X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=kernel%2Frcutiny.c;h=bc845960c63a69adcf30f41c1aa785e15542bfee;hp=636af6d9c6e565ca6e6d7010941501901c8322b4;hb=f25e101926667bf6fcc8d672122d22cdd9e36b50;hpb=02f1ce35bed3ceb56868ec534591e15ffdcef879

diff --git a/kernel/rcutiny.c b/kernel/rcutiny.c
index 636af6d9c6e5..bc845960c63a 100644
--- a/kernel/rcutiny.c
+++ b/kernel/rcutiny.c
@@ -160,6 +160,11 @@ static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp)
 
 	/* Move the ready-to-invoke callbacks to a local list. */
 	local_irq_save(flags);
+	if (rcp->donetail == &rcp->rcucblist) {
+		/* No callbacks ready, so just leave. */
+		local_irq_restore(flags);
+		return;
+	}
 	RCU_TRACE(trace_rcu_batch_start(rcp->name, 0, -1));
 	list = rcp->rcucblist;
 	rcp->rcucblist = *rcp->donetail;