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This commit is contained in:
Bahadir Balban
2008-03-14 18:53:53 +00:00
parent b0900ad6c3
commit 1cc6a87547
3 changed files with 43 additions and 25 deletions
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19
tasks/mm0/src/fault.c
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@@ -31,8 +31,8 @@ unsigned long fault_to_file_offset(struct fault_data *fault)
}
/*
* Given a reference to a vm_object link, returns the next link.
* If back to given head, returns 0.
* Given a reference to a vm_object link, returns the next link but
* avoids wrapping around back to head. If next is head, returns 0.
*
* vma->link1->link2->link3
* | | |
@@ -47,7 +47,7 @@ struct vm_obj_link *vma_next_link(struct list_head *link,
struct list_head *head)
{
BUG_ON(list_empty(link));
if (link == head)
if (link->next == head)
return 0;
else
return list_entry(link->next, struct vm_obj_link, list);
@@ -179,6 +179,18 @@ int vma_merge_link(struct vm_object *vmo)
return 0;
}
struct vm_obj_link *vm_objlink_create(void)
{
struct vm_obj_link *vmo_link;
if (!(vmo_link = kzalloc(sizeof(*vmo_link))))
return PTR_ERR(-ENOMEM);
INIT_LIST_HEAD(&vmo_link->list);
INIT_LIST_HEAD(&vmo_link->shref);
return vmo_link;
}
/*
* Creates a bare vm_object along with its vma link, since
* the shadow will be immediately used in a vma object list.
@@ -196,6 +208,7 @@ struct vm_obj_link *vma_create_shadow(void)
return 0;
}
INIT_LIST_HEAD(&vmo_link->list);
INIT_LIST_HEAD(&vmo_link->shref);
vmo->flags = VM_OBJ_SHADOW;
vmo_link->obj = vmo;