Hi, my xt_qtaguid module need convert to "struct proc_ops", https://github.com/youling257/android-4.9/commit/a6e3cddcceb96eb3edeb0da0951399b75d4f8731 https://github.com/youling257/android-4.9/commit/9eb92f5bcdcbc5b54d7dfe4b3050c8b9b8a17999 static const struct proc_ops qtudev_proc_ops = { .proc_open = qtudev_open, .proc_release = qtudev_release, }; static struct miscdevice qtu_device = { .minor = MISC_DYNAMIC_MINOR, .name = QTU_DEV_NAME, .fops = &qtudev_proc_ops, /* How sad it doesn't allow for defaults: .mode = S_IRUGO | S_IWUSR */ }; I have problem about ".fops = &qtudev_fops,", convert to ".fops = &qtudev_proc_ops," is right? build error, can you help me? CALL /root/1/scripts/atomic/check-atomics.sh CALL /root/1/scripts/checksyscalls.sh CHK include/generated/compile.h CC net/netfilter/xt_qtaguid.o /root/1/net/netfilter/xt_qtaguid.c:2895:10: error: initialization of ‘const struct file_operations *’ from incompatible pointer type ‘const struct proc_ops *’ [-Werror=incompatible-pointer-types] 2895 | .fops = &qtudev_proc_ops, | ^ /root/1/net/netfilter/xt_qtaguid.c:2895:10: note: (near initialization for ‘qtu_device.fops’) cc1: some warnings being treated as errors