Patch "tools include: Add a __fallthrough statement" has been added to the 4.4-stable tree

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

tools include: Add a __fallthrough statement

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:
tools-include-add-a-__fallthrough-statement.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 <[email protected]> know about it.

From: Arnaldo Carvalho de Melo <[email protected]>
Date: Wed, 8 Feb 2017 17:01:46 -0300
Subject: tools include: Add a __fallthrough statement

From: Arnaldo Carvalho de Melo <[email protected]>

commit b5bf1733d6a391c4e90ea8f8468d83023be74a2a upstream.

For cases where implicit fall through case labels are intended, to let us inform that to gcc >= 7:

CC /tmp/build/perf/util/string.o
util/string.c: In function 'perf_atoll':
util/string.c:22:7: error: this statement may fall through [-Werror=implicit-fallthrough=]

      if (*p)
         ^
  util/string.c:24:3: note: here
     case '\0':
     ^~~~

So we introduce:

  #define __fallthrough __attribute__ ((fallthrough))

And use it in such cases.

---
 tools/include/linux/compiler.h |    9 +++++++++
 1 file changed, 9 insertions(+)

@@ -115,4 +115,13 @@ static __always_inline void __write_once
 #define WRITE_ONCE(x, val) \
 	({ union { typeof(x) __val; char __c[1]; } __u = { .__val = (val) }; __write_once_size(&(x), __u.__c, sizeof(x)); __u.__val; })
 
+
+#ifndef __fallthrough
+# if defined(__GNUC__) && __GNUC__ >= 7
+#  define __fallthrough __attribute__ ((fallthrough))
+# else
+#  define __fallthrough
+# endif
+#endif
+
 #endif /* _TOOLS_LINUX_COMPILER_H */

Patches currently in stable-queue which might be from [email protected] 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