linux-kernel - Re: [PATCH] sched: Make nr_uninterruptible count a signed value

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Message-ID: <1336643166.2527.86.camel@twins>
Date:	Thu, 10 May 2012 11:46:06 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Michael Wang <wangyun@...ux.vnet.ibm.com>
Cc:	Diwakar Tundlam <dtundlam@...dia.com>,
	'Ingo Molnar' <mingo@...nel.org>,
	'David Rientjes' <rientjes@...gle.com>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	Peter De Schrijver <pdeschrijver@...dia.com>
Subject: Re: [PATCH] sched: Make nr_uninterruptible count a signed value

Or something like the below.. I recently changed nr_running to int (see
c82513e51) so P(nr_running) would also benefit.

---
 kernel/sched/debug.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 31e4f61..954fabf 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -260,8 +260,14 @@ static void print_cpu(struct seq_file *m, int cpu)
 	SEQ_printf(m, "\ncpu#%d\n", cpu);
 #endif
 
-#define P(x) \
-	SEQ_printf(m, "  .%-30s: %Ld\n", #x, (long long)(rq->x))
+#define P(x)								\
+do {									\
+	if (sizeof(rq->x) == 4)						\
+		SEQ_printf(m, "  .%-30s: %ld\n", #x, (long)(rq->x));	\
+	else								\
+		SEQ_printf(m, "  .%-30s: %Ld\n", #x, (long long)(rq->x));\
+} while (0)
+		
 #define PN(x) \
 	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
 

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