Rechercher une page de manuel
MAP_NR
Langue: en
Version: $Date:$ (mandriva - 22/10/07)
Section: 9 (Appels noyau Linux)
NAME
MAP_NR - get memory map index for page in kernel memorySYNOPSIS
#include <linux/mm.h>#define MAP_NR(page)
DESCRIPTION
- This macro maps the page of kernel memory to an index into the mem_map array. The input page is kernel-space page addresses such as those that come from the get_free_page(9) function. The expression mem_map[MAP_NR(page)] returns a pointer to a mem_map_t for the page in question.
Device drivers need access to the page structure if it is implimenting some special kind of memory segment, i.e. cache for a virtual frame buffer.
RETURN VALUE
Returns an index into the mem_map array.AVAILABILITY
Linux 2.0+SEE ALSO
get_free_pages(9)/usr/include/asm/page.h
AUTHOR
Stephen Williams <steve@icarus.com>BUGS
There is no check that the page you are passing really is a valid page address.Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre