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* [PATCH] fix 'dynamic_debug' cmd line parameter
@ 2008-10-27 16:05 Jason Baron
  0 siblings, 0 replies; only message in thread
From: Jason Baron @ 2008-10-27 16:05 UTC (permalink / raw)
  To: gregkh; +Cc: linux-kernel


In testing 2.6.28-rc1, I found that passing 'dynamic_printk' on the command
line didn't activate the debug code. The problem is that dynamic_printk_setup()
(which activates the debugging) is being called before dynamic_printk_init() is
called (which initializes infrastructure). Fix this by setting setting the
state to 'DYNAMIC_ENABLED_ALL' in dynamic_printk_setup(), which will also
cause all subsequent modules to have debugging automatically started, which is
probably the behavior we want.



Signed-off-by: Jason Baron <>

diff --git a/lib/dynamic_printk.c b/lib/dynamic_printk.c
index d640f87..d83660f 100644
--- a/lib/dynamic_printk.c
+++ b/lib/dynamic_printk.c
@@ -402,6 +402,8 @@ static int __init dynamic_printk_init(void)
 				iter->flag_names, iter->hash, iter->hash2);
+	if (dynamic_enabled == DYNAMIC_ENABLED_ALL)
+		set_all(true);
 	return 0;
@@ -411,7 +413,7 @@ static int __init dynamic_printk_setup(char *str)
 	if (str)
 		return -ENOENT;
-	set_all(true);
+	dynamic_enabled = DYNAMIC_ENABLED_ALL;
 	return 0;
 /* Use early_param(), so we can get debug output as early as possible */

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2008-10-27 16:05 [PATCH] fix 'dynamic_debug' cmd line parameter Jason Baron

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