On Mon, Mar 23, 2020 at 11:27:50AM +0100, Tomek The Messenger wrote: > Hi > When I insert external kernel module which is compiled out of tree I got > error: > > root:/run# insmod ./my_module.ko > [ 137.443823] my_module: Unknown symbol reboot_mode (err 0) > > I investigated that I have attached in my my_module.c file: > #include <linux/reboot.h> > and in this file we have: > extern enum reboot_mode reboot_mode; > However reboot_mode symbol is not exported with macro EXPORT_SYMBOL_GPL. > Probably this is the reason why symbol is not seen in my module. That is correct. > Then why > the same issue doesn't occur here: > /arch/arm/kernel/setup.c > /arch/arm64/kernel/process.c > Those linux files also use global variable reboot_mode. Because those files are not built as a kernel module, but rather directly into the kernel image. hope this helps, greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
