pte Not Present?

["Pedro Nunes da Costa" <pncosta@dei.uc.pt>]

Hi,

 

I'm writing a kernel module.

 

When I try to obtain the pte of an address like 0x0005000, I get informed that pte is not present.

 

That is not possible. It's Kernel code!!

 

The c code is like:

 

pgd_t dir = pgd_offset(current->mm,addr);
pmd_t pmd = pmd_offset(dir,addr);
pte_t pte = pte_alloc_offset(pmd,addr);

What's wrong??

 

Thanks,

 

Pedro