linux-kernel - [PATCH for 2.4] x86_64: Fix missing delay when the TSC counter just overflowed

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Message-Id: <200609202143.k8KLhsxg007647@dhcp119.mvista.com>
Date:	Wed, 20 Sep 2006 14:43:54 -0700
From:	Toyo Abe <toyoa@...sta.com>
To:	Willy Tarreau <w@....eu>
Cc:	Andi Kleen <ak@...e.de>, linux-kernel@...r.kernel.org
Subject: [PATCH for 2.4] x86_64: Fix missing delay when the TSC counter just overflowed

I'd seen a problem that *delay functions return in too short delay.
It happens when the lower 32bit of TSC counter is overflowed.
This patch fixes the problem. This is back-port of Andi Kleen's
2.6 fix.

http://www.kernel.org/git/?p=linux/kernel/git/tglx/history.git;a=commit;h=6c51e28ffbbebf49437ec63ac4f9e385d60827e5

Signed-off-by: Toyo Abe <toyoa@...sta.com>

---

 arch/x86_64/lib/delay.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86_64/lib/delay.c b/arch/x86_64/lib/delay.c
index cc845d2..91345ee 100644
--- a/arch/x86_64/lib/delay.c
+++ b/arch/x86_64/lib/delay.c
@@ -19,7 +19,7 @@ #endif
 
 void __delay(unsigned long loops)
 {
-	unsigned long bclock, now;
+	unsigned bclock, now;
 	
 	rdtscl(bclock);
 	do
-
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