linux-kernel - [PATCH 0/2] selftests: harness: refactor __constructor

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Message-Id: <20240517114506.1259203-1-masahiroy@kernel.org>
Date: Fri, 17 May 2024 20:45:04 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Kees Cook <keescook@...omium.org>,
	Andy Lutomirski <luto@...capital.net>,
	Will Drewry <wad@...omium.org>,
	linux-kselftest@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Masahiro Yamada <masahiroy@...nel.org>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Christian Borntraeger <borntraeger@...ux.ibm.com>,
	Claudio Imbrenda <imbrenda@...ux.ibm.com>,
	David Hildenbrand <david@...hat.com>,
	Janosch Frank <frankja@...ux.ibm.com>,
	Jiri Kosina <jikos@...nel.org>,
	Shuah Khan <shuah@...nel.org>,
	bpf@...r.kernel.org,
	kvm@...r.kernel.org,
	linux-input@...r.kernel.org,
	linux-rtc@...r.kernel.org
Subject: [PATCH 0/2] selftests: harness: refactor __constructor_order


This series refactors __constructor_order because
__constructor_order_last() is unneeded.

BTW, the comments in kselftest_harness.h was confusing to me.

As far as I tested, all arches executed constructors in the forward
order.

[test code]

  #include <stdio.h>

  static int x;

  static void __attribute__((constructor)) increment(void)
  {
           x += 1;
  }

  static void __attribute__((constructor)) multiply(void)
  {
          x *= 2;
  }

  int main(void)
  {
          printf("foo = %d\n", x);
          return 0;
  }

It should print 2 for forward order systems, 1 for reverse order systems.

I executed it on some archtes by using QEMU. I always got 2.



Masahiro Yamada (2):
  selftests: harness: remove unneeded __constructor_order_last()
  selftests: harness: rename __constructor_order for clarification

 .../drivers/s390x/uvdevice/test_uvdevice.c     |  6 ------
 tools/testing/selftests/hid/hid_bpf.c          |  6 ------
 tools/testing/selftests/kselftest_harness.h    | 18 ++++--------------
 tools/testing/selftests/rtc/rtctest.c          |  7 -------
 4 files changed, 4 insertions(+), 33 deletions(-)

-- 
2.40.1