include/asm-x86/irq_64.h: checkpatch cleanups - formatting only

[sfrench/cifs-2.6.git] / ipc / shm.c

diff --git a/ipc/shm.c b/ipc/shm.c
index 65c3a294aba5cf265823f3d6f369b7b206643d22..cc63fae02f064d298689279a46599a8159b01df1 100644 (file)
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -38,6 +38,7 @@
 #include <linux/rwsem.h>
 #include <linux/nsproxy.h>
 #include <linux/mount.h>
+#include <linux/ipc_namespace.h>
 
 #include <asm/uaccess.h>
 
@@ -55,9 +56,7 @@ struct shm_file_data {
 static const struct file_operations shm_file_operations;
 static struct vm_operations_struct shm_vm_ops;
 
-static struct ipc_ids init_shm_ids;
-
-#define shm_ids(ns)    (*((ns)->ids[IPC_SHM_IDS]))
+#define shm_ids(ns)    ((ns)->ids[IPC_SHM_IDS])
 
 #define shm_unlock(shp)                        \
        ipc_unlock(&(shp)->shm_perm)
@@ -71,22 +70,24 @@ static void shm_destroy (struct ipc_namespace *ns, struct shmid_kernel *shp);
 static int sysvipc_shm_proc_show(struct seq_file *s, void *it);
 #endif
 
-static void __shm_init_ns(struct ipc_namespace *ns, struct ipc_ids *ids)
+void shm_init_ns(struct ipc_namespace *ns)
 {
-       ns->ids[IPC_SHM_IDS] = ids;
        ns->shm_ctlmax = SHMMAX;
        ns->shm_ctlall = SHMALL;
        ns->shm_ctlmni = SHMMNI;
        ns->shm_tot = 0;
-       ipc_init_ids(ids);
+       ipc_init_ids(&ns->ids[IPC_SHM_IDS]);
 }
 
 /*
  * Called with shm_ids.rw_mutex (writer) and the shp structure locked.
  * Only shm_ids.rw_mutex remains locked on exit.
  */
-static void do_shm_rmid(struct ipc_namespace *ns, struct shmid_kernel *shp)
+static void do_shm_rmid(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp)
 {
+       struct shmid_kernel *shp;
+       shp = container_of(ipcp, struct shmid_kernel, shm_perm);
+
        if (shp->shm_nattch){
                shp->shm_perm.mode |= SHM_DEST;
                /* Do not find it any more */
@@ -96,47 +97,16 @@ static void do_shm_rmid(struct ipc_namespace *ns, struct shmid_kernel *shp)
                shm_destroy(ns, shp);
 }
 
-int shm_init_ns(struct ipc_namespace *ns)
-{
-       struct ipc_ids *ids;
-
-       ids = kmalloc(sizeof(struct ipc_ids), GFP_KERNEL);
-       if (ids == NULL)
-               return -ENOMEM;
-
-       __shm_init_ns(ns, ids);
-       return 0;
-}
-
+#ifdef CONFIG_IPC_NS
 void shm_exit_ns(struct ipc_namespace *ns)
 {
-       struct shmid_kernel *shp;
-       struct kern_ipc_perm *perm;
-       int next_id;
-       int total, in_use;
-
-       down_write(&shm_ids(ns).rw_mutex);
-
-       in_use = shm_ids(ns).in_use;
-
-       for (total = 0, next_id = 0; total < in_use; next_id++) {
-               perm = idr_find(&shm_ids(ns).ipcs_idr, next_id);
-               if (perm == NULL)
-                       continue;
-               ipc_lock_by_ptr(perm);
-               shp = container_of(perm, struct shmid_kernel, shm_perm);
-               do_shm_rmid(ns, shp);
-               total++;
-       }
-       up_write(&shm_ids(ns).rw_mutex);
-
-       kfree(ns->ids[IPC_SHM_IDS]);
-       ns->ids[IPC_SHM_IDS] = NULL;
+       free_ipcs(ns, &shm_ids(ns), do_shm_rmid);
 }
+#endif
 
 void __init shm_init (void)
 {
-       __shm_init_ns(&init_ipc_ns, &init_shm_ids);
+       shm_init_ns(&init_ipc_ns);
        ipc_init_proc_interface("sysvipc/shm",
                                "       key      shmid perms       size  cpid  lpid nattch   uid   gid  cuid  cgid      atime      dtime      ctime\n",
                                IPC_SHM_IDS, sysvipc_shm_proc_show);
@@ -301,9 +271,10 @@ static struct mempolicy *shm_get_policy(struct vm_area_struct *vma,
 
        if (sfd->vm_ops->get_policy)
                pol = sfd->vm_ops->get_policy(vma, addr);
-       else if (vma->vm_policy)
+       else if (vma->vm_policy) {
                pol = vma->vm_policy;
-       else
+               mpol_get(pol);  /* get_vma_policy() expects this */
+       } else
                pol = current->mempolicy;
        return pol;
 }
@@ -847,7 +818,7 @@ asmlinkage long sys_shmctl (int shmid, int cmd, struct shmid_ds __user *buf)
                if (err)
                        goto out_unlock_up;
 
-               do_shm_rmid(ns, shp);
+               do_shm_rmid(ns, &shp->shm_perm);
                up_write(&shm_ids(ns).rw_mutex);
                goto out;
        }