[tip:perf/core] perf version: Append 12 git SHA chars to the version string

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  80ec26d110c5c5a81b60c444db851e5734dee09a
Gitweb:     https://git.kernel.org/tip/80ec26d110c5c5a81b60c444db851e5734dee09a
Author:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Fri, 24 May 2019 15:50:18 -0300
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 28 May 2019 18:37:44 -0300

perf version: Append 12 git SHA chars to the version string

Bumping it from just 4:

Before:

  $ perf -v
  perf version 5.2.rc1.g80978f
  $

After:

  $ perf -v
  perf version 5.2.rc1.g80978fc864c5
  $

Requested-by: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-p4yun2nxlo7eeeohyx5v4kw7@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/PERF-VERSION-GEN | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/PERF-VERSION-GEN b/tools/perf/util/PERF-VERSION-GEN
index 3802cee5e188..59241ff342be 100755
--- a/tools/perf/util/PERF-VERSION-GEN
+++ b/tools/perf/util/PERF-VERSION-GEN
@@ -19,7 +19,7 @@ TAG=
 if test -d ../../.git -o -f ../../.git
 then
 	TAG=$(git describe --abbrev=0 --match "v[0-9].[0-9]*" 2>/dev/null )
-	CID=$(git log -1 --abbrev=4 --pretty=format:"%h" 2>/dev/null) && CID="-g$CID"
+	CID=$(git log -1 --abbrev=12 --pretty=format:"%h" 2>/dev/null) && CID="-g$CID"
 elif test -f ../../PERF-VERSION-FILE
 then
 	TAG=$(cut -d' ' -f3 ../../PERF-VERSION-FILE | sed -e 's/\"//g')