[tip:perf/urgent] perf: Mark expected switch fall-through

[tip-bot for Gustavo A. R. Silva]

Commit-ID:  10c3405f060397e565e4f75c403859f9a074bfa5
Gitweb:     https://git.kernel.org/tip/10c3405f060397e565e4f75c403859f9a074bfa5
Author:     Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
AuthorDate: Tue, 12 Feb 2019 14:54:30 -0600
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Fri, 1 Mar 2019 10:54:00 -0300

perf: Mark expected switch fall-through

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

This patch fixes the following warning:

  kernel/events/core.c: In function âperf_event_parse_addr_filterâ:
  kernel/events/core.c:9154:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
      kernel = 1;
      ~~~~~~~^~~
  kernel/events/core.c:9156:3: note: here
     case IF_SRC_FILEADDR:
     ^~~~

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>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Kees Kook <keescook@xxxxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20190212205430.GA8446@embeddedor
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 kernel/events/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index dd9698ad3d66..6fb27b564730 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -9175,6 +9175,7 @@ perf_event_parse_addr_filter(struct perf_event *event, char *fstr,
 		case IF_SRC_KERNELADDR:
 		case IF_SRC_KERNEL:
 			kernel = 1;
+			/* fall through */
 
 		case IF_SRC_FILEADDR:
 		case IF_SRC_FILE: