Recompiling 8xx uart driver as loadable module

[nam ho]

Greeting all,

I am developing my application on TQM8xxL with linux kernel 2.6.11.7 and  tosatti.patch file. It can run on TQM8xxL. But I want to recompile uart driver as loadable module, there are problem while linking object file belows:

_ I configured kernel to supporting loadable module:

#
# Loadable module support
#
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_OBSOLETE_MODPARM=y
CONFIG_MODVERSIONS=y
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_KMOD=y

_ And configured uart driver as loadable module:

#
# Character devices
#
# CONFIG_VT is not set
# CONFIG_SERIAL_NONSTANDARD is not set

#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set

#
# Non-8250 serial port support
#
CONFIG_SERIAL_CORE=m
CONFIG_SERIAL_CPM=m
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set

_ And after compiling kernel image successful, I compiled modules, these following warning appeared:

[root at main linux-2.6.11.7_src]# make ARCH=ppc CROSS_COMPILE=ppc_8xx- modules
  CHK     include/linux/version.h
make[1]: `arch/ppc/kernel/asm-offsets.s' is up to date.
  CC [M]  drivers/serial/serial_core.o
  CC [M]  drivers/serial/cpm_uart/cpm_uart_core.o
drivers/serial/cpm_uart/cpm_uart_core.c:732: warning: `cpm_uart_init_smc' defined but not used
drivers/serial/cpm_uart/cpm_uart_core.c:671: warning: `cpm_uart_init_scc' defined but not used
  CC [M]  drivers/serial/cpm_uart/cpm_uart_cpm1.o
  LD [M]  drivers/serial/cpm_uart/cpm_uart.o
  Building modules, stage 2.
  MODPOST
*** Warning: "cpm_setbrg" [drivers/serial/cpm_uart/cpm_uart.ko] undefined!
*** Warning: "m8xx_cpm_hostalloc" [drivers/serial/cpm_uart/cpm_uart.ko] undefined!
*** Warning: "cpmp" [drivers/serial/cpm_uart/cpm_uart.ko] undefined!
  CC      drivers/serial/cpm_uart/cpm_uart.mod.o
  LD [M]  drivers/serial/cpm_uart/cpm_uart.ko
  CC      drivers/serial/serial_core.mod.o
  LD [M]  drivers/serial/serial_core.ko
[root at main linux-2.6.11.7_src]#

_ I don't know why It can't linking with the symbols cpm_setbrg, m8xx_cpm_hostalloc, cpmp. Although these were implemented on commproc.c and has been compiled as commproc.o in arch/ppc/8xx_io/ folder of kernel source file.

Anyone can help me to fix it.

Thanks,
Nam Ho.




 
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