Eric Lee / smarc-fsl-linux-kernel

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lib/test_debug_virtual.c 981 Bytes
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09c434b8a   Thomas Gleixner   treewide: Add SPD... 
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  // SPDX-License-Identifier: GPL-2.0-only
e4dace361   Florian Fainelli   lib: add test mod... 
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  #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>
10fdf838e   Christophe Leroy   lib: fix build fa... 
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  #include <linux/io.h>
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  #include <asm/page.h>
  #ifdef CONFIG_MIPS
  #include <asm/bootinfo.h>
  #endif
  
  struct foo {
  	unsigned int bar;
  };
b15f5f1ae   Colin Ian King   lib/test_debug_vi... 
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  static struct foo *foo;
e4dace361   Florian Fainelli   lib: add test mod... 
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  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
  ", &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
  ", &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");