linux-kernel - [PATCH v2 1/7] kunit: test-bug.h: include `stddef.h` for `NULL`

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Message-ID: <20230718052752.1045248-2-ojeda@kernel.org>
Date:   Tue, 18 Jul 2023 07:27:46 +0200
From:   Miguel Ojeda <ojeda@...nel.org>
To:     David Gow <davidgow@...gle.com>,
        Brendan Higgins <brendan.higgins@...ux.dev>,
        Miguel Ojeda <ojeda@...nel.org>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Alex Gaynor <alex.gaynor@...il.com>
Cc:     Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Benno Lossin <benno.lossin@...ton.me>,
        Alice Ryhl <aliceryhl@...gle.com>,
        Andreas Hindborg <nmi@...aspace.dk>,
        kunit-dev@...glegroups.com, linux-kselftest@...r.kernel.org,
        rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
        patches@...ts.linux.dev
Subject: [PATCH v2 1/7] kunit: test-bug.h: include `stddef.h` for `NULL`

The header uses `NULL` in both `CONFIG_KUNIT=y` and `=n` cases,
but does not include it explicitly.

When `CONFIG_KUNIT=y`, the header is already getting included via
the other headers, so it is not a problem for users.

However, when `CONFIG_KUNIT=n`, it is not, and thus a user could hit
a build error when including `kunit/test-bug.h`, like we are doing
later in this series [1].

Thus include `linux/stddef.h`, and do so outside the `#if`, since it
is used in both cases.

Reported-by: Boqun Feng <boqun.feng@...il.com>
Closes: https://lore.kernel.org/rust-for-linux/ZJ8cNUW3oR2p+gL1@boqun-archlinux/ [1]
Signed-off-by: Miguel Ojeda <ojeda@...nel.org>
---
 include/kunit/test-bug.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/kunit/test-bug.h b/include/kunit/test-bug.h
index 30ca541b6ff2..47aa8f21ccce 100644
--- a/include/kunit/test-bug.h
+++ b/include/kunit/test-bug.h
@@ -9,6 +9,8 @@
 #ifndef _KUNIT_TEST_BUG_H
 #define _KUNIT_TEST_BUG_H
 
+#include <linux/stddef.h> /* for NULL */
+
 #if IS_ENABLED(CONFIG_KUNIT)
 
 #include <linux/jump_label.h> /* For static branch */
-- 
2.41.0