Document powerpc udbg-immortal

Back in 2006 the "udbg-immortal" kernel option has been introduced: > commit 3b5e905 > Author: Benjamin Herrenschmidt <[email protected]> > Date: Wed Jun 7 12:06:20 2006 +1000 > > [PATCH] powerpc: Add udbg-immortal kernel option ...but I could not find it documented anywhere in the sources. This patch adds it to Documentation/kernel-parameters.txt. Signed-off-by: Christian Kujau <[email protected]> Signed-off-by: Benjamin Herrenschmidt <[email protected]>
nemunaire · Jun 20, 2011 · b6935f8 · b6935f8
1 parent 77ef489
commit b6935f8
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
@@ -2524,6 +2524,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 			<port#>,<js1>,<js2>,<js3>,<js4>,<js5>,<js6>,<js7>
 			See also Documentation/input/joystick-parport.txt
 
+	udbg-immortal	[PPC] When debugging early kernel crashes that
+			happen after console_init() and before a proper 
+			console driver takes over, this boot options might
+			help "seeing" what's going on.
+
 	uhash_entries=	[KNL,NET]
 			Set number of hash buckets for UDP/UDP-Lite connections