Problem with SMP

["Ajit Anand Shrivastav" <ajeetshree@rediffmail.com>]

Hello,
I have got an application level code and driver(kernel) level 
code.
Application level code contains the whole logic of the device 
driver.driver is very light weight as it just provides interface 
of the device to the application.

The above application and kernel level code works perfectly on 
uni-processor machine.
To port the code on SMP environment I havent made any changes to 
the application level code and just put some spinlocks for global 
variables in the driver (kernel level) code.
Now the application is not functioning consistently on SMP 
system.
The application hangs in between but the system remains stable and 
the time of the application failure is also not fixed thats why i 
m finding it difficult to trace the bug.
Now can u tell me whether i need to modify the application level 
code also to make the whole driver SMP compliant.

Thanx and regds
Ajit Shrivastav