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Subject[PATCH] [9/34] x86_64: use safe_apic_wait_icr_idle in smpboot.c - x86_64
Date

From: Fernando Luis VazquezCao <fernando@oss.ntt.co.jp>

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@oss.ntt.co.jp>
Signed-off-by: Andi Kleen <ak@suse.de>

---

---
arch/x86_64/kernel/smpboot.c | 25 +++++--------------------
1 file changed, 5 insertions(+), 20 deletions(-)

Index: linux/arch/x86_64/kernel/smpboot.c
===================================================================
--- linux.orig/arch/x86_64/kernel/smpboot.c
+++ linux/arch/x86_64/kernel/smpboot.c
@@ -429,8 +429,8 @@ 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");

@@ -446,12 +446,7 @@ 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);

@@ -464,12 +459,7 @@ 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);
@@ -508,12 +498,7 @@ 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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