[PATCH 2/2] tools build: Fix perf_clean target

[Jiri Olsa]

Fixig perf_clean target to follow the same logic as
perf target, it fixes following make invokation:

  $ cd <kernelsrc> && make tools/perf_clean

Reported-by: TJ <linux@xxxxxx>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=116411
Link: http://lkml.kernel.org/n/tip-79ja8qxlyrqkfx5h0ndnffl0@xxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
 tools/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/Makefile b/tools/Makefile
index 60c7e6c8ff17..6bf68fe7dd29 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)
-- 
2.4.11