[PATCH] i386: use safe_apic_wait_icr_idle in smpboot.c

__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>
Signed-off-by: Andi Kleen <ak@suse.de>

diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index 94dce14a1b37605c99dddec566df700207588f19..a768eceeac37c71f7f72d3a6d94a0c71509b0aae 100644 (file)
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -521,7 +521,8 @@ static inline void __inquire_remote_apic(int apicid)
 {
        int i, regs[] = { APIC_ID >> 4, APIC_LVR >> 4, APIC_SPIV >> 4 };
        char *names[] = { "ID", "VERSION", "SPIV" };
-       int timeout, status;
+       int timeout;
+       unsigned long status;
 
        printk("Inquiring remote APIC #%d...\n", apicid);
 
@@ -531,7 +532,9 @@ static inline void __inquire_remote_apic(int apicid)
                /*
                 * 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_around(APIC_ICR2, SET_APIC_DEST_FIELD(apicid));
                apic_write_around(APIC_ICR, APIC_DM_REMRD | regs[i]);