x86: use bitmap library for pin_programmed

Use bitmap library for pin_programmed rather than reinvent
bitmaps.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 534790b6d0f111354de80705201d2f4d7716fbe0..23e8432a9826a090a1d54af86d99bfec2085dd69 100644 (file)
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -799,7 +799,6 @@ void __init find_smp_config(void)
 #ifdef CONFIG_X86_IO_APIC
 
 #define MP_ISA_BUS             0
-#define MP_MAX_IOAPIC_PIN      127
 
 extern struct mp_ioapic_routing mp_ioapic_routing[MAX_IO_APICS];
 
@@ -982,9 +981,8 @@ void __init mp_config_acpi_legacy_irqs(void)
 
 int mp_register_gsi(u32 gsi, int triggering, int polarity)
 {
-       int ioapic = -1;
-       int ioapic_pin = 0;
-       int idx, bit = 0;
+       int ioapic;
+       int ioapic_pin;
 #ifdef CONFIG_X86_32
 #define MAX_GSI_NUM    4096
 #define IRQ_COMPRESSION_START  64
@@ -1024,15 +1022,13 @@ int mp_register_gsi(u32 gsi, int triggering, int polarity)
         * with redundant pin->gsi mappings (but unique PCI devices);
         * we only program the IOAPIC on the first.
         */
-       bit = ioapic_pin % 32;
-       idx = (ioapic_pin < 32) ? 0 : (ioapic_pin / 32);
-       if (idx > 3) {
+       if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
                printk(KERN_ERR "Invalid reference to IOAPIC pin "
                       "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
                       ioapic_pin);
                return gsi;
        }
-       if ((1 << bit) & mp_ioapic_routing[ioapic].pin_programmed[idx]) {
+       if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
                Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
                        mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
 #ifdef CONFIG_X86_32
@@ -1042,7 +1038,7 @@ int mp_register_gsi(u32 gsi, int triggering, int polarity)
 #endif
        }
 
-       mp_ioapic_routing[ioapic].pin_programmed[idx] |= (1 << bit);
+       set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
 #ifdef CONFIG_X86_32
        /*
         * For GSI >= 64, use IRQ compression

diff --git a/include/asm-x86/io_apic.h b/include/asm-x86/io_apic.h
index 0c9e17c73e05b9da8654199a184c003e5d957e45..d593e14f03411df3797562d4e01ed318b00efdc2 100644 (file)
--- a/include/asm-x86/io_apic.h
+++ b/include/asm-x86/io_apic.h
@@ -1,7 +1,7 @@
 #ifndef __ASM_IO_APIC_H
 #define __ASM_IO_APIC_H
 
-#include <asm/types.h>
+#include <linux/types.h>
 #include <asm/mpspec.h>
 #include <asm/apicdef.h>
 
@@ -110,11 +110,13 @@ extern int nr_ioapic_registers[MAX_IO_APICS];
  * MP-BIOS irq configuration table structures:
  */
 
+#define MP_MAX_IOAPIC_PIN 127
+
 struct mp_ioapic_routing {
        int apic_id;
        int gsi_base;
        int gsi_end;
-       u32 pin_programmed[4];
+       DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
 };
 
 /* I/O APIC entries */