For https://paste.ubuntu.com/p/FvgjPns75v/ (modified riffa_driver.c) , why am I having the following error: invalid use of undefined type ‘struct sched_param’ ? I have included https://github.com/promach/riffa/blob/full_duplex/driver/linux/riffa_driver.c#L55-L59 (sched.h header) I am trying to make https://github.com/promach/riffa/blob/full_duplex/driver/linux/riffa_driver.c#L1011-L1027 (this un-modified riffa_driver.c) scheduled with round-robin policy Note: For the riffa_driver.c, please refer to the ubuntu paste. Mailing list receivers do not generally favour inline posting of long code. >phung@UbuntuHW15:~/Documents/fpga_overlay/riffa/driver/linux$ make clean && make debug > rm -Rf *.ko *.cmd *.o *.so *.so.* .*.cmd Module.symvers Module.markers modules.order *.mod.c .tmp_versions > Compiling driver for kernel: 4.17.4-041704-generic with the following values > NAME: 'riffa' > MAJNUM: '100' > VENDOR_ID0: '10EE' > VENDOR_ID1: '1172' > > sed -i 's/#define MAJOR_NUM [^\n]*/#define MAJOR_NUM 100/g' riffa_driver.h > sed -i 's/#define DEVICE_NAME [^\n]*/#define DEVICE_NAME "riffa"/g' riffa_driver.h > sed -i 's/#define VENDOR_ID0 [^\n]*/#define VENDOR_ID0 0x10EE/g' riffa_driver.h > sed -i 's/#define VENDOR_ID1 [^\n]*/#define VENDOR_ID1 0x1172/g' riffa_driver.h > sed -i 's/#define DEBUG [^\n]*/#define DBUG 1/g' riffa_driver.h > sed -i 's/#define DBUG [^\n]*/#define DEBUG 1/g' riffa_driver.h > make -C /lib/modules/`uname -r`/build SUBDIRS=`pwd` modules > make[1]: Entering directory '/usr/src/linux-headers-4.17.4-041704-generic' > CC [M] /home/phung/Documents/fpga_overlay/riffa/driver/linux/riffa_driver.o > /home/phung/Documents/fpga_overlay/riffa/driver/linux/riffa_driver.c: In function ‘chnl_recv’: > /home/phung/Documents/fpga_overlay/riffa/driver/linux/riffa_driver.c:601:12: error: invalid use of undefined type ‘struct sched_param’ > recv_param.sched_priority = 1; > ^ > /home/phung/Documents/fpga_overlay/riffa/driver/linux/riffa_driver.c: In function ‘chnl_send’: > /home/phung/Documents/fpga_overlay/riffa/driver/linux/riffa_driver.c:831:12: error: invalid use of undefined type ‘struct sched_param’ > send_param.sched_priority = 1; > ^ > /home/phung/Documents/fpga_overlay/riffa/driver/linux/riffa_driver.c: At top level: > /home/phung/Documents/fpga_overlay/riffa/driver/linux/riffa_driver.c:133:27: error: storage size of ‘recv_param’ isn’t known > static struct sched_param recv_param; > ^~~~~~~~~~ > /home/phung/Documents/fpga_overlay/riffa/driver/linux/riffa_driver.c:134:27: error: storage size of ‘send_param’ isn’t known > static struct sched_param send_param; > ^~~~~~~~~~ > scripts/Makefile.build:312: recipe for target '/home/phung/Documents/fpga_overlay/riffa/driver/linux/riffa_driver.o' failed > make[2]: *** [/home/phung/Documents/fpga_overlay/riffa/driver/linux/riffa_driver.o] Error 1 > Makefile:1577: recipe for target '_module_/home/phung/Documents/fpga_overlay/riffa/driver/linux' failed > make[1]: *** [_module_/home/phung/Documents/fpga_overlay/riffa/driver/linux] Error 2 > make[1]: Leaving directory '/usr/src/linux-headers-4.17.4-041704-generic' > Makefile:94: recipe for target 'riffa.ko' failed > make: *** [riffa.ko] Error 2 > > phung@UbuntuHW15:~/Documents/fpga_overlay/riffa/driver/linux$
