powerpc/book3e: Move doorbell_exception from traps.c to dbell.c

... where it belongs

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 21 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/dbell.c b/arch/powerpc/kernel/dbell.c
index 1493734cd871..e3a717704fd6 100644
--- a/arch/powerpc/kernel/dbell.c
+++ b/arch/powerpc/kernel/dbell.c
@@ -41,4 +41,24 @@ void smp_dbell_message_pass(int target, int msg)
                 ppc_msgsnd(PPC_DBELL, PPC_DBELL_MSG_BRDCAST, 0);
         }
 }
-#endif
+
+void doorbell_exception(struct pt_regs *regs)
+{
+        int cpu = smp_processor_id();
+        int msg;
+
+        if (num_online_cpus() < 2)
+                return;
+
+        for (msg = 0; msg < 4; msg++)
+                if (test_and_clear_bit(msg, &dbell_smp_message[cpu]))
+                        smp_message_recv(msg);
+}
+
+#else /* CONFIG_SMP */
+void doorbell_exception(struct pt_regs *regs)
+{
+        printk(KERN_WARNING "Received doorbell on non-smp system\n");
+}
+#endif /* CONFIG_SMP */
+