KVM: set_memory_region: Drop user_alloc from prepare/commit_memory_region()

[pandora-kernel.git] / ipc / util.c

diff --git a/ipc/util.c b/ipc/util.c
index 74e1d9c..464a8ab 100644 (file)
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -252,7 +252,7 @@ int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size)
 {
        kuid_t euid;
        kgid_t egid;
-       int id, err;
+       int id;
        int next_id = ids->next_id;
 
        if (size > IPCMNI)
@@ -261,17 +261,21 @@ int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size)
        if (ids->in_use >= size)
                return -ENOSPC;
 
+       idr_preload(GFP_KERNEL);
+
        spin_lock_init(&new->lock);
        new->deleted = 0;
        rcu_read_lock();
        spin_lock(&new->lock);
 
-       err = idr_get_new_above(&ids->ipcs_idr, new,
-                               (next_id < 0) ? 0 : ipcid_to_idx(next_id), &id);
-       if (err) {
+       id = idr_alloc(&ids->ipcs_idr, new,
+                      (next_id < 0) ? 0 : ipcid_to_idx(next_id), 0,
+                      GFP_NOWAIT);
+       idr_preload_end();
+       if (id < 0) {
                spin_unlock(&new->lock);
                rcu_read_unlock();
-               return err;
+               return id;
        }
 
        ids->in_use++;
@@ -307,19 +311,10 @@ static int ipcget_new(struct ipc_namespace *ns, struct ipc_ids *ids,
                struct ipc_ops *ops, struct ipc_params *params)
 {
        int err;
-retry:
-       err = idr_pre_get(&ids->ipcs_idr, GFP_KERNEL);
-
-       if (!err)
-               return -ENOMEM;
 
        down_write(&ids->rw_mutex);
        err = ops->getnew(ns, params);
        up_write(&ids->rw_mutex);
-
-       if (err == -EAGAIN)
-               goto retry;
-
        return err;
 }
 
@@ -376,8 +371,6 @@ static int ipcget_public(struct ipc_namespace *ns, struct ipc_ids *ids,
        struct kern_ipc_perm *ipcp;
        int flg = params->flg;
        int err;
-retry:
-       err = idr_pre_get(&ids->ipcs_idr, GFP_KERNEL);
 
        /*
         * Take the lock as a writer since we are potentially going to add
@@ -389,8 +382,6 @@ retry:
                /* key not used */
                if (!(flg & IPC_CREAT))
                        err = -ENOENT;
-               else if (!err)
-                       err = -ENOMEM;
                else
                        err = ops->getnew(ns, params);
        } else {
@@ -413,9 +404,6 @@ retry:
        }
        up_write(&ids->rw_mutex);
 
-       if (err == -EAGAIN)
-               goto retry;
-
        return err;
 }