rust: init: update init module to take allocation flags

This is the last component in the conversion for allocators to take
allocation flags as parameters.

Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Signed-off-by: Wedson Almeida Filho <walmeida@microsoft.com>
Link: https://lore.kernel.org/r/20240328013603.206764-10-wedsonaf@gmail.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

rust/kernel/sync/arc.rs

@@ -182,22 +182,22 @@ impl<T> Arc<T> {
     ///
     /// If `T: !Unpin` it will not be able to move afterwards.
     #[inline]
-    pub fn pin_init<E>(init: impl PinInit<T, E>) -> error::Result<Self>
+    pub fn pin_init<E>(init: impl PinInit<T, E>, flags: Flags) -> error::Result<Self>
     where
         Error: From<E>,
     {
-        UniqueArc::pin_init(init).map(|u| u.into())
+        UniqueArc::pin_init(init, flags).map(|u| u.into())
     }
 
     /// Use the given initializer to in-place initialize a `T`.
     ///
     /// This is equivalent to [`Arc<T>::pin_init`], since an [`Arc`] is always pinned.
     #[inline]
-    pub fn init<E>(init: impl Init<T, E>) -> error::Result<Self>
+    pub fn init<E>(init: impl Init<T, E>, flags: Flags) -> error::Result<Self>
     where
         Error: From<E>,
     {
-        UniqueArc::init(init).map(|u| u.into())
+        UniqueArc::init(init, flags).map(|u| u.into())
     }
 }
 
@@ -565,13 +565,16 @@ impl<T> UniqueArc<T> {
     }
 
     /// Tries to allocate a new [`UniqueArc`] instance whose contents are not initialised yet.
-    pub fn new_uninit(_flags: Flags) -> Result<UniqueArc<MaybeUninit<T>>, AllocError> {
+    pub fn new_uninit(flags: Flags) -> Result<UniqueArc<MaybeUninit<T>>, AllocError> {
         // INVARIANT: The refcount is initialised to a non-zero value.
-        let inner = Box::try_init::<AllocError>(try_init!(ArcInner {
-            // SAFETY: There are no safety requirements for this FFI call.
-            refcount: Opaque::new(unsafe { bindings::REFCOUNT_INIT(1) }),
-            data <- init::uninit::<T, AllocError>(),
-        }? AllocError))?;
+        let inner = Box::try_init::<AllocError>(
+            try_init!(ArcInner {
+                // SAFETY: There are no safety requirements for this FFI call.
+                refcount: Opaque::new(unsafe { bindings::REFCOUNT_INIT(1) }),
+                data <- init::uninit::<T, AllocError>(),
+            }? AllocError),
+            flags,
+        )?;
         Ok(UniqueArc {
             // INVARIANT: The newly-created object has a refcount of 1.
             // SAFETY: The pointer from the `Box` is valid.

rust/kernel/sync/condvar.rs

@@ -75,7 +75,7 @@ pub use new_condvar;
 ///     Box::pin_init(pin_init!(Example {
 ///         value <- new_mutex!(0),
 ///         value_changed <- new_condvar!(),
-///     }))
+///     }), GFP_KERNEL)
 /// }
 /// ```
 ///

rust/kernel/sync/lock/mutex.rs

@@ -60,7 +60,7 @@ pub use new_mutex;
 /// }
 ///
 /// // Allocate a boxed `Example`.
-/// let e = Box::pin_init(Example::new())?;
+/// let e = Box::pin_init(Example::new(), GFP_KERNEL)?;
 /// assert_eq!(e.c, 10);
 /// assert_eq!(e.d.lock().a, 20);
 /// assert_eq!(e.d.lock().b, 30);

rust/kernel/sync/lock/spinlock.rs

@@ -58,7 +58,7 @@ pub use new_spinlock;
 /// }
 ///
 /// // Allocate a boxed `Example`.
-/// let e = Box::pin_init(Example::new())?;
+/// let e = Box::pin_init(Example::new(), GFP_KERNEL)?;
 /// assert_eq!(e.c, 10);
 /// assert_eq!(e.d.lock().a, 20);
 /// assert_eq!(e.d.lock().b, 30);