Source of privcmd-buf.c - linux-imx - PHYTEC BitBucket (Stash)

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{
    struct privcmd_buf_private *file_priv = file->private_data;
    struct privcmd_buf_vma_private *vma_priv;
    unsigned long count = vma_pages(vma);
    unsigned int i;
    int ret = 0;
​
    if (!(vma->vm_flags & VM_SHARED))
        return -EINVAL;
​
    vma_priv = kzalloc(sizeof(*vma_priv) + count * sizeof(void *),
               GFP_KERNEL);
    vma_priv = kzalloc(struct_size(vma_priv, pages, count), GFP_KERNEL);
    if (!vma_priv)
        return -ENOMEM;
​
    for (i = 0; i < count; i++) {
        vma_priv->pages[i] = alloc_page(GFP_KERNEL | __GFP_ZERO);
        if (!vma_priv->pages[i])
            break;
        vma_priv->n_pages++;
    }
​