linux-kernel - [PATCH v2 5/5] MIPS/Perf-events: Use unsigned delta for right shift in event update

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1290740707-32586-6-git-send-email-dengcheng.zhu@gmail.com>
Date:	Fri, 26 Nov 2010 11:05:07 +0800
From:	Deng-Cheng Zhu <dengcheng.zhu@...il.com>
To:	ralf@...ux-mips.org, a.p.zijlstra@...llo.nl, fweisbec@...il.com,
	will.deacon@....com
Cc:	linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
	wuzhangjin@...il.com, paulus@...ba.org, mingo@...e.hu,
	acme@...hat.com, dengcheng.zhu@...il.com
Subject: [PATCH v2 5/5] MIPS/Perf-events: Use unsigned delta for right shift in event update

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@....com>
Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@...il.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

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/