x86/apic: Fix typo EIO_ACK -> EOI_ACK and document it

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>
Cc: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: gleb@redhat.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/37867b31b9330690af2e60a2a7c4cb4b1b070caf.1337184153.git.mst@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/include/asm/apicdef.h b/arch/x86/include/asm/apicdef.h
index 134bba0..c46bb99 100644 (file)
--- 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 (file)
--- 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);
 }