I've reinstall modules but it still doesn't work. Researching the above error, dmesg shows:
I've noticed that make command get some warnings in file clock.c which contains mISDN_clock_get.
/home/rivas/GSM/mISDN/standalone/drivers/isdn/mISDN/clock.c:116:1: warning: data definition has no type or storage class [enabled by default]
/home/rivas/GSM/mISDN/standalone/drivers/isdn/mISDN/clock.c:116:1: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL’ [-Wimplicit-int]
/home/rivas/GSM/mISDN/standalone/drivers/isdn/mISDN/clock.c:116:1: warning: parameter names (without types) in function declaration [enabled by default]
/home/rivas/GSM/mISDN/standalone/drivers/isdn/mISDN/clock.c:138:1: warning: data definition has no type or storage class [enabled by default]
/home/rivas/GSM/mISDN/standalone/drivers/isdn/mISDN/clock.c:138:1: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL’ [-Wimplicit-int]
/home/rivas/GSM/mISDN/standalone/drivers/isdn/mISDN/clock.c:138:1: warning: parameter names (without types) in function declaration [enabled by default]
/home/rivas/GSM/mISDN/standalone/drivers/isdn/mISDN/clock.c:191:1: warning: data definition has no type or storage class [enabled by default]
/home/rivas/GSM/mISDN/standalone/drivers/isdn/mISDN/clock.c:191:1: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL’ [-Wimplicit-int]
/home/rivas/GSM/mISDN/standalone/drivers/isdn/mISDN/clock.c:191:1: warning: parameter names (without types) in function declaration [enabled by default]
/home/rivas/GSM/mISDN/standalone/drivers/isdn/mISDN/clock.c:216:1: warning: data definition has no type or storage class [enabled by default]
/home/rivas/GSM/mISDN/standalone/drivers/isdn/mISDN/clock.c:216:1: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL’ [-Wimplicit-int]
/home/rivas/GSM/mISDN/standalone/drivers/isdn/mISDN/clock.c:216:1: warning: parameter names (without types) in function declaration [enabled by default]