Messages in this thread Patch in this message | | | Subject | [PATCH -rt] printk: 'force_early_printk' boot param to help with debugging | From | Peter Zijlstra <> | Date | Fri, 02 Sep 2011 14:41:29 +0200 |
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Subject: printk: 'force_early_printk' boot param to help with debugging From: Peter Zijlstra <a.p.zijlstra@chello.nl> Date: Fri Sep 02 14:29:33 CEST 2011
Gives me an option to screw printk and actually see what the machine says.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-ykb97nsfmobq44xketrxs977@git.kernel.org --- kernel/printk.c | 7 +++++++ 1 file changed, 7 insertions(+)
Index: linux-2.6/kernel/printk.c =================================================================== --- linux-2.6.orig/kernel/printk.c +++ linux-2.6/kernel/printk.c @@ -541,6 +541,13 @@ asmlinkage void early_printk(const char */ static int __read_mostly printk_killswitch; +static int __init force_early_printk_setup(char *str) +{ + printk_killswitch = 1; + return 0; +} +early_param("force_early_printk", force_early_printk_setup); + void printk_kill(void) { printk_killswitch = 1;
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