2007-01-02 11:11:12

by Leonard Norrgard

Subject: 2.6.20-rc3: bt878/bttv: Unknown symbols, despite being defined in module depended on

This seems a bit odd. As the bt878 module loads, I get the following
error messages, despite definitions in the bttv module that bt878
depends on:

# egrep '(bttv_read_gpio|bttv_write_gpio|bttv_gpio_enable)' /var/log/dmesg
bt878: Unknown symbol bttv_read_gpio
bt878: Unknown symbol bttv_write_gpio
bt878: Unknown symbol bttv_gpio_enable

SMP kernel, the cpu is an AMD Athlon(tm) 64 X2 Dual Core Processor 5200+.

Full dmesg output is at
http://bugzilla.kernel.org/attachment.cgi?id=9987&action=view (unrelated
bug, but same box).

Full config is at
http://bugzilla.kernel.org/attachment.cgi?id=9988&action=view (likewise).

Output of lspci -nn -vvx is at:
http://bugzilla.kernel.org/attachment.cgi?id=9989&action=view (likewise).

# modinfo bt878 | grep depends
depends: bttv

# nm dvb/bt8xx/bt878.ko | egrep
'(bttv_read_gpio|bttv_write_gpio|bttv_gpio_enable)'
U bttv_gpio_enable
U bttv_read_gpio
U bttv_write_gpio

# nm video/bt8xx/bttv.ko | egrep
'(bttv_read_gpio|bttv_write_gpio|bttv_gpio_enable)'
0000000011dc4b6d A __crc_bttv_gpio_enable
00000000bcf2d2fb A __crc_bttv_read_gpio
000000008ecf4acc A __crc_bttv_write_gpio
0000000000000018 r __kcrctab_bttv_gpio_enable
0000000000000020 r __kcrctab_bttv_read_gpio
0000000000000028 r __kcrctab_bttv_write_gpio
0000000000000040 r __kstrtab_bttv_gpio_enable
0000000000000051 r __kstrtab_bttv_read_gpio
0000000000000060 r __kstrtab_bttv_write_gpio
0000000000000030 r __ksymtab_bttv_gpio_enable
0000000000000040 r __ksymtab_bttv_read_gpio
0000000000000050 r __ksymtab_bttv_write_gpio
000000000000898c T bttv_gpio_enable
000000000000894d T bttv_read_gpio
0000000000008909 T bttv_write_gpio

2007-01-06 09:50:35

by Duncan Sands

Subject: Re: 2.6.20-rc3: bt878/bttv: Unknown symbols, despite being defined in module depended on

On Tuesday 2 January 2007 12:11, Leonard Norrgard wrote:
> This seems a bit odd. As the bt878 module loads, I get the following
> error messages, despite definitions in the bttv module that bt878
> depends on:
>
> # egrep '(bttv_read_gpio|bttv_write_gpio|bttv_gpio_enable)' /var/log/dmesg
> bt878: Unknown symbol bttv_read_gpio
> bt878: Unknown symbol bttv_write_gpio
> bt878: Unknown symbol bttv_gpio_enable

This may be related to MODULE_FORCE_UNLOAD=y.

Best wishes,

Duncan.