futex: Fix compat_futex to be same as futex for REQUEUE_PI

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

diff --git a/kernel/relay.c b/kernel/relay.c
index 8f2179c..bc18854 100644 (file)
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -677,9 +677,7 @@ int relay_late_setup_files(struct rchan *chan,
         */
        for_each_online_cpu(i) {
                if (unlikely(!chan->buf[i])) {
-                       printk(KERN_ERR "relay_late_setup_files: CPU %u "
-                                       "has no buffer, it must have!\n", i);
-                       BUG();
+                       WARN_ONCE(1, KERN_ERR "CPU has no buffer!\n");
                        err = -EINVAL;
                        break;
                }
@@ -797,13 +795,15 @@ void relay_subbufs_consumed(struct rchan *chan,
        if (!chan)
                return;
 
-       if (cpu >= NR_CPUS || !chan->buf[cpu])
+       if (cpu >= NR_CPUS || !chan->buf[cpu] ||
+                                       subbufs_consumed > chan->n_subbufs)
                return;
 
        buf = chan->buf[cpu];
-       buf->subbufs_consumed += subbufs_consumed;
-       if (buf->subbufs_consumed > buf->subbufs_produced)
+       if (subbufs_consumed > buf->subbufs_produced - buf->subbufs_consumed)
                buf->subbufs_consumed = buf->subbufs_produced;
+       else
+               buf->subbufs_consumed += subbufs_consumed;
 }
 EXPORT_SYMBOL_GPL(relay_subbufs_consumed);