[PATCH RFC 1/5] apic: fix typo EIO_ACK -> EOI_ACK and document

["Michael S. Tsirkin" <mst@redhat.com>]

Fix typo in the macro name and document the
reason it has this value. Update users.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 arch/x86/include/asm/apicdef.h         |    2 +-
 arch/x86/platform/visws/visws_quirks.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/apicdef.h b/arch/x86/include/asm/apicdef.h
index 134bba0..c46bb99 100644
--- a/arch/x86/include/asm/apicdef.h
+++ b/arch/x86/include/asm/apicdef.h
@@ -37,7 +37,7 @@
 #define		APIC_ARBPRI_MASK	0xFFu
 #define	APIC_PROCPRI	0xA0
 #define	APIC_EOI	0xB0
-#define		APIC_EIO_ACK		0x0
+#define		APIC_EOI_ACK		0x0 /* Docs say 0 for future compat. */
 #define	APIC_RRR	0xC0
 #define	APIC_LDR	0xD0
 #define		APIC_LDR_MASK		(0xFFu << 24)
diff --git a/arch/x86/platform/visws/visws_quirks.c b/arch/x86/platform/visws/visws_quirks.c
index c7abf13..94d8a39 100644
--- a/arch/x86/platform/visws/visws_quirks.c
+++ b/arch/x86/platform/visws/visws_quirks.c
@@ -445,7 +445,7 @@ static void ack_cobalt_irq(struct irq_data *data)
 
 	spin_lock_irqsave(&cobalt_lock, flags);
 	disable_cobalt_irq(data);
-	apic_write(APIC_EOI, APIC_EIO_ACK);
+	apic_write(APIC_EOI, APIC_EOI_ACK);
 	spin_unlock_irqrestore(&cobalt_lock, flags);
 }
 
-- 
1.7.9.111.gf3fb0