gup.c File Reference

#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <linux/vmstat.h>
#include <linux/pagemap.h>
#include <linux/rwsem.h>
#include <asm/pgtable.h>

Go to the source code of this file.

Functions
int	__get_user_pages_fast (unsigned long start, int nr_pages, int write, struct page **pages)
int	get_user_pages_fast (unsigned long start, int nr_pages, int write, struct page **pages)

Function Documentation

int __get_user_pages_fast	(	unsigned long	start,
		int	nr_pages,
		int	write,
		struct page **	pages
	)

Definition at line 170 of file gup.c.

int get_user_pages_fast	(	unsigned long	start,
		int	nr_pages,
		int	write,
		struct page **	pages
	)

get_user_pages_fast() - pin user pages in memory : starting user address : number of pages from start to pin : whether pages will be written to : array that receives pointers to the pages pinned. Should be at least nr_pages long.

Attempt to pin user pages in memory without taking mm->mmap_sem. If not successful, it will fall back to taking the lock and calling get_user_pages().

Returns number of pages pinned. This may be fewer than the number requested. If nr_pages is 0 or negative, returns 0. If no pages were pinned, returns -errno.

Definition at line 218 of file gup.c.