linux-kernel - [PATCH] clocksource: Make CLOCKSOURCE

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Message-Id: <20071022.235458.111209400.anemo@mba.ocn.ne.jp>
Date:	Mon, 22 Oct 2007 23:54:58 +0900 (JST)
From:	Atsushi Nemoto <anemo@....ocn.ne.jp>
To:	linux-kernel@...r.kernel.org
Cc:	John Stultz <johnstul@...ibm.com>, akpm@...ux-foundation.org
Subject: [PATCH] clocksource: Make CLOCKSOURCE_MASK bullet-proof

Signed-off-by: Atsushi Nemoto <anemo@....ocn.ne.jp>
---
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index 107787a..07b4215 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -103,7 +103,7 @@ struct clocksource {
 #define CLOCK_SOURCE_VALID_FOR_HRES		0x20
 
 /* simplify initialization of mask field */
-#define CLOCKSOURCE_MASK(bits) (cycle_t)(bits<64 ? ((1ULL<<bits)-1) : -1)
+#define CLOCKSOURCE_MASK(bits) (cycle_t)((bits) < 64 ? ((1ULL<<(bits))-1) : -1)
 
 /**
  * clocksource_khz2mult - calculates mult from khz and shift

-
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