lists: add "const" qualifier to first arg of list_splice() operations

Since neither the list_splice() nor __list_splice() routines modify their
first argument, might as well declare them "const".

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/include/linux/list.h b/include/linux/list.h
index b4a939b6b625..7627508f1b74 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -328,7 +328,7 @@ static inline int list_is_singular(const struct list_head *head)
         return !list_empty(head) && (head->next == head->prev);
 }
 
-static inline void __list_splice(struct list_head *list,
+static inline void __list_splice(const struct list_head *list,
                                  struct list_head *head)
 {
         struct list_head *first = list->next;
@@ -347,7 +347,8 @@ static inline void __list_splice(struct list_head *list,
  * @list: the new list to add.
  * @head: the place to add it in the first list.
  */
-static inline void list_splice(struct list_head *list, struct list_head *head)
+static inline void list_splice(const struct list_head *list,
+                                struct list_head *head)
 {
         if (!list_empty(list))
                 __list_splice(list, head);