Hi,
I'm still fighting with this problem, Here is what I found so far by
tracking the make calls hierarchy when compiling compat-wireless:
trunk> make package/mac80211/compile V=99 > |tee mac80211.log
trunk> grep ^make mac80211.log
make[1]: Entering directory `.../openwrt/trunk'
make[2]: Entering directory `.../openwrt/trunk/package/libnl-tiny'
make[2]: Leaving directory `.../openwrt/trunk/package/libnl-tiny'
make[2]: Entering directory `.../openwrt/trunk/package/crda'
make[2]: Leaving directory `.../openwrt/trunk/package/crda'
make[2]: Entering directory `.../openwrt/trunk/package/iw'
make[2]: Leaving directory `.../openwrt/trunk/package/iw'
make[2]: Entering directory `.../openwrt/trunk/package/wireless-tools'
make[2]: Leaving directory `.../openwrt/trunk/package/wireless-tools'
make[2]: Entering directory `.../openwrt/trunk/package/mac80211'
make -j1 -C
".../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27"
[snipped long argument list]
make[3]: Entering directory
`.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27'
Here i get a warning:
WARNING: CONFIG_CFG80211_WEXT will be deactivated or not working because
kernel was compiled with CONFIG_WIRELESS_EXT=n. Tools using wext
interface like iwconfig will not work. To activate it build your kernel
e.g. with CONFIG_LIBIPW=m.
my target's .config has CONFIG_WIRELESS_EXT=y, but the kernel .config in
the build dir don't ...
and CONFIG_LIBIPW seems to be realated to Intel PCI wireless cards...
make -C
.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27
modules
make[4]: Entering directory
`.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27'
make -C .../openwrt/trunk/build_dir/linux-at91_tmbbv3/linux-2.6.38.8
M=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27
modules V=1
make[5]: Entering directory
`.../openwrt/trunk/build_dir/linux-at91_tmbbv3/linux-2.6.38.8'
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/compat
Here the compat.o get built with main.o, compat-2.6.39.o, kstrtox.o,
compat-3.0.o and compat-3.2.o. At this stage the compat.o should have
the kstrtou8_from_user
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/drivers/misc/eeprom
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/drivers/net/usb
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/drivers/net/wireless
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/drivers/net/wireless/rt2x00
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/net/mac80211
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/net/wireless
make -f
.../openwrt/trunk/build_dir/linux-at91_tmbbv3/linux-2.6.38.8/scripts/Makefile.modpost
Here compat.ko is created
make[5]: Leaving directory
`.../openwrt/trunk/build_dir/linux-at91_tmbbv3/linux-2.6.38.8'
make[4]: Leaving directory
`.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27'
make -C .../openwrt/trunk/build_dir/linux-at91_tmbbv3/linux-2.6.38.8
M=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27
modules V=1
make[4]: Entering directory
`.../openwrt/trunk/build_dir/linux-at91_tmbbv3/linux-2.6.38.8'
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/compat
Now, here is the interesting stuff:
The compat.o get built again but this time with only compat.o and
main.o, does it mean that the build scripts think they build against a
3.2 kernel? Or maybe my kernel config has changed since then?
And strangely, the following make calls won't cause any objects to be
rebuilt (apart for compat.ko in modpost)
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/drivers/misc/eeprom
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/drivers/net/usb
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/drivers/net/wireless
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/drivers/net/wireless/rt2x00
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/net/mac80211
make -f scripts/Makefile.build
obj=.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/net/wireless
make -f
.../openwrt/trunk/build_dir/linux-at91_tmbbv3/linux-2.6.38.8/scripts/Makefile.modpost
make[4]: Leaving directory
`.../openwrt/trunk/build_dir/linux-at91_tmbbv3/linux-2.6.38.8'
make[3]: Leaving directory
`.../openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27'
make V=99 -j1 clean-staging
make[3]: Entering directory `.../openwrt/trunk/package/mac80211'
make[3]: Leaving directory `.../openwrt/trunk/package/mac80211'
make[2]: Leaving directory `.../openwrt/trunk/package/mac80211'
make[1]: Leaving directory `.../openwrt/trunk'
/me keep digging....
Chris
On 06/04/12 21:06, Christian Gagneraud wrote:
Hi,
I manage to dig a bit deeper, so actually the missing functions are in
compat-3.0.{c,h} from compat-wireless
The file compat-3.0.c is build into a .o, but for some reason compat.ko
links only to main.o.
So my .config in compat-wireless/ looks like:
export
CONFIG_COMPAT_KERNEL_2_6_39=y
CONFIG_COMPAT_KERNEL_3_0=y
CONFIG_COMPAT_KERNEL_3_1=y
CONFIG_COMPAT_KERNEL_3_2=y
CONFIG_COMPAT_KERNEL_3_3=y
But the .tmp_versions/compat.mod only reference main.o:
[...]/openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/compat/compat.ko
[...]/openwrt/trunk/build_dir/linux-at91_tmbbv3/compat-wireless-2012-02-27/compat/main.o
weird ....
Chris
On 06/04/12 20:00, Christian Gagneraud wrote:
Hi there,
I'm fighting with a problem of missing kernel symbol.
Basically kstrtou8_from_user is missing, as a consequence mac80211.ko
can't be loaded, and then all the rest of the 802.11 stack and my wifi
drivers.
At some point I manage to get it loading, but i don't know how I did,
and I can't reproduce it (reproducing the missing symbol situation is
way easier)
I'm not sure, but it seems to me that in my case using the 802.11 code
from the kernel works but using the modules from
compat-wireless-2012-02-27 doesn't...
After checking on the linux cross-reference, i found that this symbol
have been added to linux-3.0, and I'm running 2.6.38.8 ...
(see http://lxr.free-electrons.com/source/lib/kstrtox.c?v=3.0#L249)
My wifi device is a WPER-150gn (miniPCIe, Ralink RT3070 chipset on the
USB lane), the kernel module i need seems to be rt2800usb.ko
This module is selected from my subtarget's target.mk.
I'm using OpenWrt trunk, updated a couple of days ago (the problem was
already there before the last update I think).
To give u an insight on my configuration here are some traces when I
grep around for 80211 and kstrtou8_from_user:
http://pastebin.com/gAY5d99M
Could someone shed some light on how to fix this problem? Is it related
with compat-wireless or maybe it's because of my target or configuration?
Any help greatly appreciated.
Cheers,
Chris
--
Christian Gagneraud,
Embedded systems engineer.
Techworks Marine
1 Harbour road
Dun Laoghaire
Co. Dublin
Ireland
Tel: + 353 (0) 1 236 5990
Web: http://www.techworks.ie/
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