Another different problem with list_head

[Vincenzo Mallozzi <vinjunior@xxxxxxxx>]

Hi all,
I've another problem with list_head. This problem is different from the 
previous one I've encountered (I've resolved it).
I've now the following code:

 
struct mtpmc_pages{
    struct list_head list;
    unsigned long addr;
    char page[PAGE_SIZE];
};

struct mtpmc_mm_struct{
    .......
    struct list_head pages_list;
};

struct mtpmc_mm_struct  mtpmc_dump_memory_descriptor(struct mm_struct *mm)
{
    struct mtpmc_mm_struct md;
    struct list_head *temp_list;
    struct mtpmc_wrprotected_pages *wrpage;
    pte_t *pte;
    struct page *page;
    struct mtpmc_pages *temp_page;

    INIT_LIST_HEAD(&md.pages_list);
    for (each address "address" we need) do{
        temp_page = (struct mtpmc_pages*) vmalloc(sizeof(struct mtpmc_pages));
        INIT_LIST_HEAD(&temp_page->list);
        temp_page->addr = address;
        mtpmc_read_page(address, temp_page->page);/*this fills the "page"         
                                                field" of temp_page */
        list_add(&temp_page->list, &md.pages_list);
    }

    return md;
}

void other_function()
{
    struct list_head *temp_list;
    struct mtpmc_pages *temp_page;
    struct mtpmc_mm_struct md =mtpmc_dump_memory_descriptor(mm);

    printk(KERN_DEBUG "mtpmc:listing addresses added\n");
    list_for_each(temp_list, &md.pages_list){
        temp_page = list_entry(temp_list, struct mtpmc_pages, list);
        printk(KERN_DEBUG "mtpmc: temp_page->addr = %08lx\n", 
                                        temp_page->addr);
    }
    return;
}


The problem is in other_function function where I only scan the list created 
in the previous function. 
If I do this scanning within the mtpmc_dump_memory_descriptor function after 
the creation of the list, the right elements are printed but in 
other_function fuction are listed more elements that the ones I've inserted 
in. And then segfault.
I don't know where is the problem as the list seems to be well filled.
Thanks.
Vincenzo Mallozzi.

	

	
		
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