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

[linux-2.6] / include / linux / sem.h

diff --git a/include/linux/sem.h b/include/linux/sem.h
index 3c1f1120fe8846de2ef1f9a3ec2d4cf47171f8b0..6a1af1b49a13f8269e5ac89e46d462fe398594ef 100644 (file)
--- a/include/linux/sem.h
+++ b/include/linux/sem.h
@@ -2,7 +2,6 @@
 #define _LINUX_SEM_H
 
 #include <linux/ipc.h>
-#include <asm/atomic.h>
 
 /* semop flags */
 #define SEM_UNDO        0x1000  /* undo the operation on exit */
@@ -78,6 +77,7 @@ struct  seminfo {
 #define SEMUSZ  20             /* sizeof struct sem_undo */
 
 #ifdef __KERNEL__
+#include <asm/atomic.h>
 
 struct task_struct;
 
@@ -90,13 +90,12 @@ struct sem {
 /* One sem_array data structure for each set of semaphores in the system. */
 struct sem_array {
        struct kern_ipc_perm    sem_perm;       /* permissions .. see ipc.h */
-       int                     sem_id;
        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        list_id;        /* undo requests on this array */
        unsigned long           sem_nsems;      /* no. of semaphores in array */
 };
 
@@ -119,8 +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 */
 };
@@ -129,9 +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 {