[PATCH v14 15/16] rust: sync: lock/global: Add BackendInContext support to GlobalLock
From: Lyude Paul <lyude@redhat.com>
Date: 2025-11-20 21:48:21
Also in:
rust-for-linux
Subsystem:
locking primitives, rust, the rest · Maintainers:
Peter Zijlstra, Ingo Molnar, Will Deacon, Boqun Feng, Miguel Ojeda, Linus Torvalds
Now that we have the ability to provide an explicit lifetime for a GlobalGuard and an explicit Backend for a GlobalGuard, we can finally implement lock_with() and try_lock_with(). Signed-off-by: Lyude Paul <lyude@redhat.com> --- rust/kernel/sync/lock/global.rs | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+)
diff --git a/rust/kernel/sync/lock/global.rs b/rust/kernel/sync/lock/global.rs
index 31264b68086b3..20fbe11d1a04b 100644
--- a/rust/kernel/sync/lock/global.rs
+++ b/rust/kernel/sync/lock/global.rs@@ -89,6 +89,34 @@ pub fn try_lock(&'static self) -> Option<GlobalGuard<'static, G, G::Backend>> { inner: self.inner.try_lock()?, }) } + + /// Lock this global lock with the provided `context`. + pub fn lock_with<'a, B>( + &'static self, + context: <G::Backend as Backend>::Context<'a>, + ) -> GlobalGuard<'a, G, B> + where + G::Backend: Backend<BackendInContext = B>, + B: Backend, + { + GlobalGuard { + inner: self.inner.lock_with(context), + } + } + + /// Try to lock this global lock with the provided `context`. + pub fn try_lock_with<'a, B>( + &'static self, + context: <G::Backend as Backend>::Context<'a>, + ) -> Option<GlobalGuard<'a, G, B>> + where + G::Backend: Backend<BackendInContext = B>, + B: Backend, + { + Some(GlobalGuard { + inner: self.inner.try_lock_with(context)?, + }) + } } /// A guard for a [`GlobalLock`].
--
2.51.1