Error while building

[goyalanurag]

Hi! I am trying to build the module on Ubuntu 20.04 having kernel version 5.4.0 . After running the make command I get the following errors:

make -C /lib/modules/5.4.0-26-generic/build M=/home/ubuntu/Desktop/tcptuner/module modules
make[1]: Entering directory '/usr/src/linux-headers-5.4.0-26-generic'
  CC [M]  /home/ubuntu/Desktop/tcptuner/module/tcp_tuner.o
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c: In function ‘bictcp_update’:
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c:223:7: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
  223 |       (s32)(tcp_time_stamp - ca->last_time) <= HZ / 32) {
      |       ^
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c:231:41: warning: comparison between pointer and integer
  231 |   if (ca->epoch_start && tcp_time_stamp == ca->last_time) {
      |                                         ^~
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c:236:17: warning: assignment to ‘u32’ {aka ‘unsigned int’} from ‘u32 (*)(const struct tcp_sock *)’ {aka ‘unsigned int (*)(const struct tcp_sock *)’} makes integer from pointer without a cast [-Wint-conversion]
  236 |   ca->last_time = tcp_time_stamp;
      |                 ^
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c:239:21: warning: assignment to ‘u32’ {aka ‘unsigned int’} from ‘u32 (*)(const struct tcp_sock *)’ {aka ‘unsigned int (*)(const struct tcp_sock *)’} makes integer from pointer without a cast [-Wint-conversion]
  239 |     ca->epoch_start = tcp_time_stamp;                    /* record beginning */
      |                     ^
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c:271:7: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
  271 |   t = (s32)(tcp_time_stamp - ca->epoch_start);
      |       ^
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c: In function ‘hystart_update’:
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c:408:9: error: implicit declaration of function ‘NET_INC_STATS_BH’; did you mean ‘NET_INC_STATS’? [-Werror=implicit-function-declaration]
  408 |         NET_INC_STATS_BH(sock_net(sk),
      |         ^~~~~~~~~~~~~~~~
      |         NET_INC_STATS
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c:410:9: error: implicit declaration of function ‘NET_ADD_STATS_BH’; did you mean ‘NET_ADD_STATS’? [-Werror=implicit-function-declaration]
  410 |         NET_ADD_STATS_BH(sock_net(sk),
      |         ^~~~~~~~~~~~~~~~
      |         NET_ADD_STATS
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c: In function ‘bictcp_acked’:
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c:454:26: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
  454 |   if (ca->epoch_start && (s32)(tcp_time_stamp - ca->epoch_start) < HZ) {
      |                          ^
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c: At top level:
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c:481:21: error: initialization of ‘void (*)(struct sock *, const struct ack_sample *)’ from incompatible pointer type ‘void (*)(struct sock *, u32,  s32)’ {aka ‘void (*)(struct sock *, unsigned int,  int)’} [-Werror=incompatible-pointer-types]
  481 |   .pkts_acked     = bictcp_acked,
      |                     ^~~~~~~~~~~~
/home/ubuntu/Desktop/tcptuner/module/tcp_tuner.c:481:21: note: (near initialization for ‘cubictcp.pkts_acked’)
cc1: some warnings being treated as errors
make[2]: *** [scripts/Makefile.build:275: /home/ubuntu/Desktop/tcptuner/module/tcp_tuner.o] Error 1
make[1]: *** [Makefile:1719: /home/ubuntu/Desktop/tcptuner/module] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-5.4.0-26-generic'
make: *** [Makefile:4: all] Error 2

Kindly help me with this.