x86: I/O APIC: rename setup_ExtINT_IRQ0_pin()

Rename setup_ExtINT_IRQ0_pin() to setup_timer_IRQ0_pin() to better
reflect the upcoming role of a function setting up a (semi-)arbitrary I/O
APIC pin appropriately for the 8254 timer.  By "appropriate" the following
settings are meant: edge-triggered, active-high, all the other settings
per-architecture.  Adjust comments to reflect code appropriately.  No
functional changes.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 5 insertions, 5 deletions

diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c
index 565f19b01bf4..6c4635fa97a6 100644
--- a/arch/x86/kernel/io_apic_64.c
+++ b/arch/x86/kernel/io_apic_64.c
@@ -897,10 +897,10 @@ static void __init setup_IO_APIC_irqs(void)
 }
 
 /*
- * Set up the 8259A-master output pin as broadcast to all
- * CPUs.
+ * Set up the timer pin, possibly with the 8259A-master behind.
  */
-static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, int vector)
+static void __init setup_timer_IRQ0_pin(unsigned int apic, unsigned int pin,
+                                        int vector)
 {
         struct IO_APIC_route_entry entry;
 
@@ -920,7 +920,7 @@ static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, in
 
         /*
          * The timer IRQ doesn't have to know that behind the
-         * scene we have a 8259A-master in AEOI mode ...
+         * scene we may have a 8259A-master in AEOI mode ...
          */
         set_irq_chip_and_handler_name(0, &ioapic_chip, handle_edge_irq, "edge");
 
@@ -1690,7 +1690,7 @@ static inline void __init check_timer(void)
                 /*
                  * legacy devices should be connected to IO APIC #0
                  */
-                setup_ExtINT_IRQ0_pin(apic2, pin2, cfg->vector);
+                setup_timer_IRQ0_pin(apic2, pin2, cfg->vector);
                 enable_8259A_irq(0);
                 if (timer_irq_works()) {
                         apic_printk(APIC_VERBOSE," works.\n");