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1// SPDX-License-Identifier: GPL-2.0-only2#include <linux/kernel.h>3#include <linux/module.h>4#include <linux/export.h>5#include <linux/mm.h>6#include <linux/vmalloc.h>7#include <linux/slab.h>8#include <linux/sizes.h>9#include <linux/io.h>10 11#include <asm/page.h>12#ifdef CONFIG_MIPS13#include <asm/bootinfo.h>14#endif15 16struct foo {17 unsigned int bar;18};19 20static struct foo *foo;21 22static int __init test_debug_virtual_init(void)23{24 phys_addr_t pa;25 void *va;26 27 va = (void *)VMALLOC_START;28 pa = virt_to_phys(va);29 30 pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va);31 32 foo = kzalloc(sizeof(*foo), GFP_KERNEL);33 if (!foo)34 return -ENOMEM;35 36 pa = virt_to_phys(foo);37 va = foo;38 pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va);39 40 return 0;41}42module_init(test_debug_virtual_init);43 44static void __exit test_debug_virtual_exit(void)45{46 kfree(foo);47}48module_exit(test_debug_virtual_exit);49 50MODULE_LICENSE("GPL");51MODULE_DESCRIPTION("Test module for CONFIG_DEBUG_VIRTUAL");52