[GIT PULL 2/7] intel_th: Mark expected switch fall-throughs

From: Alexander Shishkin
Date: Thu Feb 21 2019 - 08:50:46 EST


From: "Gustavo A. R. Silva" <gustavo@xxxxxxxxxxxxxx>

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warnings:

drivers/hwtracing/intel_th/sth.c: In function âsth_stm_packetâ:
drivers/hwtracing/intel_th/sth.c:86:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
reg += 4;
~~~~^~~~
drivers/hwtracing/intel_th/sth.c:87:2: note: here
case STP_PACKET_XSYNC:
^~~~
drivers/hwtracing/intel_th/sth.c:88:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
reg += 8;
~~~~^~~~
drivers/hwtracing/intel_th/sth.c:89:2: note: here
case STP_PACKET_TRIG:
^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
Signed-off-by: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
---
drivers/hwtracing/intel_th/sth.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/hwtracing/intel_th/sth.c b/drivers/hwtracing/intel_th/sth.c
index 4b7ae47789d2..3a1f4e650378 100644
--- a/drivers/hwtracing/intel_th/sth.c
+++ b/drivers/hwtracing/intel_th/sth.c
@@ -84,8 +84,12 @@ static ssize_t notrace sth_stm_packet(struct stm_data *stm_data,
/* Global packets (GERR, XSYNC, TRIG) are sent with register writes */
case STP_PACKET_GERR:
reg += 4;
+ /* fall through */
+
case STP_PACKET_XSYNC:
reg += 8;
+ /* fall through */
+
case STP_PACKET_TRIG:
if (flags & STP_PACKET_TIMESTAMPED)
reg += 4;
--
2.20.1