LXR linux/include/linux/page

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _LINUX_PAGE_REPORTING_H
   3#define _LINUX_PAGE_REPORTING_H
   4
   5#include <linux/mmzone.h>
   6#include <linux/scatterlist.h>
   7
   8/* This value should always be a power of 2, see page_reporting_cycle() */
   9#define PAGE_REPORTING_CAPACITY         32
  10
  11struct page_reporting_dev_info {
  12        /* function that alters pages to make them "reported" */
  13        int (*report)(struct page_reporting_dev_info *prdev,
  14                      struct scatterlist *sg, unsigned int nents);
  15
  16        /* work struct for processing reports */
  17        struct delayed_work work;
  18
  19        /* Current state of page reporting */
  20        atomic_t state;
  21
  22        /* Minimal order of page reporting */
  23        unsigned int order;
  24};
  25
  26/* Tear-down and bring-up for page reporting devices */
  27void page_reporting_unregister(struct page_reporting_dev_info *prdev);
  28int page_reporting_register(struct page_reporting_dev_info *prdev);
  29#endif /*_LINUX_PAGE_REPORTING_H */
  30