From 3b5e905ee3bd23e9311951890aba57a0dbc81ca4 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Wed, 7 Jun 2006 12:06:20 +1000 Subject: [PATCH] [PATCH] powerpc: Add udbg-immortal kernel option When debugging early kernel crashes that happen after console_init() and before a proper console driver takes over, we often have to go hack into udbg.c to prevent it from unregistering so we can "see" what is happening. This patch adds a kernel command line option "udbg-immortal" instead to avoid having to modify the kernel. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/udbg.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c index 3774e80094..67d9fd9ae2 100644 --- a/arch/powerpc/kernel/udbg.c +++ b/arch/powerpc/kernel/udbg.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -141,12 +142,14 @@ static int early_console_initialized; void __init disable_early_printk(void) { -#if 1 if (!early_console_initialized) return; + if (strstr(saved_command_line, "udbg-immortal")) { + printk(KERN_INFO "early console immortal !\n"); + return; + } unregister_console(&udbg_console); early_console_initialized = 0; -#endif } /* called by setup_system */ -- 2.20.1