4 files changed, 43 insertions, 16 deletions

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 358e77564e6f..fe00b3b983a8 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -2039,10 +2039,13 @@ int cgroupstats_build(struct cgroupstats *stats, struct dentry *dentry)
         struct cgroup *cgrp;
         struct cgroup_iter it;
         struct task_struct *tsk;
+
         /*
-         * Validate dentry by checking the superblock operations
+         * Validate dentry by checking the superblock operations,
+         * and make sure it's a directory.
          */
-        if (dentry->d_sb->s_op != &cgroup_ops)
+        if (dentry->d_sb->s_op != &cgroup_ops ||
+            !S_ISDIR(dentry->d_inode->i_mode))
                  goto err;
 
         ret = 0;
@@ -2472,10 +2475,7 @@ static int cgroup_rmdir(struct inode *unused_dir, struct dentry *dentry)
                 mutex_unlock(&cgroup_mutex);
                 return -EBUSY;
         }
-
-        parent = cgrp->parent;
-        root = cgrp->root;
-        sb = root->sb;
+        mutex_unlock(&cgroup_mutex);
 
         /*
          * Call pre_destroy handlers of subsys. Notify subsystems
@@ -2483,7 +2483,14 @@ static int cgroup_rmdir(struct inode *unused_dir, struct dentry *dentry)
          */
         cgroup_call_pre_destroy(cgrp);
 
-        if (cgroup_has_css_refs(cgrp)) {
+        mutex_lock(&cgroup_mutex);
+        parent = cgrp->parent;
+        root = cgrp->root;
+        sb = root->sb;
+
+        if (atomic_read(&cgrp->count)
+            || !list_empty(&cgrp->children)
+            || cgroup_has_css_refs(cgrp)) {
                 mutex_unlock(&cgroup_mutex);
                 return -EBUSY;
         }
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 81fc6791a296..da7ff6137f37 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -36,6 +36,7 @@
 #include <linux/list.h>
 #include <linux/mempolicy.h>
 #include <linux/mm.h>
+#include <linux/memory.h>
 #include <linux/module.h>
 #include <linux/mount.h>
 #include <linux/namei.h>
@@ -2015,12 +2016,23 @@ static int cpuset_track_online_cpus(struct notifier_block *unused_nb,
  * Call this routine anytime after node_states[N_HIGH_MEMORY] changes.
  * See also the previous routine cpuset_track_online_cpus().
  */
-void cpuset_track_online_nodes(void)
+static int cpuset_track_online_nodes(struct notifier_block *self,
+                                unsigned long action, void *arg)
 {
         cgroup_lock();
-        top_cpuset.mems_allowed = node_states[N_HIGH_MEMORY];
-        scan_for_empty_cpusets(&top_cpuset);
+        switch (action) {
+        case MEM_ONLINE:
+                top_cpuset.mems_allowed = node_states[N_HIGH_MEMORY];
+                break;
+        case MEM_OFFLINE:
+                top_cpuset.mems_allowed = node_states[N_HIGH_MEMORY];
+                scan_for_empty_cpusets(&top_cpuset);
+                break;
+        default:
+                break;
+        }
         cgroup_unlock();
+        return NOTIFY_OK;
 }
 #endif
 
@@ -2036,6 +2048,7 @@ void __init cpuset_init_smp(void)
         top_cpuset.mems_allowed = node_states[N_HIGH_MEMORY];
 
         hotcpu_notifier(cpuset_track_online_cpus, 0);
+        hotplug_memory_notifier(cpuset_track_online_nodes, 10);
 }
 
 /**
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index 5072cf1685a2..7b8b0f21a5b1 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -304,17 +304,24 @@ int sprint_symbol(char *buffer, unsigned long address)
         char *modname;
         const char *name;
         unsigned long offset, size;
-        char namebuf[KSYM_NAME_LEN];
+        int len;
 
-        name = kallsyms_lookup(address, &size, &offset, &modname, namebuf);
+        name = kallsyms_lookup(address, &size, &offset, &modname, buffer);
         if (!name)
                 return sprintf(buffer, "0x%lx", address);
 
+        if (name != buffer)
+                strcpy(buffer, name);
+        len = strlen(buffer);
+        buffer += len;
+
         if (modname)
-                return sprintf(buffer, "%s+%#lx/%#lx [%s]", name, offset,
-                                size, modname);
+                len += sprintf(buffer, "+%#lx/%#lx [%s]",
+                                                offset, size, modname);
         else
-                return sprintf(buffer, "%s+%#lx/%#lx", name, offset, size);
+                len += sprintf(buffer, "+%#lx/%#lx", offset, size);
+
+        return len;
 }
 
 /* Look up a kernel symbol and print it to the kernel messages. */
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index a77b27b11b04..e14a23281707 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -31,7 +31,7 @@ cond_syscall(sys_socketpair);
 cond_syscall(sys_bind);
 cond_syscall(sys_listen);
 cond_syscall(sys_accept);
-cond_syscall(sys_paccept);
+cond_syscall(sys_accept4);
 cond_syscall(sys_connect);
 cond_syscall(sys_getsockname);
 cond_syscall(sys_getpeername);