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Subject[PATCH 6/10] inquire_remote_apic: use safe_apic_wait_icr_idle - x86_64
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inquire_remote_apic is used for APIC debugging, so use
safe_apic_wait_icr_idle instead of apic_wait_icr_idle to avoid possible
lockups when APIC delivery fails.

Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.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 15:53:11.000000000 +0900
+++ linux-2.6.21-rc7/arch/x86_64/kernel/smpboot.c 2007-04-18 16:39:20.000000000 +0900
@@ -392,7 +392,8 @@ static void inquire_remote_apic(int apic
{
unsigned i, regs[] = { APIC_ID >> 4, APIC_LVR >> 4, APIC_SPIV >> 4 };
char *names[] = { "ID", "VERSION", "SPIV" };
- int timeout, status;
+ int timeout;
+ unsigned int status;

printk(KERN_INFO "Inquiring remote APIC #%d...\n", apicid);

@@ -402,7 +403,9 @@ static void inquire_remote_apic(int apic
/*
* Wait for idle.
*/
- apic_wait_icr_idle();
+ status = safe_apic_wait_icr_idle();
+ if (status)
+ printk("a previous APIC delivery may have failed\n");

apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(apicid));
apic_write(APIC_ICR, APIC_DM_REMRD | regs[i]);

-
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