ipc/sem.c: convert undo structures to struct list_head

The undo structures contain two linked lists, the attached patch replaces
them with generic struct list_head lists.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Nadia Derbey <Nadia.Derbey@bull.net>
Cc: Pierre Peiffer <peifferp@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/include/linux/sem.h b/include/linux/sem.h
index c8eaad9e4b72..6a1af1b49a13 100644
--- a/include/linux/sem.h
+++ b/include/linux/sem.h
@@ -95,7 +95,7 @@ struct sem_array {
         struct sem              *sem_base;      /* ptr to first semaphore in array */
         struct sem_queue        *sem_pending;   /* pending operations to be processed */
         struct sem_queue        **sem_pending_last; /* last pending operation */
-        struct sem_undo         *undo;          /* undo requests on this array */
+        struct list_head        list_id;        /* undo requests on this array */
         unsigned long           sem_nsems;      /* no. of semaphores in array */
 };
 
@@ -118,8 +118,8 @@ struct sem_queue {
  * when the process exits.
  */
 struct sem_undo {
-        struct sem_undo *       proc_next;      /* next entry on this process */
-        struct sem_undo *       id_next;        /* next entry on this semaphore set */
+        struct list_head        list_proc;      /* per-process list: all undos from one process */
+        struct list_head        list_id;        /* per semaphore array list: all undos for one array */
         int                     semid;          /* semaphore set identifier */
         short *                 semadj;         /* array of adjustments, one per semaphore */
 };
@@ -128,9 +128,9 @@ struct sem_undo {
  * that may be shared among all a CLONE_SYSVSEM task group.
  */ 
 struct sem_undo_list {
-        atomic_t        refcnt;
-        spinlock_t      lock;
-        struct sem_undo *proc_list;
+        atomic_t                refcnt;
+        spinlock_t              lock;
+        struct list_head        list_proc;
 };
 
 struct sysv_sem {