x86, nmi_watchdog: Remove all stub function calls from old nmi_watchdog

Now that the bulk of the old nmi_watchdog is gone, remove all
the stub variables and hooks associated with it.

This touches lots of files mainly because of how the io_apic
nmi_watchdog was implemented.  Now that the io_apic nmi_watchdog
is forever gone, remove all its fingers.

Most of this code was not being exercised by virtue of
nmi_watchdog != NMI_IO_APIC, so there shouldn't be anything to
risky here.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: fweisbec@gmail.com
Cc: gorcunov@openvz.org
LKML-Reference: <1289578944-28564-3-git-send-email-dzickus@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 46 deletions

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 7cc0a721f628..e4a040c28de1 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -54,7 +54,6 @@
 #include <asm/dma.h>
 #include <asm/timer.h>
 #include <asm/i8259.h>
-#include <asm/nmi.h>
 #include <asm/msidef.h>
 #include <asm/hypertransport.h>
 #include <asm/setup.h>
@@ -2643,24 +2642,6 @@ static void lapic_register_intr(int irq)
                                       "edge");
 }
 
-static void __init setup_nmi(void)
-{
-        /*
-         * Dirty trick to enable the NMI watchdog ...
-         * We put the 8259A master into AEOI mode and
-         * unmask on all local APICs LVT0 as NMI.
-         *
-         * The idea to use the 8259A in AEOI mode ('8259A Virtual Wire')
-         * is from Maciej W. Rozycki - so we do not have to EOI from
-         * the NMI handler or the timer interrupt.
-         */
-        apic_printk(APIC_VERBOSE, KERN_INFO "activating NMI Watchdog ...");
-
-        enable_NMI_through_LVT0();
-
-        apic_printk(APIC_VERBOSE, " done.\n");
-}
-
 /*
  * This looks a bit hackish but it's about the only one way of sending
  * a few INTA cycles to 8259As and any associated glue logic.  ICR does
@@ -2766,15 +2747,6 @@ static inline void __init check_timer(void)
          */
         apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
         legacy_pic->init(1);
-#ifdef CONFIG_X86_32
-        {
-                unsigned int ver;
-
-                ver = apic_read(APIC_LVR);
-                ver = GET_APIC_VERSION(ver);
-                timer_ack = (nmi_watchdog == NMI_IO_APIC && !APIC_INTEGRATED(ver));
-        }
-#endif
 
         pin1  = find_isa_irq_pin(0, mp_INT);
         apic1 = find_isa_irq_apic(0, mp_INT);
@@ -2822,10 +2794,6 @@ static inline void __init check_timer(void)
                                 unmask_ioapic(cfg);
                 }
                 if (timer_irq_works()) {
-                        if (nmi_watchdog == NMI_IO_APIC) {
-                                setup_nmi();
-                                legacy_pic->unmask(0);
-                        }
                         if (disable_timer_pin_1 > 0)
                                 clear_IO_APIC_pin(0, pin1);
                         goto out;
@@ -2851,11 +2819,6 @@ static inline void __init check_timer(void)
                 if (timer_irq_works()) {
                         apic_printk(APIC_QUIET, KERN_INFO "....... works.\n");
                         timer_through_8259 = 1;
-                        if (nmi_watchdog == NMI_IO_APIC) {
-                                legacy_pic->mask(0);
-                                setup_nmi();
-                                legacy_pic->unmask(0);
-                        }
                         goto out;
                 }
                 /*
@@ -2867,15 +2830,6 @@ static inline void __init check_timer(void)
                 apic_printk(APIC_QUIET, KERN_INFO "....... failed.\n");
         }
 
-        if (nmi_watchdog == NMI_IO_APIC) {
-                apic_printk(APIC_QUIET, KERN_WARNING "timer doesn't work "
-                            "through the IO-APIC - disabling NMI Watchdog!\n");
-                nmi_watchdog = NMI_NONE;
-        }
-#ifdef CONFIG_X86_32
-        timer_ack = 0;
-#endif
-
         apic_printk(APIC_QUIET, KERN_INFO
                     "...trying to set up timer as Virtual Wire IRQ...\n");