[RFC RESEND v10 13/14] rust: sync: lock/global: Add BackendInContext support to GlobalLock

[Lyude Paul]

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@xxxxxxxxxx>
---
 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 1678655faae32..108b15f4466f5 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<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<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`].
-- 
2.49.0