prevent recursive panic from softlockup watchdog

[Jan Beulich <jbeulich@novell.com>]

From: Jan Beulich <jbeulich@novell.com>

When panic_timeout is zero, suppress triggering a nested panic due to soft
lockup detection.

Signed-Off-By: Jan Beulich <jbeulich@novell.com>

diff -Npru /home/jbeulich/tmp/linux-2.6.16-rc2/kernel/panic.c 2.6.16-rc2-panic-softlockup/kernel/panic.c
--- /home/jbeulich/tmp/linux-2.6.16-rc2/kernel/panic.c	2006-02-06 11:02:54.000000000 +0100
+++ 2.6.16-rc2-panic-softlockup/kernel/panic.c	2006-01-25 09:55:53.000000000 +0100
@@ -130,6 +130,7 @@ NORET_TYPE void panic(const char * fmt, 
 #endif
 	local_irq_enable();
 	for (i = 0;;) {
+		touch_softlockup_watchdog();
 		i += panic_blink(i);
 		mdelay(1);
 		i++;

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