linux-kernel - [PATCH 4.16 072/279] usb: typec: ucsi: fix tracepoint related build error

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Message-Id: <20180618080611.795004695@linuxfoundation.org>
Date:   Mon, 18 Jun 2018 10:10:57 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Tobias Regnery <tobias.regnery@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.16 072/279] usb: typec: ucsi: fix tracepoint related build error

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tobias Regnery <tobias.regnery@...il.com>

[ Upstream commit 2f860691c2d2e3af1404ffeb2d22dd5c3dbca811 ]

There is the following build error with CONFIG_TYPEC_UCSI=m, CONFIG_FTRACE=y
and CONFIG_TRACING=n:

ERROR: "__tracepoint_ucsi_command" [drivers/usb/typec/ucsi/typec_ucsi.ko] undefined!
ERROR: "__tracepoint_ucsi_register_port" [drivers/usb/typec/ucsi/typec_ucsi.ko] undefined!
ERROR: "__tracepoint_ucsi_notify" [drivers/usb/typec/ucsi/typec_ucsi.ko] undefined!
ERROR: "__tracepoint_ucsi_reset_ppm" [drivers/usb/typec/ucsi/typec_ucsi.ko] undefined!
ERROR: "__tracepoint_ucsi_run_command" [drivers/usb/typec/ucsi/typec_ucsi.ko] undefined!
ERROR: "__tracepoint_ucsi_ack" [drivers/usb/typec/ucsi/typec_ucsi.ko] undefined!
ERROR: "__tracepoint_ucsi_connector_change" [drivers/usb/typec/ucsi/typec_ucsi.ko] undefined!

This compination is quite hard to create because CONFIG_TRACING gets selected
only in rare cases without CONFIG_FTRACE.

The build failure is caused by conditionally compiling trace.c depending on
the wrong option CONFIG_FTRACE. Change this to depend on CONFIG_TRACING like
other users of tracepoints do.

Fixes: c1b0bc2dabfa ("usb: typec: Add support for UCSI interface")
Signed-off-by: Tobias Regnery <tobias.regnery@...il.com>
Acked-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/usb/typec/ucsi/Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/typec/ucsi/Makefile
+++ b/drivers/usb/typec/ucsi/Makefile
@@ -5,6 +5,6 @@ obj-$(CONFIG_TYPEC_UCSI)	+= typec_ucsi.o

 typec_ucsi-y			:= ucsi.o

-typec_ucsi-$(CONFIG_FTRACE)	+= trace.o
+typec_ucsi-$(CONFIG_TRACING)	+= trace.o

 obj-$(CONFIG_UCSI_ACPI)		+= ucsi_acpi.o