From: Matt Mackall <mpm@selenic.com>
Add run-time switchable entropy debugging. Entire debug infrastructure
remains compiled out by default.
Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
25-akpm/drivers/char/random.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff -puN drivers/char/random.c~random-run-time-configurable-debugging drivers/char/random.c
--- 25/drivers/char/random.c~random-run-time-configurable-debugging 2005-01-12 23:16:37.449479656 -0800
+++ 25-akpm/drivers/char/random.c 2005-01-12 23:16:37.455478744 -0800
@@ -473,12 +473,15 @@ static inline __u32 int_ln_12bits(__u32
#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
_