1 Aug
2019
1 Aug
'19
6:52 a.m.
static int mmap_udmabuf(struct dma_buf *buf, struct vm_area_struct *vma) { struct udmabuf *ubuf = buf->priv;
pgprot_t pgprot = vm_get_page_prot(vma->vm_flags);
if ((vma->vm_flags & (VM_SHARED | VM_MAYSHARE)) == 0) return -EINVAL;
if (ubuf->flags & UDMABUF_FLAGS_PROT_NONE)
return -EINVAL;if ((ubuf->flags & UDMABUF_FLAGS_PROT_READ) == 0)
"if ((vma->vm_flags & VM_READ) == 0)" ?
cheers, Gerd