linux/fs/drop_caches.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Implement the manual drop-all-pagecache function
 */

#include <linux/pagemap.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/writeback.h>
#include <linux/sysctl.h>
#include <linux/gfp.h>
#include <linux/swap.h>
#include "internal.h"

/* A global variable is a bit ugly, but it keeps the code simple */
int sysctl_drop_caches;

static void drop_pagecache_sb(struct super_block *sb, void *unused)
{ … }

int drop_caches_sysctl_handler(const struct ctl_table *table, int write,
		void *buffer, size_t *length, loff_t *ppos)
{ … }