LXR linux/lib/test_debug

   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
  14struct foo {
  15        unsigned int bar;
  16};
  17
  18static struct foo *foo;
  19
  20static 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}
  40module_init(test_debug_virtual_init);
  41
  42static void __exit test_debug_virtual_exit(void)
  43{
  44        kfree(foo);
  45}
  46module_exit(test_debug_virtual_exit);
  47
  48MODULE_LICENSE("GPL");
  49MODULE_DESCRIPTION("Test module for CONFIG_DEBUG_VIRTUAL");
  50