[PATCH] x86_64: add an option to configure oops stack dump

Add an kstack= option to configure how much stack should be printed on a
oops.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/x86_64/kernel/traps.c

@@ -900,3 +900,11 @@ static int __init oops_dummy(char *s)
 	return -1; 
 } 
 __setup("oops=", oops_dummy); 
+
+static int __init kstack_setup(char *s)
+{
+	kstack_depth_to_print = simple_strtoul(s,NULL,0);
+	return 0;
+}
+__setup("kstack=", kstack_setup);
+