Re: Bug while executing : cat /proc/iomem on 2.6.17-rc1/rc2

[Sachin Sant]

Russell King wrote:

> Only the root should have a NULL parent, so this is just covering up some
> other problem - you have a resource which somehow has illegally ended up
> with a NULL parent pointer while it's been registered.
>
> Maybe try adding:
>
> 		if (p->parent == NULL) {
> 			printk("resource with null parent: %lx-%lx: %s\n",
> 				p->start, p->end, p->name);
> 			break;
> 		}
>
> just before the test in that loop, and then finding out why that resource
> is becoming invalid.
>
>  
I get this output in dmesg with the above code.

resource with null parent: 0-57ffffff: System RAM
resource with null parent: 0-57ffffff: System RAM

x236:/home/sharyathi/linux-2.6.17-rc1/kernel # cat /proc/iomem
00000000-0009dbff : System RAM
0009dc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000cafff : Video ROM
000cb000-000cc5ff : Adapter ROM
000f0000-000fffff : System ROM
00100000-c7fcb5ff : System RAM
 00100000-004ff436 : Kernel code
 004ff437-0068881f : Kernel data
x236:/home/sharyathi/linux-2.6.17-rc1/kernel #



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