// SPDX-License-Identifier: GPL-2.0+
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/*
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* test_free_pages.c: Check that free_pages() doesn't leak memory
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* Copyright (c) 2020 Oracle
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* Author: Matthew Wilcox <willy@infradead.org>
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*/
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#include <linux/gfp.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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static void test_free_pages(gfp_t gfp)
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{
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unsigned int i;
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for (i = 0; i < 1000 * 1000; i++) {
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unsigned long addr = __get_free_pages(gfp, 3);
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struct page *page = virt_to_page(addr);
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/* Simulate page cache getting a speculative reference */
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get_page(page);
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free_pages(addr, 3);
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put_page(page);
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}
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}
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static int m_in(void)
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{
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test_free_pages(GFP_KERNEL);
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test_free_pages(GFP_KERNEL | __GFP_COMP);
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return 0;
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}
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static void m_ex(void)
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{
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}
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module_init(m_in);
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module_exit(m_ex);
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MODULE_AUTHOR("Matthew Wilcox <willy@infradead.org>");
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MODULE_LICENSE("GPL");
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