Merge ../linus

[pandora-kernel.git] / arch / s390 / kernel / setup.c

diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index b282034..2b2551e 100644 (file)
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -37,6 +37,7 @@
 #include <linux/seq_file.h>
 #include <linux/kernel_stat.h>
 #include <linux/device.h>
+#include <linux/notifier.h>
 
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -115,6 +116,7 @@ void __devinit cpu_init (void)
  */
 char vmhalt_cmd[128] = "";
 char vmpoff_cmd[128] = "";
+char vmpanic_cmd[128] = "";
 
 static inline void strncpy_skip_quote(char *dst, char *src, int n)
 {
@@ -146,6 +148,38 @@ static int __init vmpoff_setup(char *str)
 
 __setup("vmpoff=", vmpoff_setup);
 
+static int vmpanic_notify(struct notifier_block *self, unsigned long event,
+                         void *data)
+{
+       if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0)
+               cpcmd(vmpanic_cmd, NULL, 0, NULL);
+
+       return NOTIFY_OK;
+}
+
+#define PANIC_PRI_VMPANIC      0
+
+static struct notifier_block vmpanic_nb = {
+       .notifier_call = vmpanic_notify,
+       .priority = PANIC_PRI_VMPANIC
+};
+
+static int __init vmpanic_setup(char *str)
+{
+       static int register_done __initdata = 0;
+
+       strncpy_skip_quote(vmpanic_cmd, str, 127);
+       vmpanic_cmd[127] = 0;
+       if (!register_done) {
+               register_done = 1;
+               atomic_notifier_chain_register(&panic_notifier_list,
+                                              &vmpanic_nb);
+       }
+       return 1;
+}
+
+__setup("vmpanic=", vmpanic_setup);
+
 /*
  * condev= and conmode= setup parameter.
  */
@@ -289,19 +323,34 @@ void (*_machine_power_off)(void) = do_machine_power_off_nonsmp;
 
 void machine_restart(char *command)
 {
-       console_unblank();
+       if (!in_interrupt() || oops_in_progress)
+               /*
+                * Only unblank the console if we are called in enabled
+                * context or a bust_spinlocks cleared the way for us.
+                */
+               console_unblank();
        _machine_restart(command);
 }
 
 void machine_halt(void)
 {
-       console_unblank();
+       if (!in_interrupt() || oops_in_progress)
+               /*
+                * Only unblank the console if we are called in enabled
+                * context or a bust_spinlocks cleared the way for us.
+                */
+               console_unblank();
        _machine_halt();
 }
 
 void machine_power_off(void)
 {
-       console_unblank();
+       if (!in_interrupt() || oops_in_progress)
+               /*
+                * Only unblank the console if we are called in enabled
+                * context or a bust_spinlocks cleared the way for us.
+                */
+               console_unblank();
        _machine_power_off();
 }