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