[tip:perf/core] tools build: Fix perf_clean target

[tip-bot for Jiri Olsa]

Commit-ID:  ab362f5a95ff72a895c446e9d5ef548cac2fea07
Gitweb:     http://git.kernel.org/tip/ab362f5a95ff72a895c446e9d5ef548cac2fea07
Author:     Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Mon, 25 Apr 2016 22:17:18 +0200
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 25 Apr 2016 17:59:36 -0300

tools build: Fix perf_clean target

Fix perf_clean target to follow the same logic as perf target.

Fixes the following make invokation:

  $ cd <kernelsrc> && make tools/perf_clean

Reported-by: TJ <linux@xxxxxx>
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=116411
Link: http://lkml.kernel.org/r/1461615438-27894-2-git-send-email-jolsa@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/Makefile b/tools/Makefile
index 60c7e6c..6bf68fe 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -137,7 +137,8 @@ libsubcmd_clean:
 	$(call descend,lib/subcmd,clean)
 
 perf_clean:
-	$(call descend,$(@:_clean=),clean)
+	$(Q)mkdir -p $(PERF_O) .
+	$(Q)$(MAKE) --no-print-directory -C perf O=$(PERF_O) subdir= clean
 
 selftests_clean:
 	$(call descend,testing/$(@:_clean=),clean)