From: dinggnu@gmail.com (Cong Ding)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] arm: kernel/perf_event_cpu.c: remove unnecessary null pointer dereference check
Date: Mon, 14 Jan 2013 17:40:55 +0000 [thread overview]
Message-ID: <20130114174055.GB917@gmail.com> (raw)
In-Reply-To: <1358183933-29160-1-git-send-email-dinggnu@gmail.com>
The NULL pointer check is not necessary. cpu_pmu_init() is called
after cpu_pmu has already been dereferenced by its caller:
cpu_pmu = pmu;
cpu_pmu->plat_device = pdev;
cpu_pmu_init(cpu_pmu);
Signed-off-by: Cong Ding <dinggnu@gmail.com>
---
arch/arm/kernel/perf_event_cpu.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/arm/kernel/perf_event_cpu.c b/arch/arm/kernel/perf_event_cpu.c
index efa5295..43496f6 100644
--- a/arch/arm/kernel/perf_event_cpu.c
+++ b/arch/arm/kernel/perf_event_cpu.c
@@ -147,7 +147,7 @@ static void cpu_pmu_init(struct arm_pmu *cpu_pmu)
cpu_pmu->free_irq = cpu_pmu_free_irq;
/* Ensure the PMU has sane values out of reset. */
- if (cpu_pmu && cpu_pmu->reset)
+ if (cpu_pmu->reset)
on_each_cpu(cpu_pmu->reset, cpu_pmu, 1);
}
--
1.7.4.5
WARNING: multiple messages have this Message-ID (diff)
From: Cong Ding <dinggnu@gmail.com>
To: Will Deacon <will.deacon@arm.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Paul Mackerras <paulus@samba.org>, Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
Russell King <linux@arm.linux.org.uk>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2] arm: kernel/perf_event_cpu.c: remove unnecessary null pointer dereference check
Date: Mon, 14 Jan 2013 17:40:55 +0000 [thread overview]
Message-ID: <20130114174055.GB917@gmail.com> (raw)
In-Reply-To: <1358183933-29160-1-git-send-email-dinggnu@gmail.com>
The NULL pointer check is not necessary. cpu_pmu_init() is called
after cpu_pmu has already been dereferenced by its caller:
cpu_pmu = pmu;
cpu_pmu->plat_device = pdev;
cpu_pmu_init(cpu_pmu);
Signed-off-by: Cong Ding <dinggnu@gmail.com>
---
arch/arm/kernel/perf_event_cpu.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/arm/kernel/perf_event_cpu.c b/arch/arm/kernel/perf_event_cpu.c
index efa5295..43496f6 100644
--- a/arch/arm/kernel/perf_event_cpu.c
+++ b/arch/arm/kernel/perf_event_cpu.c
@@ -147,7 +147,7 @@ static void cpu_pmu_init(struct arm_pmu *cpu_pmu)
cpu_pmu->free_irq = cpu_pmu_free_irq;
/* Ensure the PMU has sane values out of reset. */
- if (cpu_pmu && cpu_pmu->reset)
+ if (cpu_pmu->reset)
on_each_cpu(cpu_pmu->reset, cpu_pmu, 1);
}
--
1.7.4.5
next prev parent reply other threads:[~2013-01-14 17:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-14 17:18 [PATCH] arm: kernel/perf_event_cpu.c: fix error null pointer dereference check Cong Ding
2013-01-14 17:18 ` Cong Ding
2013-01-14 17:23 ` Russell King - ARM Linux
2013-01-14 17:23 ` Russell King - ARM Linux
2013-01-14 17:38 ` Cong Ding
2013-01-14 17:38 ` Cong Ding
2013-01-14 17:40 ` Will Deacon
2013-01-14 17:40 ` Will Deacon
2013-01-14 17:40 ` Cong Ding [this message]
2013-01-14 17:40 ` [PATCH v2] arm: kernel/perf_event_cpu.c: remove unnecessary " Cong Ding
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