From: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
To: ralf@linux-mips.org, a.p.zijlstra@chello.nl, fweisbec@gmail.com,
will.deacon@arm.com
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
Subject: [PATCH v2 5/5] MIPS/Perf-events: Use unsigned delta for right shift in event update
Date: Fri, 26 Nov 2010 11:05:07 +0800 [thread overview]
Message-ID: <1290740707-32586-6-git-send-email-dengcheng.zhu@gmail.com> (raw)
In-Reply-To: <1290740707-32586-1-git-send-email-dengcheng.zhu@gmail.com>
Leverage the commit for ARM by Will Deacon:
446a5a8b1eb91a6990e5c8fe29f14e7a95b69132
ARM: 6205/1: perf: ensure counter delta is treated as unsigned
Acked-by: Will Deacon <will.deacon@arm.com>
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 8f7d2f8..a824485 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
prev parent reply other threads:[~2010-11-26 3:04 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-26 3:05 [PATCH v2 0/5] MIPS/Perf-events: Sync with mainline upper layer (v2) Deng-Cheng Zhu
2010-11-26 3:05 ` [PATCH v2 1/5] MIPS/Perf-events: Work with irq_work Deng-Cheng Zhu
2010-11-26 12:23 ` Matt Fleming
2010-11-26 13:23 ` Sergei Shtylyov
2010-11-26 3:05 ` [PATCH v2 2/5] MIPS/Perf-events: Work with the new PMU interface Deng-Cheng Zhu
2010-11-26 3:05 ` [PATCH v2 3/5] MIPS/Perf-events: Fix event check in validate_event() Deng-Cheng Zhu
2010-11-26 9:37 ` Will Deacon
2010-11-26 3:05 ` [PATCH v2 4/5] MIPS/Perf-events: Work with the new callchain interface Deng-Cheng Zhu
2010-11-26 3:05 ` Deng-Cheng Zhu [this message]
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