super_blocks没有导出

在模块中，通过查询super_blocks列表，来遍历系统中的所有super_block，但是出现与下面类似的错误：

http://stackoverflow.com/q/5051111/941650

也可以参考他的解决方法，到System.map中去查找真实地址，不过这样不是解决问题的最好方法。

先贴出当前的代码

   1: #include <linux/module.h>

   2: #include <linux/fs.h>

   3:  

   4: MODULE_LICENSE("GPL");

   5:  

   6:  

   7: void printRawData(unsigned long size, const u_char* data)

   8: {

   9:     if (size == 0)

  10:     {

  11:         return;

  12:     }

  13:  

  14:     printk("Memory at 0x%08x\n", (u32)data);

  15:     unsigned long i = 0;

  16:     for (i=0;i<16;i++)

  17:     {

  18:         printk("%4X", i);

  19:     }

  20:     printk("\n");

  21:     for (i=0;i<16;i++)

  22:     {

  23:         printk("%4s", "__");

  24:     }

  25:  

  26:     char lineSummary[17] = {0,};

  27:     unsigned long pos = 0;

  28:     for (i=0;i<size;i++)

  29:     {

  30:         if ((pos = i % 16) == 0)

  31:         {

  32:             if (i != 0)

  33:             {

  34:                 printk(" ---- %s\n", lineSummary);

  35:                 memset(lineSummary, 0, 17);

  36:             }

  37:             else

  38:             {

  39:                 printk("\n");

  40:             }        

  41:         }

  42:  

  43:         printk("  %02X", *(data + i));

  44:  

  45:         if (*(data + i) >= 0x20 && *(data + i) <= 0x7E)

  46:         {

  47:             lineSummary[pos] = *(data + i);

  48:         }

  49:         else

  50:         {

  51:             lineSummary[pos] = ' ';

  52:         }

  53:     }

  54:  

  55:     if (size % 16 != 0)

  56:     {

  57:         for (i=0;i<16 - (size%16);i++)

  58:         {

  59:             printk("    ");

  60:         }

  61:     }

  62:  

  63:     printk(" ---- %s\n", lineSummary);

  64:     printk("\n");    

  65: }

  66:  

  67: void AnalyzeSuperBlock()

  68: {

  69:     struct super_block* item;

  70:     struct list_head * super_blocks = 0xc1778bc0;

  71:  

  72:     list_for_each_entry(item,super_blocks,s_list)

  73:     {

  74:         printk("super_block 0x%08X %s\n", item, item->s_id);

  75:     }

  76: }

  77:  

  78: static int pslist_init()

  79: {

  80:     printk("###################################################################\n");

  81:     AnalyzeSuperBlock();

  82:     return 0;

  83: }

  84:  

  85: static void pslist_exit()

  86: {

  87:     printk("###################################################################\n");

  88: }

  89:  

  90:  

  91:  

  92: module_init(pslist_init);

  93: module_exit(pslist_exit);

结果：

   1: [153479.359674] ###################################################################

   2: [153479.359677] super_block 0xF5404800 sysfs

   3: [153479.359678] super_block 0xF5404A00 rootfs

   4: [153479.359679] super_block 0xF5404C00 bdev

   5: [153479.359680] super_block 0xF5404E00 proc

   6: [153479.359681] super_block 0xF545AC00 tmpfs

   7: [153479.359682] super_block 0xF545AE00 devtmpfs

   8: [153479.359683] super_block 0xF5464400 debugfs

   9: [153479.359684] super_block 0xF5464A00 sockfs

  10: [153479.359685] super_block 0xF551F800 pipefs

  11: [153479.359686] super_block 0xF551FA00 anon_inodefs

  12: [153479.359686] super_block 0xF551FC00 securityfs

  13: [153479.359687] super_block 0xF5792200 devpts

  14: [153479.359688] super_block 0xF57A8000 hugetlbfs

  15: [153479.359689] super_block 0xF57A8800 mqueue

  16: [153479.359690] super_block 0xF4C57000 sysfs

  17: [153479.359691] super_block 0xF4C4AC00 tmpfs

  18: [153479.359692] super_block 0xF4DB3C00 fusectl

  19: [153479.359693] super_block 0xF4D57000 sda1

  20: [153479.359694] super_block 0xF4C99600 tmpfs

  21: [153479.359695] super_block 0xF4D3CC00 tmpfs

  22: [153479.359696] super_block 0xEF20DC00 binfmt_misc

  23: [153479.359697] super_block 0xF2F23C00 vboxsf

  24: [153479.359698] super_block 0xEF12AA00 vboxsf

  25: [153479.359699] super_block 0xEE76B800 vboxsf

  26: [153479.359700] super_block 0xF2CBC600 fuse

  27: [153479.359701] super_block 0xEDA70400 vboxsf

  28: [153479.361922] ###################################################################