diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2011-09-02 12:29:33 (GMT) |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-04-10 00:18:47 (GMT) |
| commit | 28fb38e470bf1dfe86fac22f31dd9bacb5e68459 (patch) | |
| tree | cada3124980db4f0cfc53f7197561080577562bf /kernel/printk | |
| parent | 765986731ec002f5608d3bd3d4a093b645fb40ed (diff) | |
| download | linux-fsl-qoriq-28fb38e470bf1dfe86fac22f31dd9bacb5e68459.tar.xz | |
printk: 'force_early_printk' boot param to help with debugging
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/r/1314967289.1301.11.camel@twins
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/n/tip-ykb97nsfmobq44xketrxs977@git.kernel.org
Diffstat (limited to 'kernel/printk')
| -rw-r--r-- | kernel/printk/printk.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index 68e3f1a..184e346 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -1518,6 +1518,13 @@ asmlinkage void early_printk(const char *fmt, ...) */ static bool __read_mostly printk_killswitch; +static int __init force_early_printk_setup(char *str) +{ + printk_killswitch = true; + return 0; +} +early_param("force_early_printk", force_early_printk_setup); + void printk_kill(void) { printk_killswitch = true; |