> > Problem:if I firstly insert my kmod_test.ko, then insert eventfd_link.ko, > > error will happen with hint " Device or resource busy". This is because > > the default minor device number, 0, has been occupied by my kmod_test.ko . > > > > root at distro:~/test$ lsmod > > Module Size Used by > > kmod_test 927 0 > > vboxsf 35930 4 > > vboxguest 222130 1 vboxsf > > microcode 10315 0 > > autofs4 25051 0 > > root at distro:~/test$ insmod ./eventfd_link.ko > > insmod: ERROR: could not insert module ./eventfd_link.ko: Device or > > resource busy > > > > Explanation: For miscdevices, the major device_no is same, so the minor > > device_no should be set to ditinguish different misc devices; if not set > > the minor, it may fail while insmod due to the default minor value, 0, has > > been used by other miscdevice. MISC_DYNAMIC_MINOR means to let Linux > > kernel dynamically assign one minor devide number while loading. > > > > Signed-off-by: Xiaobo Chi <xiaobo.chi at nokia.com> > Acked-by: Yuanhan Liu <yuanhan.liu at linux.intel.com>
Applied, thanks
