[PATCH v12 10/15] rust: sync: lock/global: Rename B to G in trait bounds

[Lyude Paul <lyude@redhat.com>]

Due to the introduction of Backend::BackendInContext, if we want to be able
support Lock types with a Context we need to be able to handle the fact
that the Backend for a returned Guard may not exactly match the Backend for
the lock. Before we add this though, rename B to G in all of our trait
bounds to make sure things don't become more difficult to understand once
we add a Backend bound.

There should be no functional changes in this patch.

Signed-off-by: Lyude Paul <lyude@redhat.com>
---
 rust/kernel/sync/lock/global.rs | 56 ++++++++++++++++-----------------
 1 file changed, 28 insertions(+), 28 deletions(-)

diff --git a/rust/kernel/sync/lock/global.rs b/rust/kernel/sync/lock/global.rs
index 47e200b750c1d..dfdd913d6c1f5 100644
--- a/rust/kernel/sync/lock/global.rs
+++ b/rust/kernel/sync/lock/global.rs
@@ -33,18 +33,18 @@ pub trait GlobalLockBackend {
 /// Type used for global locks.
 ///
 /// See [`global_lock!`] for examples.
-pub struct GlobalLock<B: GlobalLockBackend> {
-    inner: Lock<B::Item, B::Backend>,
+pub struct GlobalLock<G: GlobalLockBackend> {
+    inner: Lock<G::Item, G::Backend>,
 }
 
-impl<B: GlobalLockBackend> GlobalLock<B> {
+impl<G: GlobalLockBackend> GlobalLock<G> {
     /// Creates a global lock.
     ///
     /// # Safety
     ///
     /// * Before any other method on this lock is called, [`Self::init`] must be called.
-    /// * The type `B` must not be used with any other lock.
-    pub const unsafe fn new(data: B::Item) -> Self {
+    /// * The type `G` must not be used with any other lock.
+    pub const unsafe fn new(data: G::Item) -> Self {
         Self {
             inner: Lock {
                 state: Opaque::uninit(),
@@ -68,23 +68,23 @@ pub unsafe fn init(&'static self) {
         // `init` before using any other methods. As `init` can only be called once, all other
         // uses of this lock must happen after this call.
         unsafe {
-            B::Backend::init(
+            G::Backend::init(
                 self.inner.state.get(),
-                B::NAME.as_char_ptr(),
-                B::get_lock_class().as_ptr(),
+                G::NAME.as_char_ptr(),
+                G::get_lock_class().as_ptr(),
             )
         }
     }
 
     /// Lock this global lock.
-    pub fn lock(&'static self) -> GlobalGuard<B> {
+    pub fn lock(&'static self) -> GlobalGuard<G> {
         GlobalGuard {
             inner: self.inner.lock(),
         }
     }
 
     /// Try to lock this global lock.
-    pub fn try_lock(&'static self) -> Option<GlobalGuard<B>> {
+    pub fn try_lock(&'static self) -> Option<GlobalGuard<G>> {
         Some(GlobalGuard {
             inner: self.inner.try_lock()?,
         })
@@ -94,19 +94,19 @@ pub fn try_lock(&'static self) -> Option<GlobalGuard<B>> {
 /// A guard for a [`GlobalLock`].
 ///
 /// See [`global_lock!`] for examples.
-pub struct GlobalGuard<B: GlobalLockBackend> {
-    inner: Guard<'static, B::Item, B::Backend>,
+pub struct GlobalGuard<G: GlobalLockBackend> {
+    inner: Guard<'static, G::Item, G::Backend>,
 }
 
-impl<B: GlobalLockBackend> core::ops::Deref for GlobalGuard<B> {
-    type Target = B::Item;
+impl<G: GlobalLockBackend> core::ops::Deref for GlobalGuard<G> {
+    type Target = G::Item;
 
     fn deref(&self) -> &Self::Target {
         &self.inner
     }
 }
 
-impl<B: GlobalLockBackend> core::ops::DerefMut for GlobalGuard<B> {
+impl<G: GlobalLockBackend> core::ops::DerefMut for GlobalGuard<G> {
     fn deref_mut(&mut self) -> &mut Self::Target {
         &mut self.inner
     }
@@ -115,33 +115,33 @@ fn deref_mut(&mut self) -> &mut Self::Target {
 /// A version of [`LockedBy`] for a [`GlobalLock`].
 ///
 /// See [`global_lock!`] for examples.
-pub struct GlobalLockedBy<T: ?Sized, B: GlobalLockBackend> {
-    _backend: PhantomData<B>,
+pub struct GlobalLockedBy<T: ?Sized, G: GlobalLockBackend> {
+    _backend: PhantomData<G>,
     value: UnsafeCell<T>,
 }
 
 // SAFETY: The same thread-safety rules as `LockedBy` apply to `GlobalLockedBy`.
-unsafe impl<T, B> Send for GlobalLockedBy<T, B>
+unsafe impl<T, G> Send for GlobalLockedBy<T, G>
 where
     T: ?Sized,
-    B: GlobalLockBackend,
-    LockedBy<T, B::Item>: Send,
+    G: GlobalLockBackend,
+    LockedBy<T, G::Item>: Send,
 {
 }
 
 // SAFETY: The same thread-safety rules as `LockedBy` apply to `GlobalLockedBy`.
-unsafe impl<T, B> Sync for GlobalLockedBy<T, B>
+unsafe impl<T, G> Sync for GlobalLockedBy<T, G>
 where
     T: ?Sized,
-    B: GlobalLockBackend,
-    LockedBy<T, B::Item>: Sync,
+    G: GlobalLockBackend,
+    LockedBy<T, G::Item>: Sync,
 {
 }
 
-impl<T, B: GlobalLockBackend> GlobalLockedBy<T, B> {
+impl<T, G: GlobalLockBackend> GlobalLockedBy<T, G> {
     /// Create a new [`GlobalLockedBy`].
     ///
-    /// The provided value will be protected by the global lock indicated by `B`.
+    /// The provided value will be protected by the global lock indicated by `G`.
     pub fn new(val: T) -> Self {
         Self {
             value: UnsafeCell::new(val),
@@ -150,11 +150,11 @@ pub fn new(val: T) -> Self {
     }
 }
 
-impl<T: ?Sized, B: GlobalLockBackend> GlobalLockedBy<T, B> {
+impl<T: ?Sized, G: GlobalLockBackend> GlobalLockedBy<T, G> {
     /// Access the value immutably.
     ///
     /// The caller must prove shared access to the lock.
-    pub fn as_ref<'a>(&'a self, _guard: &'a GlobalGuard<B>) -> &'a T {
+    pub fn as_ref<'a>(&'a self, _guard: &'a GlobalGuard<G>) -> &'a T {
         // SAFETY: The lock is globally unique, so there can only be one guard.
         unsafe { &*self.value.get() }
     }
@@ -162,7 +162,7 @@ pub fn as_ref<'a>(&'a self, _guard: &'a GlobalGuard<B>) -> &'a T {
     /// Access the value mutably.
     ///
     /// The caller must prove shared exclusive to the lock.
-    pub fn as_mut<'a>(&'a self, _guard: &'a mut GlobalGuard<B>) -> &'a mut T {
+    pub fn as_mut<'a>(&'a self, _guard: &'a mut GlobalGuard<G>) -> &'a mut T {
         // SAFETY: The lock is globally unique, so there can only be one guard.
         unsafe { &mut *self.value.get() }
     }
-- 
2.50.0