ALSA: usb-audio: add support for Akai MPD16

[safe/jmp/linux-2.6] / kernel / pid_namespace.c

diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 495d5de..a5aff94 100644 (file)
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -13,6 +13,7 @@
 #include <linux/syscalls.h>
 #include <linux/err.h>
 #include <linux/acct.h>
+#include <linux/slab.h>
 
 #define BITS_PER_PAGE          (PAGE_SIZE*8)
 
@@ -116,23 +117,11 @@ static void destroy_pid_namespace(struct pid_namespace *ns)
 
 struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *old_ns)
 {
-       struct pid_namespace *new_ns;
-
-       BUG_ON(!old_ns);
-       new_ns = get_pid_ns(old_ns);
        if (!(flags & CLONE_NEWPID))
-               goto out;
-
-       new_ns = ERR_PTR(-EINVAL);
-       if (flags & CLONE_THREAD)
-               goto out_put;
-
-       new_ns = create_pid_namespace(old_ns);
-
-out_put:
-       put_pid_ns(old_ns);
-out:
-       return new_ns;
+               return get_pid_ns(old_ns);
+       if (flags & (CLONE_THREAD|CLONE_PARENT))
+               return ERR_PTR(-EINVAL);
+       return create_pid_namespace(old_ns);
 }
 
 void free_pid_ns(struct kref *kref)
@@ -173,13 +162,12 @@ void zap_pid_ns_processes(struct pid_namespace *pid_ns)
                rcu_read_lock();
 
                /*
-                * Use force_sig() since it clears SIGNAL_UNKILLABLE ensuring
-                * any nested-container's init processes don't ignore the
-                * signal
+                * Any nested-container's init processes won't ignore the
+                * SEND_SIG_NOINFO signal, see send_signal()->si_fromuser().
                 */
                task = pid_task(find_vpid(nr), PIDTYPE_PID);
                if (task)
-                       force_sig(SIGKILL, task);
+                       send_sig_info(SIGKILL, SEND_SIG_NOINFO, task);
 
                rcu_read_unlock();