xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Expand CONFIG_DEBUG_LIST to several other list operations

Browse Source 
When list debugging is enabled, we aim to readably show list corruption
errors, and the basic list_add/list_del operations end up having extra
debugging code in them to do some basic validation of the list entries.

However, "list_del_init()" and "list_move[_tail]()" ended up avoiding
the debug code due to how they were written. This fixes that.

So the _next_ time we have list_move() problems with stale list entries,
we'll hopefully have an easier time finding them..

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds
2011-02-18 11:32:28 -08:00
parent 2a324ce7b7
commit 3c18d4de86
2 changed files with 35 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
include/linux/list.h
View File

@@ -96,6 +96,11 @@ static inline void __list_del(struct list_head * prev, struct list_head * next)
* in an undefined state.
*/
#ifndef CONFIG_DEBUG_LIST
static inline void __list_del_entry(struct list_head *entry)
{
__list_del(entry->prev, entry->next);
}
static inline void list_del(struct list_head *entry)
{
__list_del(entry->prev, entry->next);
@@ -103,6 +108,7 @@ static inline void list_del(struct list_head *entry)
entry->prev = LIST_POISON2;
}
#else
extern void __list_del_entry(struct list_head *entry);
extern void list_del(struct list_head *entry);
#endif
@@ -135,7 +141,7 @@ static inline void list_replace_init(struct list_head *old,
*/
static inline void list_del_init(struct list_head *entry)
{
__list_del(entry->prev, entry->next);
__list_del_entry(entry);
INIT_LIST_HEAD(entry);
}
@@ -146,7 +152,7 @@ static inline void list_del_init(struct list_head *entry)
*/
static inline void list_move(struct list_head *list, struct list_head *head)
{
__list_del(list->prev, list->next);
__list_del_entry(list);
list_add(list, head);
}
@@ -158,7 +164,7 @@ static inline void list_move(struct list_head *list, struct list_head *head)
static inline void list_move_tail(struct list_head *list,
struct list_head *head)
{
__list_del(list->prev, list->next);
__list_del_entry(list);
list_add_tail(list, head);
}