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([102.44.245.127]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49fe5de4de4sm246200495e9.8.2026.09.26.10.33.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 26 Sep 2026 10:33:26 -0700 (PDT) From: Mohamed Osama To: ojeda@kernel.org Cc: boqun@kernel.org, gary@garyguo.net, bjorn3_gh@protonmail.com, lossin@kernel.org, a.hindborg@kernel.org, aliceryhl@google.com, tmgross@umich.edu, dakr@kernel.org, daniel.almeida@collabora.com, tamird@kernel.org, acourbot@nvidia.com, work@onurozkan.dev, longman@redhat.com, lyude@redhat.com, linux-block@vger.kernel.org, linux-serial@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 5/5] rust: sync: lock: use DropGuard Date: Sat, 26 Sep 2026 20:33:15 +0300 Message-ID: <20260926173315.56772-6-mohamed.osama189110@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260926173315.56772-1-mohamed.osama189110@gmail.com> References: <20260926173315.56772-1-mohamed.osama189110@gmail.com> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Replace the ScopeGuard usage in the Rust locking implementation with DropGuard. The guard preserves the existing scope-exit cleanup behavior while using the DropGuard API from the Rust kernel memory module. Signed-off-by: Mohamed Osama --- rust/kernel/sync/lock.rs | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/rust/kernel/sync/lock.rs b/rust/kernel/sync/lock.rs index 10b6b5e9b024..15f9cbe76c8d 100644 --- a/rust/kernel/sync/lock.rs +++ b/rust/kernel/sync/lock.rs @@ -7,8 +7,9 @@ use super::LockClassKey; use crate::{ + mem::DropGuard, str::{CStr, CStrExt as _}, - types::{NotThreadSafe, Opaque, ScopeGuard}, + types::{NotThreadSafe, Opaque}, }; use core::{cell::UnsafeCell, marker::PhantomPinned, pin::Pin}; use pin_init::{pin_data, pin_init, PinInit, Wrapper}; @@ -242,7 +243,7 @@ pub(crate) fn do_unlocked(&mut self, cb: impl FnOnce() -> U) -> U { // SAFETY: The caller owns the lock, so it is safe to unlock it. unsafe { B::unlock(self.lock.state.get(), &self.state) }; - let _relock = ScopeGuard::new(|| + let _relock = DropGuard::new((), |_| // SAFETY: The lock was just unlocked above and is being relocked now. unsafe { B::relock(self.lock.state.get(), &mut self.state) }); -- 2.43.0