linux-kernel - [PATCH] acpi_unlazy

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Message-ID: <20080324212410.GB6783@linux-os.sc.intel.com>
Date:	Mon, 24 Mar 2008 14:24:10 -0700
From:	Venki Pallipadi <venkatesh.pallipadi@...el.com>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH] acpi_unlazy_tlb only on C3 entry



Earlier patch here
http://ussg.iu.edu/hypermail/linux/kernel/0712.2/1451.html
was intending to add acpi_unlazy_tlb() to acpi_idle_enter_bm() routine which is
used for C3 entry. But, some where along the way the call got added to
acpi_idle_enter_simple() (which is C2 entry routine), probably due to identical
context in that function. Move it back to acpi_idle_enter_bm().

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>

---
 drivers/acpi/processor_idle.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-2.6-x86.git/drivers/acpi/processor_idle.c
===================================================================
--- linux-2.6-x86.git.orig/drivers/acpi/processor_idle.c	2008-03-21 08:28:47.000000000 -0700
+++ linux-2.6-x86.git/drivers/acpi/processor_idle.c	2008-03-24 06:43:01.000000000 -0700
@@ -1487,7 +1487,6 @@ static int acpi_idle_enter_simple(struct
 		return 0;
 	}
 
-	acpi_unlazy_tlb(smp_processor_id());
 	/*
 	 * Must be done before busmaster disable as we might need to
 	 * access HPET !
@@ -1577,6 +1576,8 @@ static int acpi_idle_enter_bm(struct cpu
 		return 0;
 	}
 
+	acpi_unlazy_tlb(smp_processor_id());
+
 	/* Tell the scheduler that we are going deep-idle: */
 	sched_clock_idle_sleep_event();
 	/*
--
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