Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=07f3331c6bfd27a06dfb0ca9fa4f06dec6606876
Commit:     07f3331c6bfd27a06dfb0ca9fa4f06dec6606876
Parent:     01a2f435564b4baab61328b4018d36464468f57b
Author:     Jeremy Fitzhardinge <[EMAIL PROTECTED]>
AuthorDate: Wed May 2 19:27:11 2007 +0200
Committer:  Andi Kleen <[EMAIL PROTECTED]>
CommitDate: Wed May 2 19:27:11 2007 +0200

    [PATCH] i386: Add machine_ops interface to abstract halting and rebooting
    
    machine_ops is an interface for the machine_* functions defined in
    <linux/reboot.h>.  This is intended to allow hypervisors to intercept
    the reboot process, but it could be used to implement other x86
    subarchtecture reboots.
    
    Signed-off-by: Jeremy Fitzhardinge <[EMAIL PROTECTED]>
    Signed-off-by: Andi Kleen <[EMAIL PROTECTED]>
---
 arch/i386/kernel/apm.c    |    3 +--
 arch/i386/kernel/reboot.c |   43 ++++++++++++++++++++++++++++++++++++++-----
 include/asm-i386/reboot.h |   20 ++++++++++++++++++++
 3 files changed, 59 insertions(+), 7 deletions(-)

diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
index 4d073d3..367ff1d 100644
--- a/arch/i386/kernel/apm.c
+++ b/arch/i386/kernel/apm.c
@@ -233,11 +233,10 @@
 #include <asm/desc.h>
 #include <asm/i8253.h>
 #include <asm/paravirt.h>
+#include <asm/reboot.h>
 
 #include "io_ports.h"
 
-extern void machine_real_restart(unsigned char *, int);
-
 #if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
 extern int (*console_blank_hook)(int);
 #endif
diff --git a/arch/i386/kernel/reboot.c b/arch/i386/kernel/reboot.c
index 8b5ff6e..14b4de2 100644
--- a/arch/i386/kernel/reboot.c
+++ b/arch/i386/kernel/reboot.c
@@ -18,6 +18,7 @@
 #include <asm/desc.h>
 #include "mach_reboot.h"
 #include <asm/reboot_fixups.h>
+#include <asm/reboot.h>
 
 /*
  * Power off function, if any
@@ -280,7 +281,7 @@ void machine_real_restart(unsigned char *code, int length)
 EXPORT_SYMBOL(machine_real_restart);
 #endif
 
-void machine_shutdown(void)
+static void native_machine_shutdown(void)
 {
 #ifdef CONFIG_SMP
        int reboot_cpu_id;
@@ -320,7 +321,7 @@ void __attribute__((weak)) mach_reboot_fixups(void)
 {
 }
 
-void machine_emergency_restart(void)
+static void native_machine_emergency_restart(void)
 {
        if (!reboot_thru_bios) {
                if (efi_enabled) {
@@ -344,17 +345,17 @@ void machine_emergency_restart(void)
        machine_real_restart(jump_to_bios, sizeof(jump_to_bios));
 }
 
-void machine_restart(char * __unused)
+static void native_machine_restart(char * __unused)
 {
        machine_shutdown();
        machine_emergency_restart();
 }
 
-void machine_halt(void)
+static void native_machine_halt(void)
 {
 }
 
-void machine_power_off(void)
+static void native_machine_power_off(void)
 {
        if (pm_power_off) {
                machine_shutdown();
@@ -363,3 +364,35 @@ void machine_power_off(void)
 }
 
 
+struct machine_ops machine_ops = {
+       .power_off = native_machine_power_off,
+       .shutdown = native_machine_shutdown,
+       .emergency_restart = native_machine_emergency_restart,
+       .restart = native_machine_restart,
+       .halt = native_machine_halt,
+};
+
+void machine_power_off(void)
+{
+       machine_ops.power_off();
+}
+
+void machine_shutdown(void)
+{
+       machine_ops.shutdown();
+}
+
+void machine_emergency_restart(void)
+{
+       machine_ops.emergency_restart();
+}
+
+void machine_restart(char *cmd)
+{
+       machine_ops.restart(cmd);
+}
+
+void machine_halt(void)
+{
+       machine_ops.halt();
+}
diff --git a/include/asm-i386/reboot.h b/include/asm-i386/reboot.h
new file mode 100644
index 0000000..e9e3ffc
--- /dev/null
+++ b/include/asm-i386/reboot.h
@@ -0,0 +1,20 @@
+#ifndef _ASM_REBOOT_H
+#define _ASM_REBOOT_H
+
+struct pt_regs;
+
+struct machine_ops
+{
+       void (*restart)(char *cmd);
+       void (*halt)(void);
+       void (*power_off)(void);
+       void (*shutdown)(void);
+       void (*crash_shutdown)(struct pt_regs *);
+       void (*emergency_restart)(void);
+};
+
+extern struct machine_ops machine_ops;
+
+void machine_real_restart(unsigned char *code, int length);
+
+#endif /* _ASM_REBOOT_H */
-
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