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authorJason Baron <jbaron@akamai.com>2019-01-09 13:43:24 +0100
committerJiri Kosina <jkosina@suse.cz>2019-01-11 20:51:24 +0100
commit20e55025958e18e671d92c7adea00c301ac93c43 (patch)
tree3c2a116fee563aa31fd637a34d28fb6254885568 /kernel/livepatch
parent958ef1e39d24d6cb8bf2a7406130a98c9564230f (diff)
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livepatch: Use lists to manage patches, objects and functions
Currently klp_patch contains a pointer to a statically allocated array of struct klp_object and struct klp_objects contains a pointer to a statically allocated array of klp_func. In order to allow for the dynamic allocation of objects and functions, link klp_patch, klp_object, and klp_func together via linked lists. This allows us to more easily allocate new objects and functions, while having the iterator be a simple linked list walk. The static structures are added to the lists early. It allows to add the dynamically allocated objects before klp_init_object() and klp_init_func() calls. Therefore it reduces the further changes to the code. This patch does not change the existing behavior. Signed-off-by: Jason Baron <jbaron@akamai.com> [pmladek@suse.com: Initialize lists before init calls] Signed-off-by: Petr Mladek <pmladek@suse.com> Acked-by: Miroslav Benes <mbenes@suse.cz> Acked-by: Joe Lawrence <joe.lawrence@redhat.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Kosina <jikos@kernel.org> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'kernel/livepatch')
-rw-r--r--kernel/livepatch/core.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index bd41b03a72d5..37d0d3645fa6 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -659,20 +659,25 @@ static int klp_init_patch_early(struct klp_patch *patch)
return -EINVAL;
INIT_LIST_HEAD(&patch->list);
+ INIT_LIST_HEAD(&patch->obj_list);
patch->kobj_added = false;
patch->enabled = false;
patch->forced = false;
INIT_WORK(&patch->free_work, klp_free_patch_work_fn);
init_completion(&patch->finish);
- klp_for_each_object(patch, obj) {
+ klp_for_each_object_static(patch, obj) {
if (!obj->funcs)
return -EINVAL;
+ INIT_LIST_HEAD(&obj->func_list);
obj->kobj_added = false;
+ list_add_tail(&obj->node, &patch->obj_list);
- klp_for_each_func(obj, func)
+ klp_for_each_func_static(obj, func) {
func->kobj_added = false;
+ list_add_tail(&func->node, &obj->func_list);
+ }
}
if (!try_module_get(patch->mod))