1 files changed, 15 insertions, 15 deletions

diff --git a/include/linux/sem.h b/include/linux/sem.h
index c8eaad9e4b72..1b191c176bcd 100644
--- a/include/linux/sem.h
+++ b/include/linux/sem.h
@@ -78,6 +78,7 @@ struct  seminfo {
 
 #ifdef __KERNEL__
 #include <asm/atomic.h>
+#include <linux/rcupdate.h>
 
 struct task_struct;
 
@@ -93,23 +94,19 @@ struct sem_array {
         time_t                  sem_otime;      /* last semop time */
         time_t                  sem_ctime;      /* last change time */
         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        sem_pending;    /* pending operations to be processed */
+        struct list_head        list_id;        /* undo requests on this array */
         unsigned long           sem_nsems;      /* no. of semaphores in array */
 };
 
 /* One queue for each sleeping process in the system. */
 struct sem_queue {
-        struct sem_queue *      next;    /* next entry in the queue */
-        struct sem_queue **     prev;    /* previous entry in the queue, *(q->prev) == q */
-        struct task_struct*     sleeper; /* this process */
-        struct sem_undo *       undo;    /* undo structure */
+        struct list_head        list;    /* queue of pending operations */
+        struct task_struct      *sleeper; /* this process */
+        struct sem_undo         *undo;   /* undo structure */
         int                     pid;     /* process id of requesting process */
         int                     status;  /* completion status of operation */
-        struct sem_array *      sma;     /* semaphore array for operations */
-        int                     id;      /* internal sem id */
-        struct sembuf *         sops;    /* array of pending operations */
+        struct sembuf           *sops;   /* array of pending operations */
         int                     nsops;   /* number of operations */
         int                     alter;   /* does the operation alter the array? */
 };
@@ -118,8 +115,11 @@ 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. */
+                                                /* rcu protected */
+        struct rcu_head         rcu;            /* rcu struct for sem_undo() */
+        struct sem_undo_list    *ulp;           /* sem_undo_list for the 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 {