756 static void bpf_map_mmap_open(struct vm_area_struct *vma)  in bpf_map_mmap_open()  argument
758 	struct bpf_map *map = vma->vm_file->private_data;  in bpf_map_mmap_open()
760 	if (vma->vm_flags & VM_MAYWRITE)  in bpf_map_mmap_open()
765 static void bpf_map_mmap_close(struct vm_area_struct *vma)  in bpf_map_mmap_close()  argument
767 	struct bpf_map *map = vma->vm_file->private_data;  in bpf_map_mmap_close()
769 	if (vma->vm_flags & VM_MAYWRITE)  in bpf_map_mmap_close()
778 static int bpf_map_mmap(struct file *filp, struct vm_area_struct *vma)  in bpf_map_mmap()  argument
787 	if (!(vma->vm_flags & VM_SHARED))  in bpf_map_mmap()
792 	if (vma->vm_flags & VM_WRITE) {  in bpf_map_mmap()
809 	vma->vm_ops = &bpf_map_default_vmops;  in bpf_map_mmap()
810 	vma->vm_private_data = map;  in bpf_map_mmap()
811 	vm_flags_clear(vma, VM_MAYEXEC);  in bpf_map_mmap()
812 	if (!(vma->vm_flags & VM_WRITE))  in bpf_map_mmap()
814 		vm_flags_clear(vma, VM_MAYWRITE);  in bpf_map_mmap()
816 	err = map->ops->map_mmap(map, vma);  in bpf_map_mmap()
820 	if (vma->vm_flags & VM_MAYWRITE)  in bpf_map_mmap()