linux-kernel - [PATCH 1/4] selftests: Fix kselftest O=objdir build from cluttering top level objdir

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Date:   Wed,  4 Mar 2020 15:13:32 -0700
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     shuah@...nel.org
Cc:     Shuah Khan <skhan@...uxfoundation.org>, khilman@...libre.com,
        mpe@...erman.id.au, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] selftests: Fix kselftest O=objdir build from cluttering top level objdir

make kselftest-all O=objdir builds create generated objects in objdir.
This clutters the top level directory with kselftest objects. Fix it
to create sub-directory under objdir for kselftest objects.

Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
---
 tools/testing/selftests/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 6ec503912bea..cd77df3e6bb8 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -91,7 +91,7 @@ override LDFLAGS =
 override MAKEFLAGS =
 endif
 
-# Append kselftest to KBUILD_OUTPUT to avoid cluttering
+# Append kselftest to KBUILD_OUTPUT and O to avoid cluttering
 # KBUILD_OUTPUT with selftest objects and headers installed
 # by selftests Makefile or lib.mk.
 ifdef building_out_of_srctree
@@ -99,7 +99,7 @@ override LDFLAGS =
 endif
 
 ifneq ($(O),)
-	BUILD := $(O)
+	BUILD := $(O)/kselftest
 else
 	ifneq ($(KBUILD_OUTPUT),)
 		BUILD := $(KBUILD_OUTPUT)/kselftest
-- 
2.20.1