From: Gregory Haskins <ghaskins@novell.com>
Date: Wed, 4 Jun 2008 19:04:10 +0000 (-0400)
Subject: sched: fix cpupri priocount
X-Git-Tag: v2.6.27-rc1~1105^2~62
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=709d4b0c60f990bccf3e10ba7c6da407ad65c97f;p=linux-2.6

sched: fix cpupri priocount

A rounding error was pointed out by Peter Zijlstra which would result
in the structure holding priorities to be off by one.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/kernel/sched_cpupri.h b/kernel/sched_cpupri.h
index 0b6a3d110f..6b38355e26 100644
--- a/kernel/sched_cpupri.h
+++ b/kernel/sched_cpupri.h
@@ -4,7 +4,7 @@
 #include <linux/sched.h>
 
 #define CPUPRI_NR_PRIORITIES 2+MAX_RT_PRIO
-#define CPUPRI_NR_PRI_WORDS CPUPRI_NR_PRIORITIES/BITS_PER_LONG
+#define CPUPRI_NR_PRI_WORDS (CPUPRI_NR_PRIORITIES + BITS_PER_LONG/2)/BITS_PER_LONG
 
 #define CPUPRI_INVALID -1
 #define CPUPRI_IDLE     0