linux-kernel - [PATCH 3/6] staging: hv: Fixed the value of the 64bit-hole inside ring buffer

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Message-ID: <8AFC7968D54FB448A30D8F38F259C56223FD1D45@TK5EX14MBXC114.redmond.corp.microsoft.com>
Date:	Tue, 3 Aug 2010 17:31:57 +0000
From:	Hank Janssen <hjanssen@...rosoft.com>
To:	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	"'devel@...verdev.osuosl.org'" <devel@...verdev.osuosl.org>,
	"'virtualization@...ts.osdl.org'" <virtualization@...ts.osdl.org>
CC:	Haiyang Zhang <haiyangz@...rosoft.com>,
	"'gregkh@...e.de'" <gregkh@...e.de>
Subject: [PATCH 3/6] staging: hv: Fixed the value of the 64bit-hole inside
 ring buffer

From: Haiyang Zhang <haiyangz@...rosoft.com>

Fixed the value of the 64bit-hole inside ring buffer, this caused a problem on Hyper-V when running checked Windows builds.

Signed-off-by:Hank Janssen <hjanssen@...rosoft.com>
Signed-off-by:Haiyang Zhang <haiyangz@...rosoft.com>

---
 drivers/staging/hv/ring_buffer.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/hv/ring_buffer.c b/drivers/staging/hv/ring_buffer.c
index 66a4974..133f909 100644
--- a/drivers/staging/hv/ring_buffer.c
+++ b/drivers/staging/hv/ring_buffer.c
@@ -192,8 +192,7 @@ Description:
 static inline u64
 GetRingBufferIndices(RING_BUFFER_INFO *RingInfo)  {
-	return ((u64)RingInfo->RingBuffer->WriteIndex << 32)
-	|| RingInfo->RingBuffer->ReadIndex;
+	return (u64)RingInfo->RingBuffer->WriteIndex << 32;
 }
 
 
--
1.6.0.2

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