rds: debug messages are enabled by default

rds use Kconfig option called "RDS_DEBUG" to enable rds debug messages.
This option cause the rds Makefile to add -DDEBUG to the rds gcc command
line.

When CONFIG_DYNAMIC_DEBUG is enabled, the "DEBUG" macro is used by
include/linux/dynamic_debug.h to decide if dynamic debug prints should
be sent by default to the kernel log.

rds should not enable this macro for production builds. rds dynamic
debug work as expected follow this fix.
Signed-off-by: NShamir Rabinovitch <shamir.rabinovitch@oracle.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@oracle.com>
Reviewed-by: NWengang Wang <wen.gang.wang@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/rds/Makefile

@@ -13,5 +13,5 @@ obj-$(CONFIG_RDS_TCP) += rds_tcp.o
 rds_tcp-y :=		tcp.o tcp_connect.o tcp_listen.o tcp_recv.o \
 			tcp_send.o tcp_stats.o
 
-ccflags-$(CONFIG_RDS_DEBUG)	:=	-DDEBUG
+ccflags-$(CONFIG_RDS_DEBUG)	:=	-DRDS_DEBUG
 

net/rds/rds.h

@@ -33,7 +33,7 @@
 #define KERNEL_HAS_ATOMIC64
 #endif
 
-#ifdef DEBUG
+#ifdef RDS_DEBUG
 #define rdsdebug(fmt, args...) pr_debug("%s(): " fmt, __func__ , ##args)
 #else
 /* sigh, pr_debug() causes unused variable warnings */