3 files changed, 9 insertions, 5 deletions

diff --git a/kernel/futex.c b/kernel/futex.c
index 5872e3507f35..5e71a6bf6f6b 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -270,7 +270,13 @@ static void wake_futex(struct futex_q *q)
         /*
          * The waiting task can free the futex_q as soon as this is written,
          * without taking any locks.  This must come last.
+         *
+         * A memory barrier is required here to prevent the following store
+         * to lock_ptr from getting ahead of the wakeup. Clearing the lock
+         * at the end of wake_up_all() does not prevent this store from
+         * moving.
          */
+        wmb();
         q->lock_ptr = NULL;
 }
 
diff --git a/kernel/params.c b/kernel/params.c
index 47ba69547945..c76ad25e6a21 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -619,7 +619,7 @@ static void __init param_sysfs_builtin(void)
 
 
 /* module-related sysfs stuff */
-#ifdef CONFIG_MODULES
+#ifdef CONFIG_SYSFS
 
 #define to_module_attr(n) container_of(n, struct module_attribute, attr);
 #define to_module_kobject(n) container_of(n, struct module_kobject, kobj);
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 9990e10192e8..e5102ea6e104 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -2201,14 +2201,12 @@ int sysctl_string(ctl_table *table, int __user *name, int nlen,
                 if (get_user(len, oldlenp))
                         return -EFAULT;
                 if (len) {
-                        l = strlen(table->data);
+                        l = strlen(table->data)+1;
                         if (len > l) len = l;
                         if (len >= table->maxlen)
                                 len = table->maxlen;
                         if(copy_to_user(oldval, table->data, len))
                                 return -EFAULT;
-                        if(put_user(0, ((char __user *) oldval) + len))
-                                return -EFAULT;
                         if(put_user(len, oldlenp))
                                 return -EFAULT;
                 }
@@ -2223,7 +2221,7 @@ int sysctl_string(ctl_table *table, int __user *name, int nlen,
                         len--;
                 ((char *) table->data)[len] = 0;
         }
-        return 0;
+        return 1;
 }
 
 /*