Hello everyone.
I'm converting some scsi driver to use the kernel list API, and have a
question regarding the list handling.
The driver has several structs that represent the controllers, and
each controller has a list of work items. Suppose for example:
struct host_controller {
int foo;
struct list_head the_list;
};
struct work_item {
int blah;
void *zot;
struct list_head list_item;
};
Suppose I have 2 struct host_controllers, and 10 struct work_item per
controller.
I walk the list of work items for a controller, using list_for_each()
and then I get the struct work_item variable using
list_entry(cursor, struct work_item, list_item);
Now, from what I understand, the head of the list, the struct
host_controller variable, is in the list because its the_list is linked
with the rest of the struct list_head variables that make up the list.
What happens when list_for_each() hits struct host_controller's the_list
variable?
What happens when list_entry() tries to get me a struct work_item when in
reality the current struct list_head variable is in struct host_controller?
Is this legal?
Many thanks,
Srdjan
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