[mirror_ubuntu-bionic-kernel.git] / lib / test_debug_virtual.c

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/export.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/sizes.h>

#include <asm/page.h>
#ifdef CONFIG_MIPS
#include <asm/bootinfo.h>
#endif

struct foo {
	unsigned int bar;
};

struct foo *foo;

static int __init test_debug_virtual_init(void)
{
	phys_addr_t pa;
	void *va;

	va = (void *)VMALLOC_START;
	pa = virt_to_phys(va);

	pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va);

	foo = kzalloc(sizeof(*foo), GFP_KERNEL);
	if (!foo)
		return -ENOMEM;

	pa = virt_to_phys(foo);
	va = foo;
	pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va);

	return 0;
}
module_init(test_debug_virtual_init);

static void __exit test_debug_virtual_exit(void)
{
	kfree(foo);
}
module_exit(test_debug_virtual_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Test module for CONFIG_DEBUG_VIRTUAL");
Commit	Line	Data
e4dace36 FF	1	#include <linux/kernel.h>
	2	#include <linux/module.h>
	3	#include <linux/export.h>
	4	#include <linux/mm.h>
	5	#include <linux/vmalloc.h>
	6	#include <linux/slab.h>
	7	#include <linux/sizes.h>
	8
	9	#include <asm/page.h>
	10	#ifdef CONFIG_MIPS
	11	#include <asm/bootinfo.h>
	12	#endif
	13
	14	struct foo {
	15	unsigned int bar;
	16	};
	17
	18	struct foo *foo;
	19
	20	static int __init test_debug_virtual_init(void)
	21	{
	22	phys_addr_t pa;
	23	void *va;
	24
	25	va = (void *)VMALLOC_START;
	26	pa = virt_to_phys(va);
	27
	28	pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va);
	29
	30	foo = kzalloc(sizeof(*foo), GFP_KERNEL);
	31	if (!foo)
	32	return -ENOMEM;
	33
	34	pa = virt_to_phys(foo);
	35	va = foo;
	36	pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va);
	37
	38	return 0;
	39	}
	40	module_init(test_debug_virtual_init);
	41
	42	static void __exit test_debug_virtual_exit(void)
	43	{
	44	kfree(foo);
	45	}
	46	module_exit(test_debug_virtual_exit);
	47
	48	MODULE_LICENSE("GPL");
	49	MODULE_DESCRIPTION("Test module for CONFIG_DEBUG_VIRTUAL");