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brintos / linux-shallow public Read only

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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