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Message-ID: <1376446800-3778-1-git-send-email-li.wang@windriver.com>
Date: Wed, 14 Aug 2013 10:20:00 +0800
From: Li Wang <li.wang@...driver.com>
To: <tglx@...utronix.de>, <mingo@...hat.com>, <hpa@...or.com>,
<x86@...nel.org>, <linux-kernel@...r.kernel.org>
CC: <li.wang@...driver.com>
Subject: [PATCH] x86: remove redundant local_irq_enable() after cpuidle_idle_call()
When cpuidle_idle_call() return 0, it shows that linux system is using
idle framwork driver. Now, local irq has already been enabled in
cpuidle_idle_call(). So, it need not enable local irq again, when return 0.
The code is introduced by commit:
97a5b81fa4d3a11dcdf224befc577f2e0abadc0b ("x86: Fix idle consolidation fallout")
In that defect, it does not use idle framework driver, just call amd_e400_idle().
That problem is that amd_e400_idle() does not enable irq.
Signed-off-by: Li Wang <li.wang@...driver.com>
---
arch/x86/kernel/process.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 83369e5..cb55ee4 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -300,8 +300,6 @@ void arch_cpu_idle(void)
{
if (cpuidle_idle_call())
x86_idle();
- else
- local_irq_enable();
}
/*
--
1.7.9.5
--
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