[PATCH] 2.5.21 deadlocks on UP (SMP kernel) w/ IOAPIC

ec5d3aca · Zwane Mwaikambo · Dave Kleikamp · 567a5e73 · ec5d3aca
Commit ec5d3aca authored Jun 13, 2002 by Zwane Mwaikambo Committed by Dave Kleikamp Jun 13, 2002
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arch/i386/kernel/io_apic.c arch/i386/kernel/io_apic.c +1 -1

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--- a/arch/i386/kernel/io_apic.c
+++ b/arch/i386/kernel/io_apic.c
@@ -251,7 +251,7 @@ static inline void balance_irq(int irq)
 	irq_balance_t *entry = irq_balance + irq;
 	unsigned long now = jiffies;
-	if (unlikely(entry->timestamp != now)) {
+	if ((entry->timestamp != now) && (smp_num_cpus > 1)) {
 		unsigned long allowed_mask;
 		int random_number;