Patch "perf intel-pt: Use __fallthrough" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    perf intel-pt: Use __fallthrough

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     perf-intel-pt-use-__fallthrough.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 7ea6856d6f5629d742edc23b8b76e6263371ef45 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Thu, 9 Feb 2017 15:22:22 -0300
Subject: perf intel-pt: Use __fallthrough

From: Arnaldo Carvalho de Melo <acme@redhat.com>

commit 7ea6856d6f5629d742edc23b8b76e6263371ef45 upstream.

To address new warnings emmited by gcc 7, e.g.::

    CC       /tmp/build/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.o
    CC       /tmp/build/perf/tests/parse-events.o
  util/intel-pt-decoder/intel-pt-pkt-decoder.c: In function 'intel_pt_pkt_desc':
  util/intel-pt-decoder/intel-pt-pkt-decoder.c:499:6: error: this statement may fall through [-Werror=implicit-fallthrough=]
     if (!(packet->count))
        ^
  util/intel-pt-decoder/intel-pt-pkt-decoder.c:501:2: note: here
    case INTEL_PT_CYC:
    ^~~~
    CC       /tmp/build/perf/util/intel-pt-decoder/intel-pt-decoder.o
  cc1: all warnings being treated as errors

Acked-by: Andi Kleen <ak@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-mf0hw789pu9x855us5l32c83@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 tools/perf/util/intel-pt-decoder/intel-pt-decoder.c     |    5 +++++
 tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c |    2 ++
 2 files changed, 7 insertions(+)

--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -22,6 +22,7 @@
 #include <errno.h>
 #include <stdint.h>
 #include <inttypes.h>
+#include <linux/compiler.h>
 
 #include "../cache.h"
 #include "../util.h"
@@ -1708,6 +1709,7 @@ static int intel_pt_walk_psb(struct inte
 		switch (decoder->packet.type) {
 		case INTEL_PT_TIP_PGD:
 			decoder->continuous_period = false;
+			__fallthrough;
 		case INTEL_PT_TIP_PGE:
 		case INTEL_PT_TIP:
 			intel_pt_log("ERROR: Unexpected packet\n");
@@ -1762,6 +1764,8 @@ static int intel_pt_walk_psb(struct inte
 			decoder->pge = false;
 			decoder->continuous_period = false;
 			intel_pt_clear_tx_flags(decoder);
+			__fallthrough;
+
 		case INTEL_PT_TNT:
 			decoder->have_tma = false;
 			intel_pt_log("ERROR: Unexpected packet\n");
@@ -1802,6 +1806,7 @@ static int intel_pt_walk_to_ip(struct in
 		switch (decoder->packet.type) {
 		case INTEL_PT_TIP_PGD:
 			decoder->continuous_period = false;
+			__fallthrough;
 		case INTEL_PT_TIP_PGE:
 		case INTEL_PT_TIP:
 			decoder->pge = decoder->packet.type != INTEL_PT_TIP_PGD;
--- a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
@@ -17,6 +17,7 @@
 #include <string.h>
 #include <endian.h>
 #include <byteswap.h>
+#include <linux/compiler.h>
 
 #include "intel-pt-pkt-decoder.h"
 
@@ -488,6 +489,7 @@ int intel_pt_pkt_desc(const struct intel
 	case INTEL_PT_FUP:
 		if (!(packet->count))
 			return snprintf(buf, buf_len, "%s no ip", name);
+		__fallthrough;
 	case INTEL_PT_CYC:
 	case INTEL_PT_VMCS:
 	case INTEL_PT_MTC:


Patches currently in stable-queue which might be from acme@redhat.com are

queue-4.4/perf-tools-use-readdir-instead-of-deprecated-readdir_r.patch
queue-4.4/perf-thread_map-correctly-size-buffer-used-with-dirent-dt_name.patch
queue-4.4/perf-tests-remove-wrong-semicolon-in-while-loop-in-cqm-test.patch
queue-4.4/perf-annotate-browser-fix-behaviour-of-shift-tab-with-nothing-focussed.patch
queue-4.4/perf-tests-avoid-possible-truncation-with-dirent-d_name-snprintf.patch
queue-4.4/perf-top-use-__fallthrough.patch
queue-4.4/perf-scripting-perl-fix-compile-error-with-some-perl5-versions.patch
queue-4.4/perf-bench-numa-avoid-possible-truncation-when-using-snprintf.patch
queue-4.4/perf-tools-use-readdir-instead-of-deprecated-readdir_r-again.patch
queue-4.4/perf-thread_map-use-readdir-instead-of-deprecated-readdir_r.patch
queue-4.4/perf-tools-remove-duplicate-const-qualifier.patch
queue-4.4/tools-string-use-__fallthrough-in-perf_atoll.patch
queue-4.4/perf-intel-pt-use-__fallthrough.patch
queue-4.4/perf-script-use-readdir-instead-of-deprecated-readdir_r.patch
queue-4.4/tools-include-add-a-__fallthrough-statement.patch
queue-4.4/tools-strfilter-use-__fallthrough.patch
queue-4.4/perf-dwarf-guard-x86_64-definitions-under-ifdef-else-clause.patch
queue-4.4/perf-pmu-fix-misleadingly-indented-assignment-whitespace.patch
queue-4.4/perf-trace-do-not-process-perf_record_lost-twice.patch