Im evidently missing something wrt module dependency. When I reboot my test box, pc87360 is missing a dependency on (a new, exploratory module) siolock. soekris:~# lsmod Module Size Used by siolock 4612 0 uhci_hcd 29168 0 ohci_hcd 18820 0 usbcore 101008 2 uhci_hcd,ohci_hcd sc1200 6784 0 [permanent] scx200_gpio 3876 0 scx200 4528 1 scx200_gpio pc87360 22192 0 hwmon_vid 2496 1 pc87360 i2c_isa 5536 1 pc87360 i2c_core 21456 2 pc87360,i2c_isa soekris:~# The wierd thing is that the If I rmmod pc87360, then modprobe it, the dependency appears, as expected. soekris:~# lsmod Module Size Used by pc87360 22836 0 siolock 4612 1 pc87360 uhci_hcd 29168 0 ohci_hcd 18820 0 usbcore 101008 2 uhci_hcd,ohci_hcd sc1200 6784 0 [permanent] scx200_gpio 3876 0 scx200 4528 1 scx200_gpio hwmon_vid 2496 1 pc87360 i2c_isa 5536 1 pc87360 i2c_core 21456 2 pc87360,i2c_isa soekris:~# this is on kernel.org 2.6.15 + my siolock hackery, patch attached. Also, since its attached, feel free to comment on it. (perhaps with different subject, same thread) The intent is to provide locking of sio-ports without creating dependencies between otherwize unrelated drivers. My use-case is drivers/hwmon/pc87360 vs drivers/char/pc87360_gpio (Ive written it, but it needs much work). The modules are unrelated, except for a lock on the sio-port, and they would seem to belong in different subsystems (drivers/hwmon vs drivers/char) The pc87360 has 15 functional units, cost: more complexity (nominal?) size with debug, (which can be vastly trimmed,) text data bss dec hex filename 1532 26 4 1562 61a siolock.o 2195 348 4 2547 9f3 siolock.ko benefit: - pc87360_gpio has no dependency on pc87360 13869 2780 20 16669 411d pc87360.ko - same could apply for other drivers - possible to avoid some outb() cycles (may be negligible) may also be out-weighed by extra checking. - maybe can shrink pc87360 a bit its currently mostly unmodified, sio_locks are taken during _init, but module does its own locking when reading sensors. thanks in advance -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
