The slab for vm_area_struct which is vm_area_cachep is already prepared
for the general use. Instead of kmalloc() for the vma copy for userptr,
allocation from vm_area_cachep is more beneficial.
CC: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
CC: Hans Verkuil <hans.verkuil@xxxxxxxxx>
CC: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Cho KyongHo <pullip.cho@xxxxxxxxxxx>
---
drivers/media/v4l2-core/videobuf2-memops.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/media/v4l2-core/videobuf2-memops.c b/drivers/media/v4l2-core/videobuf2-memops.c
index 81c1ad8..dd06efa 100644
--- a/drivers/media/v4l2-core/videobuf2-memops.c
+++ b/drivers/media/v4l2-core/videobuf2-memops.c
@@ -37,7 +37,7 @@ struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma)
{
struct vm_area_struct *vma_copy;
- vma_copy = kmalloc(sizeof(*vma_copy), GFP_KERNEL);
+ vma_copy = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
if (vma_copy == NULL)
return NULL;
@@ -75,7 +75,7 @@ void vb2_put_vma(struct vm_area_struct *vma)
if (vma->vm_file)
fput(vma->vm_file);
- kfree(vma);
+ kmem_cache_free(vm_area_cachep, vma);
}
EXPORT_SYMBOL_GPL(vb2_put_vma);
--
1.7.9.5
--
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