> Hmm. As of 2.6.9 at least, clear_page() is only ever called by > clear_user_page(), which in turn is only ever called by > drivers/media/video/video-buf.c. I'm not using that driver, which > explains why the instruction didn't show up when I disassembled the kernel. Dont forget mm/memory.c:clear_user_highpage -> clear_user_page. Anton