On Jan 27, 9:27 am, Nayan wrote:
> Hi All,
> I am new to this group as well as for linux operating
> system .
>
> So far i wrote only one linux driver for pci sdhost.
>
> now i am trying to make stack for that i wrote one bus driver and one
> host driver .
>
> when i am loading bus module its get loaded properly and i am able to
> see it in sys/bus folder.but when i am trying to register the host
> with bus i am getting kernel tainted message .
>
> can any one help me in removing this problem.
>
> i am using linux 2.6.21.fc7
>
> any kind of help will be appreciated.
>
> Regards

do you use the MODULE_LICENSE("GNU") macro?

--
Gallon sylvestre
http://devsyl.blogspot.com
www.rathaxes.eu

do you use the MODULE_LICENSE("GNU") macro?
Hi,
Thanks for replying.

I am using MODULE_LICENSE("Dual GPL/BSD");


Regards

Nayan wrote:

> I am using MODULE_LICENSE("Dual GPL/BSD");

Which should not produce a tainted Kernel.

Sven

--
"In the land of the brave and the free, we defend our freedom
with the GNU GPL" (Richard M. Stallman on www.gnu.org)

/me is giggls@ircnet, http://sven.gegg.us/ on the Web

Hi ,
Soory for wrong information but i dont know weather it has any
impact or not i am using the
MODULE_LICENSE("Dual BSD/GPL");
if it is wrong plz tell me what i am supposed to use here.

following is the detailed output of compiling and loading the module

My kernel version is as follows

[root@localhost ~]# uname -r
2.6.21-1.3194.fc7
[root@localhost ~]#


Following is the warning that i am getting wile compile the bus module

[root@localhost sd_bus]# make

make -C /lib/modules/2.6.21-1.3194.fc7/build SUBDIRS=/usr/src/Nayan/
sd_stack/sd_bus modules

make[1]: Entering directory `/usr/src/kernels/2.6.21-1.3194.fc7-i686'

CC [M] /usr/src/Nayan/sd_stack/sd_bus/sdbus.o

/usr/src/Nayan/sd_stack/sd_bus/sdbus.c: In function
'show_sd_card_driver_version':


Why the following warning is coming what is the reason and how to
solve that
i am not able to understand if you can give me some hint it would be
very helpful.


/usr/src/Nayan/sd_stack/sd_bus/sdbus.c:142: warning: ISO C90 forbids
mixed declarations and code


Building modules, stage 2.

MODPOST 1 modules

CC /usr/src/Nayan/sd_stack/sd_bus/sdbus.mod.o

LD [M] /usr/src/Nayan/sd_stack/sd_bus/sdbus.ko

make[1]: Leaving directory `/usr/src/kernels/2.6.21-1.3194.fc7-i686'


following is the output of dmesg after loading the sdbus module.

sd_bus_init--->

<---sd_bus_init


after loading the bus module if i am checking the weather kernel has
been tainted or not by issung the following command result is 0 that
means kernel has been tainted if i am not wrong then.

[root@localhost sd_bus]# cat /proc/sys/kernel/tainted

0







following is te warning that i am getting while compiling the host
module

[root@localhost sd_host]# make

make -C /lib/modules/2.6.21-1.3194.fc7/build SUBDIRS=/usr/src/Nayan/
sd_stack/sd_host modules

make[1]: Entering directory `/usr/src/kernels/2.6.21-1.3194.fc7-i686'

CC [M] /usr/src/Nayan/sd_stack/sd_host/sdhost.o


Why the following warning is coming what is the reason and how to
solve that
i am not able to understand if you can give me some hint it would be
very helpful.

I am gussing because of this i am getting the segmenation fault wen i
try to double click over sdhost folder that gets created in sys/bus/
sdbus/ after registering the host with sdbus.

/usr/src/Nayan/sd_stack/sd_host/sdhost.c:68: warning: initialization
from incompatible pointer type


Building modules, stage 2.

MODPOST 1 modules

WARNING: "register_sd_host_device" [/usr/src/Nayan/sd_stack/sd_host/
sdhost.ko] undefined!

WARNING: "unregister_sd_host_device" [/usr/src/Nayan/sd_stack/sd_host/
sdhost.ko] undefined!

CC /usr/src/Nayan/sd_stack/sd_host/sdhost.mod.o

LD [M] /usr/src/Nayan/sd_stack/sd_host/sdhost.ko

make[1]: Leaving directory `/usr/src/kernels/2.6.21-1.3194.fc7-i686'

[root@localhost sd_host]#




following is the output of dmesg after loading the sdbus module.

sd_bus_init--->

<---sd_bus_init


sd_bus_init--->

<---sd_bus_init





sdhost: no version for "unregister_sd_host_device" found: kernel
tainted.

sd_host_init--->

register_sd_host_device--->





BUS_ID:=SdHost

Name:=SdHost



<---register_sd_host_device





device_create_file returned :0

<---sd_host_init



after loading the bus module if i am checking the weather kernel has
been tainted or not by issung the following command result is 2 that
means kernel has been tainted twice if i am not wrong then.

[root@localhost sd_host]# cat /proc/sys/kernel/tainted

2








following is the result when i am trying to load the sdhost module
indivisually after commenting the following two line.

//register_sd_host_device(&pSdHost->sdhost);



//iRet = device_create_file(&pSdHost-
>sdhost.SdHostDevice,&dev_attr_sd_host_version);


// unregister_sd_card_driver(&sd_mem_card);



// device_remove_file(&pSdHost-
>sdhost.SdHostDevice,&dev_attr_sd_host_version);


[root@localhost sd_host]# make

make -C /lib/modules/2.6.21-1.3194.fc7/build SUBDIRS=/usr/src/Nayan/
sd_stack/sd_host modules

make[1]: Entering directory `/usr/src/kernels/2.6.21-1.3194.fc7-i686'

CC [M] /usr/src/Nayan/sd_stack/sd_host/sdhost.o

/usr/src/Nayan/sd_stack/sd_host/sdhost.c:68: warning: initialization
from incompatible pointer type

/usr/src/Nayan/sd_stack/sd_host/sdhost.c:68: warning:
'dev_attr_sd_host_version' defined but not used

Building modules, stage 2.

MODPOST 1 modules

CC /usr/src/Nayan/sd_stack/sd_host/sdhost.mod.o

LD [M] /usr/src/Nayan/sd_stack/sd_host/sdhost.ko

make[1]: Leaving directory `/usr/src/kernels/2.6.21-1.3194.fc7-i686'

[root@localhost sd_host]#

[root@localhost sd_host]#

[root@localhost sd_host]# cat /proc/sys/kernel/tainted

0

[root@localhost sd_host]# insmod sdhost.ko

[root@localhost sd_host]# cat /proc/sys/kernel/tainted

0

[root@localhost sd_host]#



following is the output after loading the sdhost module indivisually


sd_host_init--->

device_create_file returned :3

<---sd_host_init

[root@localhost sd_host]#


if you people think without taking a look of the code its hard to
figure out the problem plz give me your mail id i will send you the
code.

Regards