[NET]: Replace CONFIG_NET_DEBUG with sysctl.

Covert network warning messages from a compile time to runtime choice.
Removes kernel config option and replaces it with new /proc/sys/net/core/warnings.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 6 insertions, 7 deletions

diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index c9ccb550206f..df2d9ed20a4e 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -290,6 +290,7 @@ enum
         NET_CORE_BUDGET=19,
         NET_CORE_AEVENT_ETIME=20,
         NET_CORE_AEVENT_RSEQTH=21,
+        NET_CORE_WARNINGS=22,
 };
 
 /* /proc/sys/net/ethernet */
diff --git a/include/net/sock.h b/include/net/sock.h
index d093e49fdc85..51246579592e 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1334,14 +1334,12 @@ extern int sock_get_timestampns(struct sock *, struct timespec __user *);
 /* 
  *      Enable debug/info messages 
  */
+extern int net_msg_warn;
+#define NETDEBUG(fmt, args...) \
+        do { if (net_msg_warn) printk(fmt,##args); } while (0)
 
-#ifdef CONFIG_NETDEBUG
-#define NETDEBUG(fmt, args...)  printk(fmt,##args)
-#define LIMIT_NETDEBUG(fmt, args...) do { if (net_ratelimit()) printk(fmt,##args); } while(0)
-#else
-#define NETDEBUG(fmt, args...)  do { } while (0)
-#define LIMIT_NETDEBUG(fmt, args...) do { } while(0)
-#endif
+#define LIMIT_NETDEBUG(fmt, args...) \
+        do { if (net_msg_warn && net_ratelimit()) printk(fmt,##args); } while(0)
 
 /*
  * Macros for sleeping on a socket. Use them like this: