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Commit 5ed1c328 authored by KyongHo Cho's avatar KyongHo Cho Committed by Mauro Carvalho Chehab
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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: default avatarCho KyongHo <pullip.cho@samsung.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent cc4e8c3d

drivers/media/v4l2-core/videobuf2-memops.c

+2 −2
Original line number Original line Diff line number Diff line
@@ -37,7 +37,7 @@ struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma) 
{

{

	struct vm_area_struct *vma_copy;

	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)

	if (vma_copy == NULL)

		return NULL;

		return NULL;
@@ -75,7 +75,7 @@ void vb2_put_vma(struct vm_area_struct *vma) 
	if (vma->vm_file)

	if (vma->vm_file)

		fput(vma->vm_file);

		fput(vma->vm_file);





	kfree(vma);

	kmem_cache_free(vm_area_cachep, vma);

}

}

EXPORT_SYMBOL_GPL(vb2_put_vma);

EXPORT_SYMBOL_GPL(vb2_put_vma);