struct page *page;
unsigned char *p;
p = page_address(page);

Other APIs:

• kmap_atomic
• __kunmap_atomic

Allocate pages

   struct page *page;
   page = alloc_pages(gfp, order);
   

Allocate one page

   struct page *page, *head;
   char *data="aljalf";
     
   /*allocate a page */
   page = alloc_page(gfp_mask);
   if (page) 
      memcpy(page_address(page),  data, strlen(data)+1 );
	
   /*free a page*/
   put_page(page );