this PASID, or an error if not found.
- */
-struct mm_struct *iommu_sva_find(ioasid_t pasid)
-{
-	return ioasid_find(&iommu_sva_pasid, pasid, __mmget_not_zero);
-}
-EXPORT_SYMBOL_GPL(iommu_sva_find);
-
 /**
  * iommu_sva_bind_device() - Bind a process address space to a device
  * @dev: the device
diff --git a/drivers/iommu/iommu-sva.h b/drivers/iommu/iommu-sva.h
index 7215a761b962..102eae1817a2 100644
--- a/drivers/iommu/iommu-sva.h
+++ b/drivers/iommu/iommu-sva.h
@@ -9,7 +9,6 @@ 
 #include <linux/mm_types.h>
 
 int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t min, ioasid_t max);
-struct mm_struct *iommu_sva_find(ioasid_t pasid);
 
 /* I/O Page fault */
 struct device;