PROBLEM: messed-up symbol names like "mysym_R__ver_mysym"

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To: linux-kernel@vger.kernel.org
Date:	Sat, 13 Dec 2003 01:52:27 +0100

according to REPORTING-BUGS;
[1.] messed-up symbol names like "bpm_new_device_R__ver_bpm_new_device"
[2.] Full description of the problem/report:
I have a problem with messed-up symbol names like
"bpm_new_device_R__ver_bpm_new_device"
after compiling a hardware device driver module bpm.c
which should export function "bpm_new_device"
to other modules which require it.

This happens with Kernel "2.4.21-99-default",
the default kernel of the newest distribution SuSE 9.0.
I'm not able to use a newer version,
as it runs on a number of reliable router/servers.
I didn't have this problem with all earlier kernel versions.
My coding conforms mostly to "O'Reilly Device Drivers v2".

The only thing I Googled out was "broke modversions" in
http://www.ussg.iu.edu/hypermail/linux/kernel/0206.2/0202.html
but the fix/patch for "Rules.make" didn't match at all.

Does anyone have a fix (for the Makefile, *.c, *.h) or a patch ?
Any help is greatly appreciated.

--Rainer

[3.] Keywords (i.e., modules, networking, kernel):
modules, ksyms, R__ver

[4.] Kernel version (from /proc/version):
Linux version 2.4.21-99-default (root@i386.suse.de) (gcc version 3.3.1 (SuSE Linux)) #1 Wed Sep 24 13:30:51 UTC 2003

[5.] Output of Oops.. message (if applicable) with symbolic information
     resolved (see Documentation/oops-tracing.txt)
No Oops.
># insmod bpm.o; ksyms | grep bpm
Address Symbol Defined by
c9762450 bpm_new_device_R__ver_bpm_new_device [bpm_2.4.21-99-default]
># insmod lcd.o (depends on that symbol)
/usr/beyond/modules/2.4.21-99-default/lcd.o: unresolved symbol bpm_new_device

[6.] A small shell script or example program which triggers the
     problem (if possible)
see [5]
[7.] Environment
[7.1.] Software (add the output of the ver_linux script here)
> ## sh /usr/src/linux-2.4.21-99/scripts/ver_linux
If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.

Linux router2 2.4.21-99-default #1 Wed Sep 24 13:30:51 UTC 2003 i686 i686 i386 GNU/Linux

Gnu C 3.3.1
Gnu make 3.80
util-linux 2.11z
mount 2.11z
modutils 2.4.25
e2fsprogs 1.34
jfsutils 1.1.2
PPP 2.4.1
isdn4k-utils 3.3
Linux C Library x 1 root root 1470060 Sep 23 18:22 /lib/libc.so.6
Dynamic linker (ldd) 2.3.2
Linux C++ Library 5.0.5
Procps 3.1.11
Net-tools 1.60
Kbd 1.08
Sh-utils 5.0
Modules Loaded bpm_2.4.21-99-default videodev snd-pcm-oss snd-mixer-oss isa-pnp nfsd usbserial parport_pc lp parport snd-via82xx snd-pcm snd-timer snd-ac97-codec thermal snd-page-alloc snd-mpu401-uart snd-rawmidi snd-seq-device processor ipv6 snd fan button soundcore key battery ac sd_mod scsi_mod keybdev mousedev joydev evdev input usb-uhci usbcore raw1394 ieee1394 8139too mii reiserfs

[7.2.] Processor information (from /proc/cpuinfo):
> ## cat /proc/cpuinfo
processor : 0
vendor_id : CentaurHauls
cpu family : 6
model : 7
model name : VIA Samuel 2
stepping : 2
cpu MHz : 797.903
cache size : 64 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu de tsc msr cx8 mtrr pge mmx 3dnow
bogomips : 1568.76

[7.3.] Module information (from /proc/modules):
> ## m /proc/modules
bpm_2.4.21-99-default 40428 0 (unused)
videodev 5696 0 (autoclean)
snd-pcm-oss 45152 1 (autoclean)
snd-mixer-oss 13400 2 (autoclean) [snd-pcm-oss]
isa-pnp 30664 0 (unused)
nfsd 73904 4 (autoclean)
usbserial 18620 0 (autoclean) (unused)
parport_pc 26248 1 (autoclean)
lp 6208 0 (autoclean)
parport 22888 1 (autoclean) [parport_pc lp]
snd-via82xx 13504 3
snd-pcm 65124 0 [snd-pcm-oss snd-via82xx]
snd-timer 15040 0 [snd-pcm]
snd-ac97-codec 39512 0 [snd-via82xx]
thermal 6148 0 (unused)
snd-page-alloc 6004 0 [snd-via82xx snd-pcm]
snd-mpu401-uart 3584 0 [snd-via82xx]
snd-rawmidi 14080 0 [snd-mpu401-uart]
snd-seq-device 4048 0 [snd-rawmidi]
processor 8248 0 [thermal]
ipv6 209824 -1 (autoclean)
snd 35172 0 [snd-pcm-oss snd-mixer-oss snd-via82xx snd-pcm snd-timer snd-ac97-codec snd-mpu401-uart snd-rawmidi snd-seq-device]
fan 1472 0 (unused)
button 2380 0 (unused)
soundcore 3588 0 [snd]
key 63256 0 (autoclean) [ipv6]
battery 5600 0 (unused)
ac 1664 0 (unused)
sd_mod 12320 0 (autoclean) (unused)
scsi_mod 97108 1 (autoclean) [sd_mod]
keybdev 1996 0 (unused)
mousedev 4084 0 (unused)
joydev 5120 0 (unused)
evdev 3584 0 (unused)
input 3360 0 [keybdev mousedev joydev evdev]
usb-uhci 22224 0 (unused)
usbcore 58668 1 [usbserial usb-uhci]
raw1394 16592 0 (unused)
ieee1394 183332 0 [raw1394]
8139too 13932 1
mii 2320 0 [8139too]
reiserfs 200084 1 (autoclean)

[7.4.] Loaded driver and hardware information (/proc/ioports, /proc/iomem)
not relevant
[7.5.] PCI information ('lspci -vvv' as root)
not relevant
[7.6.] SCSI information (from /proc/scsi/scsi)
not relevant
[7.7.] Other information that might be relevant to the problem
       (please look in /proc and include all information that you
       think to be relevant):
This is how it should look like (made with SuSE 8.2, Kernel 2.4.20-4GB):
> ## ksyms | grep bpm
c6902440 bpm_new_device [bpm]

[X.] Other notes, patches, fixes, workarounds:
no

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