* [PATCH 3/5] random run-time configurable debugging
@ 2005-01-13 6:43 Matt Mackall
0 siblings, 0 replies; only message in thread
From: Matt Mackall @ 2005-01-13 6:43 UTC (permalink / raw)
To: Andrew Morton, Theodore Y. Ts'o, linux-kernel
Add run-time switchable entropy debugging. Entire debug infrastructure
remains compiled out by default.
Signed-off-by: Matt Mackall <mpm@selenic.com>
Index: rnd/drivers/char/random.c
===================================================================
--- rnd.orig/drivers/char/random.c 2005-01-12 21:27:53.763311053 -0800
+++ rnd/drivers/char/random.c 2005-01-12 21:27:56.027022454 -0800
@@ -473,12 +473,15 @@
#endif
#if 0
-#define DEBUG_ENT(fmt, arg...) printk(KERN_DEBUG "random %04d %04d %04d: " \
+static int debug = 0;
+module_param(debug, bool, 0644);
+#define DEBUG_ENT(fmt, arg...) do { if (debug) \
+ printk(KERN_DEBUG "random %04d %04d %04d: " \
fmt,\
random_state->entropy_count,\
sec_random_state->entropy_count,\
urandom_state->entropy_count,\
- ## arg)
+ ## arg); } while (0)
#else
#define DEBUG_ENT(fmt, arg...) do {} while (0)
#endif
--
Mathematics is the supreme nostalgia of our time.
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