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[PATCH 5/5] MIPS/Perf-events: Use unsigned delta for right shift in even

To: ralf@linux-mips.org, a.p.zijlstra@chello.nl, fweisbec@gmail.com, will.deacon@arm.com
Subject: [PATCH 5/5] MIPS/Perf-events: Use unsigned delta for right shift in event update
From: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
Date: Thu, 18 Nov 2010 14:56:41 +0800
Cc: linux-mips@linux-mips.org, linux-kernel@vger.kernel.org, wuzhangjin@gmail.com, paulus@samba.org, mingo@elte.hu, acme@redhat.com, dengcheng.zhu@gmail.com
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Leverage the commit for ARM by Will Deacon:

446a5a8b1eb91a6990e5c8fe29f14e7a95b69132
        ARM: 6205/1: perf: ensure counter delta is treated as unsigned

Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
---
 arch/mips/kernel/perf_event.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/mips/kernel/perf_event.c b/arch/mips/kernel/perf_event.c
index 345232a..0f1cdf5 100644
--- a/arch/mips/kernel/perf_event.c
+++ b/arch/mips/kernel/perf_event.c
@@ -169,7 +169,7 @@ static void mipspmu_event_update(struct perf_event *event,
        unsigned long flags;
        int shift = 64 - TOTAL_BITS;
        s64 prev_raw_count, new_raw_count;
-       s64 delta;
+       u64 delta;
 
 again:
        prev_raw_count = local64_read(&hwc->prev_count);
-- 
1.7.1


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