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

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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>
This commit is contained in:
Manfred Spraul 2008-07-25 01:48:04 -07:00 • committed by Linus Torvalds
parent 00c2bf85d8
commit 4daa28f6d8
2 changed files with 93 additions and 78 deletions
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12
include/linux/sem.h
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@ -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 {