remove RESTARTABLE_PANICS option

This is done per request/suggestion from John Baldwin
who introduced the option.  Trying to resume normal
system operation after a panic is very unpredictable
and dangerous.  It will become even more dangerous
when we allow a thread in panic(9) to penetrate all
lock contexts.
I understand that the only purpose of this option was
for testing scenarios potentially resulting in panic.

Suggested by:	jhb
Reviewed by:	attilio, jhb
X-MFC-After:	never
Approved by:	re (kib)

1 files changed, 0 insertions, 9 deletions

diff --git a/sys/kern/kern_shutdown.c b/sys/kern/kern_shutdown.c
index 60e854f..7621b15 100644
--- a/sys/kern/kern_shutdown.c
+++ b/sys/kern/kern_shutdown.c
@@ -585,15 +585,6 @@ panic(const char *fmt, ...)
 		kdb_backtrace();
 	if (debugger_on_panic)
 		kdb_enter(KDB_WHY_PANIC, "panic");
-#ifdef RESTARTABLE_PANICS
-	/* See if the user aborted the panic, in which case we continue. */
-	if (panicstr == NULL) {
-#ifdef SMP
-		atomic_store_rel_int(&panic_cpu, NOCPU);
-#endif
-		return;
-	}
-#endif
 #endif
 	/*thread_lock(td); */
 	td->td_flags |= TDF_INPANIC;