linux-kernel - [PATCH 11/79] [PATCH] always enable irqs when entering idle

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Date:	Wed, 19 Mar 2008 14:25:06 -0300
From:	Glauber de Oliveira Costa <gcosta@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, tglx@...utronix.de, mingo@...e.hu,
	ak@...e.de, Glauber Costa <gcosta@...hat.com>
Subject: [PATCH 11/79] [PATCH] always enable irqs when entering idle

From: Glauber Costa <gcosta@...hat.com>

This matches x86_64 behaviour, which is a superior one IMHO

Signed-off-by: Glauber Costa <gcosta@...hat.com>
---
 arch/x86/kernel/process_32.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index ec05fb7..08c41ed 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -127,6 +127,7 @@ void default_idle(void)
 		local_irq_enable();
 		current_thread_info()->status |= TS_POLLING;
 	} else {
+		local_irq_enable();
 		/* loop is done by the caller */
 		cpu_relax();
 	}
@@ -142,6 +143,7 @@ EXPORT_SYMBOL(default_idle);
  */
 static void poll_idle(void)
 {
+	local_irq_enable();
 	cpu_relax();
 }
 
@@ -248,8 +250,11 @@ void mwait_idle_with_hints(unsigned long ax, unsigned long cx)
 		__monitor((void *)&current_thread_info()->flags, 0, 0);
 		smp_mb();
 		if (!need_resched())
-			__mwait(ax, cx);
-	}
+			__sti_mwait(ax, cx);
+		else
+			local_irq_enable();
+	} else
+		local_irq_enable();
 }
 
 /* Default MONITOR/MWAIT with no hints, used for default C1 state */
-- 
1.5.0.6

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