lowlander
Problems compiling source
make -C /lib/modules/5.15.0-46-generic/build M=/home/dmx/dmx_usb_module
make[1]: Entering directory '/usr/src/linux-headers-5.15.0-46-generic'
CC [M] /home/dmx/dmx_usb_module/dmx_usb.o
In file included from ./include/linux/kernel.h:19,
from /home/dmx/dmx_usb_module/dmx_usb.c:16:
/home/dmx/dmx_usb_module/dmx_usb.c: In function ‘dmx_usb_write’:
./include/linux/kern_levels.h:5:18: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘size_t’ {aka ‘long unsigned int’} [-Wformat=]
5 | #define KERN_SOH "\001" /* ASCII Start Of Header /
| ^~~~~~
./include/linux/printk.h:422:11: note: in definition of macro ‘printk_index_wrap’
422 | _p_func(_fmt, ##VA_ARGS);
| ^~~~
/home/dmx/dmx_usb_module/dmx_usb.c:41:45: note: in expansion of macro ‘printk’
41 | #define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG FILE ": " format "\n" , ## arg); } while (0)
| ^~~~~~
./include/linux/kern_levels.h:15:20: note: in expansion of macro ‘KERN_SOH’
15 | #define KERN_DEBUG KERN_SOH "7" / debug-level messages */
| ^~~~~~~~
/home/dmx/dmx_usb_module/dmx_usb.c:41:52: note: in expansion of macro ‘KERN_DEBUG’
41 | #define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG FILE ": " format "\n" , ## arg); } while (0)
| ^~~~~~~~~~
/home/dmx/dmx_usb_module/dmx_usb.c:409:2: note: in expansion of macro ‘dbg’
409 | dbg("%s - minor %d, count = %d", FUNCTION, dev->minor, count);
| ^~~
MODPOST /home/dmx/dmx_usb_module/Module.symvers
CC [M] /home/dmx/dmx_usb_module/dmx_usb.mod.o
LD [M] /home/dmx/dmx_usb_module/dmx_usb.ko
BTF [M] /home/dmx/dmx_usb_module/dmx_usb.ko
Skipping BTF generation for /home/dmx/dmx_usb_module/dmx_usb.ko due to unavailability of vmlinux
make[1]: Leaving directory '/usr/src/linux-headers-5.15.0-46-generic'
gcc -O2 -pipe -Wall dmx_usb_test.c -o dmx_usb_test
