page_address not working

[sidc7]

I am using the function page_address to get the virtual address of a page
using its pointer. I am using kernel 2.6.24 and page_address has been
exported. However, when I make a call to page_address in my kernel module,
it does not allow me to use it, saying, "Implict declaration of
page_address".

Is there any other way, I can get the virtual address of a page from a
pointer to its structure

Thanks
SC
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