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[media] v4l: vb2-memops: use vma slab when vma allocation 

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: Hans Verkuil <hans.verkuil@cisco.com>
CC: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Cho KyongHo <pullip.cho@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
KyongHo Cho 2015-02-05 02:52:42 -03:00 committed by Mauro Carvalho Chehab
parent cc4e8c3dc9
commit 5ed1c328ea
1 changed files with 2 additions and 2 deletions
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4
drivers/media/v4l2-core/videobuf2-memops.c
View File

@ -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);