Unused variable warning while using a pointer

[divyaplayhard]

void lock_fun( void *dev)
{
os_dev *osdev = (os_dev *)dev;
SPIN_LOCK(&osde v->tx_lock);
return;
}

Here I am getting a warning - unused variable osdev. The variable is being used but still I am getting the warning. Can someone please help me out with the same?

[weaknessforcats]

This looks odd:

SPIN_LOCK[B](&osdev->tx[/B]_lock);

osdev is a pointer. Do you mean: &(osdev-tx) ? That would be he address of the tx member of osdev. Assuming of course the typecast works.

&osdev->tx would be the address of osdev so you aren't really using osdev itself.

I don't see any prototypes ere so I don't know what these functions are expecting.