x86/ioapic/kcrash: Prevent crash_kexec() from deadlocking on ioapic_lock

[~andy/linux] / arch / x86 / kernel / apic / io_apic.c

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 9ed796ccc32ccda58fe9e1d914aa2c7828845d0c..260abc2f9eebda97d39b4108524529320e548a7b 100644 (file)
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1534,6 +1534,11 @@ void intel_ir_io_apic_print_entries(unsigned int apic,
        }
 }
 
+void ioapic_zap_locks(void)
+{
+       raw_spin_lock_init(&ioapic_lock);
+}
+
 __apicdebuginit(void) print_IO_APIC(int ioapic_idx)
 {
        union IO_APIC_reg_00 reg_00;