X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=ipc%2Fshm.c;h=e77ec698cf408c2344d302ac693814d44d411180;hb=13b3c3fa27f8f4ed306ce624f446fab000dd8ee4;hp=a726aebce7d7f9c679f468343aaf62a4354d805c;hpb=ecc8b655b38a880b578146895e0e1e2d477ca2c0;p=linux-2.6-omap-h63xx.git

diff --git a/ipc/shm.c b/ipc/shm.c
index a726aebce7d..e77ec698cf4 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -111,24 +111,9 @@ void __init shm_init (void)
 				IPC_SHM_IDS, sysvipc_shm_proc_show);
 }
 
-/*
- * shm_lock_(check_)down routines are called in the paths where the rw_mutex
- * is held to protect access to the idr tree.
- */
-static inline struct shmid_kernel *shm_lock_down(struct ipc_namespace *ns,
-						int id)
-{
-	struct kern_ipc_perm *ipcp = ipc_lock_down(&shm_ids(ns), id);
-
-	if (IS_ERR(ipcp))
-		return (struct shmid_kernel *)ipcp;
-
-	return container_of(ipcp, struct shmid_kernel, shm_perm);
-}
-
 /*
  * shm_lock_(check_) routines are called in the paths where the rw_mutex
- * is not held.
+ * is not necessarily held.
  */
 static inline struct shmid_kernel *shm_lock(struct ipc_namespace *ns, int id)
 {
@@ -211,7 +196,7 @@ static void shm_close(struct vm_area_struct *vma)
 
 	down_write(&shm_ids(ns).rw_mutex);
 	/* remove from the list of attaches of the shm segment */
-	shp = shm_lock_down(ns, sfd->id);
+	shp = shm_lock(ns, sfd->id);
 	BUG_ON(IS_ERR(shp));
 	shp->shm_lprid = task_tgid_vnr(current);
 	shp->shm_dtim = get_seconds();
@@ -932,7 +917,7 @@ invalid:
 
 out_nattch:
 	down_write(&shm_ids(ns).rw_mutex);
-	shp = shm_lock_down(ns, shmid);
+	shp = shm_lock(ns, shmid);
 	BUG_ON(IS_ERR(shp));
 	shp->shm_nattch--;
 	if(shp->shm_nattch == 0 &&