On Tue, May 27, 2003 at 01:22:37PM +0200, Ralf Baechle wrote: > [...] > portably refer to any piece of memory. If you have a cpu pointer > (which may be validly DMA'd too) you may easily obtain the page > and offset using something like this: > > struct page *page = virt_to_page(ptr); > unsigned long offset = ((unsigned long)ptr & ~PAGE_MASK); > [...] > > While it's officially documented I still don't like it. Hmm, I remembered that some ports used vmalloc-like allocators for this and virt_to_page doesn't work for those..
