On Sat, Jan 14, 2012 at 06:00:26PM +0100, Andrea Arcangeli wrote: > Why don't you pass the pmd and then do "if (pmd_present(pmd)) > page_to_pfn(pmd_page(pmd)) ? What's the argument for the cast. I'm Of course I meant pmd_pfn above... in short as a replacement of the pte_pfn in your patch. About the _stable function, I was now thinking maybe _lock suffix is more appropriate than _stable, because that function effectively has the objective of taking the page_table_lock in the most efficient way, and not much else other than taking the lock. Adding a comment that it's only safe to call with the mmap_sem held in the inline version in the .h file (the one that then would call the __ version in the .c file). -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>