[PATCH 6.9 426/427] Revert "selftests: Compile kselftest headers with -D_GNU_SOURCE"

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

6.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>

[ Upstream commit cee27ae5f1fb8bc4762f5d5de19ec6de6c45e239 ]

This reverts commit daef47b89efd0b745e8478d69a3ad724bd8b4dc6.

This framework change to add D_GNU_SOURCE to KHDR_INCLUDES
to Makefile, lib.mk, and kselftest_harness.h is causing build
failures and warnings.

Revert this change.

Reported-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 tools/testing/selftests/Makefile            | 4 ++--
 tools/testing/selftests/kselftest_harness.h | 2 +-
 tools/testing/selftests/lib.mk              | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index ed012a7f07865..e1504833654db 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -161,11 +161,11 @@ ifneq ($(KBUILD_OUTPUT),)
   # $(realpath ...) resolves symlinks
   abs_objtree := $(realpath $(abs_objtree))
   BUILD := $(abs_objtree)/kselftest
-  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_objtree}/usr/include
+  KHDR_INCLUDES := -isystem ${abs_objtree}/usr/include
 else
   BUILD := $(CURDIR)
   abs_srctree := $(shell cd $(top_srcdir) && pwd)
-  KHDR_INCLUDES := -D_GNU_SOURCE -isystem ${abs_srctree}/usr/include
+  KHDR_INCLUDES := -isystem ${abs_srctree}/usr/include
   DEFAULT_INSTALL_HDR_PATH := 1
 endif
 
diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
index 37b03f1b8741d..3c8f2965c2850 100644
--- a/tools/testing/selftests/kselftest_harness.h
+++ b/tools/testing/selftests/kselftest_harness.h
@@ -51,7 +51,7 @@
 #define __KSELFTEST_HARNESS_H
 
 #ifndef _GNU_SOURCE
-static_assert(0, "kselftest harness requires _GNU_SOURCE to be defined");
+#define _GNU_SOURCE
 #endif
 #include <asm/types.h>
 #include <ctype.h>
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 7fa4a96e26ed6..8ae203d8ed7fa 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -53,7 +53,7 @@ selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
 top_srcdir = $(selfdir)/../../..
 
 ifeq ($(KHDR_INCLUDES),)
-KHDR_INCLUDES := -D_GNU_SOURCE -isystem $(top_srcdir)/usr/include
+KHDR_INCLUDES := -isystem $(top_srcdir)/usr/include
 endif
 
 # The following are built by lib.mk common compile rules.
-- 
2.43.0