From 9a69abf80edf2ea0dac058cab156879d29362788 Mon Sep 17 00:00:00 2001 From: Benjamin Poirier Date: Tue, 16 Apr 2013 10:07:23 -0400 Subject: menuconfig: Add "breadcrumbs" navigation aid Displays a trail of the menu entries used to get to the current menu. Signed-off-by: Benjamin Poirier Tested-by: "Yann E. MORIN" [yann.morin.1998@free.fr: small, trivial code re-ordering] Signed-off-by: "Yann E. MORIN" --- scripts/kconfig/list.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'scripts/kconfig/list.h') diff --git a/scripts/kconfig/list.h b/scripts/kconfig/list.h index b87206cc92f4..ea1d58119d20 100644 --- a/scripts/kconfig/list.h +++ b/scripts/kconfig/list.h @@ -101,4 +101,31 @@ static inline void list_add_tail(struct list_head *_new, struct list_head *head) __list_add(_new, head->prev, head); } +/* + * Delete a list entry by making the prev/next entries + * point to each other. + * + * This is only for internal list manipulation where we know + * the prev/next entries already! + */ +static inline void __list_del(struct list_head *prev, struct list_head *next) +{ + next->prev = prev; + prev->next = next; +} + +#define LIST_POISON1 ((void *) 0x00100100) +#define LIST_POISON2 ((void *) 0x00200200) +/** + * list_del - deletes entry from list. + * @entry: the element to delete from the list. + * Note: list_empty() on entry does not return true after this, the entry is + * in an undefined state. + */ +static inline void list_del(struct list_head *entry) +{ + __list_del(entry->prev, entry->next); + entry->next = LIST_POISON1; + entry->prev = LIST_POISON2; +} #endif -- cgit v1.2.3-59-g8ed1b