linux-kernel - [patch] BFS 421: confine for_each

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Date:	Wed, 6 Jun 2012 21:23:08 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>,
	Hillf Danton <dhillf@...il.com>
Subject: [patch] BFS 421: confine for_each_domain to SMP

Lets trap the insane build.


--- a/kernel/sched/bfs.c	Wed Jun  6 20:56:22 2012
+++ b/kernel/sched/bfs.c	Wed Jun  6 21:01:00 2012
@@ -324,7 +324,6 @@ int __weak arch_sd_sibling_asym_packing(
 {
        return 0*SD_ASYM_PACKING;
 }
-#endif

 #define rcu_dereference_check_sched_domain(p) \
 	rcu_dereference_check((p), \
@@ -339,6 +338,9 @@ int __weak arch_sd_sibling_asym_packing(
  */
 #define for_each_domain(cpu, __sd) \
 	for (__sd = rcu_dereference_check_sched_domain(cpu_rq(cpu)->sd);
__sd; __sd = __sd->parent)
+#else
+#define for_each_domain(cpu, __sd)	BUILD_BUG()
+#endif

 static inline void update_rq_clock(struct rq *rq);

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