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>

diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c
index 51e5519..ce682e8 100644 (file)
--- a/arch/x86/kernel/io_apic_32.c
+++ b/arch/x86/kernel/io_apic_32.c
@@ -1302,9 +1302,10 @@ static void __init setup_IO_APIC_irqs(void)
 }
 
 /*
- * Set up the 8259A-master output pin:
+ * 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;
 
@@ -1324,7 +1325,7 @@ 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 ...
         */
        ioapic_register_intr(0, vector, IOAPIC_EDGE);
 
@@ -2183,7 +2184,7 @@ static inline void __init check_timer(void)
                /*
                 * legacy devices should be connected to IO APIC #0
                 */
-               setup_ExtINT_IRQ0_pin(apic2, pin2, vector);
+               setup_timer_IRQ0_pin(apic2, pin2, vector);
                enable_8259A_irq(0);
                if (timer_irq_works()) {
                        printk("works.\n");

diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c
index 565f19b..6c4635f 100644 (file)
--- 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");