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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>
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@ -37,7 +37,7 @@ struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma)
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{
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struct vm_area_struct *vma_copy;
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vma_copy = kmalloc(sizeof(*vma_copy), GFP_KERNEL);
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vma_copy = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
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if (vma_copy == NULL)
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return NULL;
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@ -75,7 +75,7 @@ void vb2_put_vma(struct vm_area_struct *vma)
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if (vma->vm_file)
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fput(vma->vm_file);
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kfree(vma);
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kmem_cache_free(vm_area_cachep, vma);
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}
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EXPORT_SYMBOL_GPL(vb2_put_vma);
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