linux-kernel - [PATCH] rust: add helper for mutex

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Message-ID: <20250528083431.1875345-1-pbonzini@redhat.com>
Date: Wed, 28 May 2025 10:34:30 +0200
From: Paolo Bonzini <pbonzini@...hat.com>
To: linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
Cc: rust-for-linux@...r.kernel.org,
	ojeda@...nel.org,
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: [PATCH] rust: add helper for mutex_trylock

After commit c5b6ababd21a ("locking/mutex: implement mutex_trylock_nested",
currently in the KVM tree) mutex_trylock() will be a macro when lockdep is
enabled.  Rust therefore needs the corresponding helper.  Just add it and
the rust/bindings/bindings_helpers_generated.rs Makefile rules will do
their thing.

Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
        Ok to apply to the KVM tree?

 rust/helpers/mutex.c                               |   5 +++++
 1 files changed, 5 insertions(+)

diff a/rust/helpers/mutex.c b/rust/helpers/mutex.c
index 06575553eda5,06575553eda5..9ab29104bee1
--- a/rust/helpers/mutex.c
+++ b/rust/helpers/mutex.c
@@ -7,6 +7,11 @@ void rust_helper_mutex_lock(struct mute
 	mutex_lock(lock);
 }
 
+int rust_helper_mutex_trylock(struct mutex *lock)
+{
+	return mutex_trylock(lock);
+}
+
 void rust_helper___mutex_init(struct mutex *mutex, const char *name,
 			      struct lock_class_key *key)
 {