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From:   Boqun Feng <boqun.feng@gmail.com>
To:     Peter Zijlstra <peterz@infradead.org>
Cc:     Wedson Almeida Filho <wedsonaf@gmail.com>,
        rust-for-linux@vger.kernel.org, Miguel Ojeda <ojeda@kernel.org>,
        Alex Gaynor <alex.gaynor@gmail.com>,
        Boqun Feng <boqun.feng@gmail.com>, Gary Guo <gary@garyguo.net>,
        =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= <bjorn3_gh@protonmail.com>,
        linux-kernel@vger.kernel.org,
        Wedson Almeida Filho <walmeida@microsoft.com>,
        Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
        Waiman Long <longman@redhat.com>
Subject: [DRAFT 1/2] locking/selftest: Add test infrastructure for Rust locking APIs
Date:   Thu, 30 Mar 2023 11:51:02 -0700
Message-Id: <20230330185103.1444086-1-boqun.feng@gmail.com>
In-Reply-To: <ZCXZMNj7aOKbC7Ev@boqun-archlinux>
References: <ZCXZMNj7aOKbC7Ev@boqun-archlinux>
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Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
---
 MAINTAINERS                  |  1 +
 lib/Makefile                 |  3 +++
 lib/locking-selftest.c       |  9 +++++++++
 lib/rust_locking_selftest.rs | 12 ++++++++++++
 4 files changed, 25 insertions(+)
 create mode 100644 lib/rust_locking_selftest.rs

diff --git a/MAINTAINERS b/MAINTAINERS
index 8d5bc223f305..c1878e18f98a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12060,6 +12060,7 @@ F:	include/linux/seqlock.h
 F:	include/linux/spinlock*.h
 F:	kernel/locking/
 F:	lib/locking*.[ch]
+F:	lib/rust-locking-selftest.rs
 X:	kernel/locking/locktorture.c
 
 LOGICAL DISK MANAGER SUPPORT (LDM, Windows 2000/XP/Vista Dynamic Disks)
diff --git a/lib/Makefile b/lib/Makefile
index baf2821f7a00..940374c08edd 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -148,6 +148,9 @@ obj-$(CONFIG_GENERIC_PCI_IOMAP) += pci_iomap.o
 obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
 obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o
 obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
+ifdef CONFIG_RUST
+obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += rust_locking_selftest.o
+endif
 
 lib-y += logic_pio.o
 
diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index 8d24279fad05..9ef3ad92bc47 100644
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -2854,6 +2854,11 @@ static void hardirq_deadlock_softirq_not_deadlock(void)
 	HARDIRQ_ENABLE();
 }
 
+#ifdef CONFIG_RUST
+void rust_locking_test(void);
+#else
+#define rust_locking_test()
+#endif
 void locking_selftest(void)
 {
 	/*
@@ -3010,6 +3015,10 @@ void locking_selftest(void)
 		printk("---------------------------------\n");
 		debug_locks = 1;
 	}
+
+	/* Rust locking API tests */
+	rust_locking_test();
+
 	lockdep_set_selftest_task(NULL);
 	debug_locks_silent = 0;
 }
diff --git a/lib/rust_locking_selftest.rs b/lib/rust_locking_selftest.rs
new file mode 100644
index 000000000000..61560a2f3c6b
--- /dev/null
+++ b/lib/rust_locking_selftest.rs
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+
+//! Selftests for Rust locking APIs.
+
+use kernel::prelude::*;
+const __LOG_PREFIX: &[u8] = b"locking selftest\0";
+
+/// Entry point for tests.
+#[no_mangle]
+pub extern "C" fn rust_locking_test() {
+    pr_info!("Selftests for Rust locking APIs");
+}
-- 
2.39.2