net: rds: add option for GCOV profiling

To better our unit tests we need code coverage to be part of the kernel.
This patch borrows heavily from how CONFIG_GCOV_PROFILE_FTRACE is
implemented

Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Allison Henderson <allison.henderson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/rds/Kconfig b/net/rds/Kconfig
index 75cd696..f007730 100644 (file)
--- a/net/rds/Kconfig
+++ b/net/rds/Kconfig
@@ -26,3 +26,12 @@ config RDS_DEBUG
        bool "RDS debugging messages"
        depends on RDS
        default n
+
+config GCOV_PROFILE_RDS
+       bool "Enable GCOV profiling on RDS"
+       depends on GCOV_KERNEL
+       help
+         Enable GCOV profiling on RDS for checking which functions/lines
+         are executed.
+
+         If unsure, say N.

diff --git a/net/rds/Makefile b/net/rds/Makefile
index 8fdc118..3af1ca1 100644 (file)
--- a/net/rds/Makefile
+++ b/net/rds/Makefile
@@ -15,3 +15,8 @@ rds_tcp-y :=          tcp.o tcp_connect.o tcp_listen.o tcp_recv.o \
                        tcp_send.o tcp_stats.o
 
 ccflags-$(CONFIG_RDS_DEBUG)    :=      -DRDS_DEBUG
+
+# for GCOV coverage profiling
+ifdef CONFIG_GCOV_PROFILE_RDS
+GCOV_PROFILE := y
+endif