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 #include <linux/io.h> 9 10 #include <asm/page.h> 11 #ifdef CONFIG_MIPS 12 #include <asm/bootinfo.h> 13 #endif 14 15 struct foo { 16 unsigned int bar; 17 }; 18 19 struct foo *foo; 20 test_debug_virtual_init(void)21 static int __init test_debug_virtual_init(void) 22 { 23 phys_addr_t pa; 24 void *va; 25 26 va = (void *)VMALLOC_START; 27 pa = virt_to_phys(va); 28 29 pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va); 30 31 foo = kzalloc(sizeof(*foo), GFP_KERNEL); 32 if (!foo) 33 return -ENOMEM; 34 35 pa = virt_to_phys(foo); 36 va = foo; 37 pr_info("PA: %pa for VA: 0x%lx\n", &pa, (unsigned long)va); 38 39 return 0; 40 } 41 module_init(test_debug_virtual_init); 42 test_debug_virtual_exit(void)43 static void __exit test_debug_virtual_exit(void) 44 { 45 kfree(foo); 46 } 47 module_exit(test_debug_virtual_exit); 48 49 MODULE_LICENSE("GPL"); 50 MODULE_DESCRIPTION("Test module for CONFIG_DEBUG_VIRTUAL"); 51