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Old 11-20-2007, 10:21 PM   #1
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porting linux kernel list operation to user space?

Now I have to porting some kernel space code to user space, but these code contains a lot of list operation, so is it possible to porting linux kernel list operation (/kernel src/include/linux/list.h) to user space, i did some test, but failed/

Old 11-21-2007, 03:17 PM   #2
Registered: Feb 2002
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Distribution: Debian
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It should not be a very hard task, as it's mostly macro-based. You will have to remove some kernel-specific stuff, but not that much. What have you tries and what were the errors?
Old 11-24-2007, 06:49 AM   #3
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I just add code in list.h:
#define LIST_POISON1 ((void *) 0x00100100)
#define LIST_POISON2 ((void *) 0x00200200)
#define prefectch(x) 1
#define smp_wmb(x) 1

#define offsetof(TYPE, MEMBER) ((size_t)&((TYPE*)0)->MEMBER)

#define container_of(ptr, type, member)({ \
const typeof(((type*) 0)->member)*__mptr=(ptr); \
(type*)((char*)__mpt-offsetof(type, member));})
my test code is
struct kool_list{
int to;
struct list_head list;

int print_string_init(void)
char ret[256];
struct kool_list *tmp;
struct list_head *pos, *q;
unsigned int i;
unsigned int j = 10;

struct kool_list mylist;
for(i = 5; i!=0; --i){
tmp = (struct kool_list *)malloc(sizeof(struct kool_list));
tmp->to = j;
list_add(&(tmp->list), &(mylist.list));

printf("traversing the list using list_for_each().");

list_for_each(pos, &mylist.list){
tmp = list_entry(pos, struct kool_list, list);
sprintf(ret, "to = %d", tmp->to);

I get compiler error message in line
tmp = list_entry(pos, (struct kool_list), list);

syntex error: '{'
syntex error: ')'
syntex error: ')'
syntex error: missing ':' before ')'
syntex error: missing ')' before string
'__mpt': undeclared identifier

Last edited by soararing; 11-24-2007 at 08:08 AM.


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