linux-kernel - [PATCH 4/10] smpboot: use safe_apic_wait_icr_idle

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Message-Id: <1177500073.17974.21.camel@sebastian.intellilink.co.jp>
Date:	Wed, 25 Apr 2007 20:21:13 +0900
From:	Fernando Luis Vázquez Cao 
	<fernando@....ntt.co.jp>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	horms@...ge.net.au, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, ak@...e.de, vgoyal@...ibm.com,
	mbligh@...gle.com, Keith Owens <kaos@....com.au>,
	akpm@...ux-foundation.org
Subject: [PATCH 4/10] smpboot: use safe_apic_wait_icr_idle - x86_64

The functionality provided by the new safe_apic_wait_icr_idle is being
open-coded all over "kernel/smpboot.c". Use safe_apic_wait_icr_idle
instead to consolidate code and ease maintenance.

Signed-off-by: Fernando Luis Vazquez Cao <fernando@....ntt.co.jp>
---

diff -urNp linux-2.6.21-rc7-orig/arch/x86_64/kernel/smpboot.c linux-2.6.21-rc7/arch/x86_64/kernel/smpboot.c
--- linux-2.6.21-rc7-orig/arch/x86_64/kernel/smpboot.c	2007-04-18 15:27:48.000000000 +0900
+++ linux-2.6.21-rc7/arch/x86_64/kernel/smpboot.c	2007-04-18 15:52:08.000000000 +0900
@@ -430,8 +430,8 @@ static void inquire_remote_apic(int apic
  */
 static int __cpuinit wakeup_secondary_via_INIT(int phys_apicid, unsigned int start_rip)
 {
-	unsigned long send_status = 0, accept_status = 0;
-	int maxlvt, timeout, num_starts, j;
+	unsigned long send_status, accept_status = 0;
+	int maxlvt, num_starts, j;
 
 	Dprintk("Asserting INIT.\n");
 
@@ -447,12 +447,7 @@ static int __cpuinit wakeup_secondary_vi
 				| APIC_DM_INIT);
 
 	Dprintk("Waiting for send to finish...\n");
-	timeout = 0;
-	do {
-		Dprintk("+");
-		udelay(100);
-		send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
-	} while (send_status && (timeout++ < 1000));
+	send_status = safe_apic_wait_icr_idle();
 
 	mdelay(10);
 
@@ -465,12 +460,7 @@ static int __cpuinit wakeup_secondary_vi
 	apic_write(APIC_ICR, APIC_INT_LEVELTRIG | APIC_DM_INIT);
 
 	Dprintk("Waiting for send to finish...\n");
-	timeout = 0;
-	do {
-		Dprintk("+");
-		udelay(100);
-		send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
-	} while (send_status && (timeout++ < 1000));
+	send_status = safe_apic_wait_icr_idle();
 
 	mb();
 	atomic_set(&init_deasserted, 1);
@@ -509,12 +499,7 @@ static int __cpuinit wakeup_secondary_vi
 		Dprintk("Startup point 1.\n");
 
 		Dprintk("Waiting for send to finish...\n");
-		timeout = 0;
-		do {
-			Dprintk("+");
-			udelay(100);
-			send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
-		} while (send_status && (timeout++ < 1000));
+		send_status = safe_apic_wait_icr_idle();
 
 		/*
 		 * Give the other CPU some time to accept the IPI.


-
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