[PATCH v4 1/6] rust: inline some init methods

[Alexandre Courbot <acourbot@nvidia.com>]

These methods should be inlined for optimization reasons. Failure to do
so can also produce symbol names larger than what `modpost` or `objtool`
can handle.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
---
 rust/kernel/alloc/kbox.rs | 2 ++
 rust/kernel/init.rs       | 2 ++
 rust/kernel/sync/arc.rs   | 4 ++++
 3 files changed, 8 insertions(+)

diff --git a/rust/kernel/alloc/kbox.rs b/rust/kernel/alloc/kbox.rs
index 2f8c16473c2c..1264a8118aca 100644
--- a/rust/kernel/alloc/kbox.rs
+++ b/rust/kernel/alloc/kbox.rs
@@ -433,6 +433,7 @@ impl<T, A> InPlaceWrite<T> for Box<MaybeUninit<T>, A>
 {
     type Initialized = Box<T, A>;
 
+    #[inline]
     fn write_init<E>(mut self, init: impl Init<T, E>) -> Result<Self::Initialized, E> {
         let slot = self.as_mut_ptr();
         // SAFETY: When init errors/panics, slot will get deallocated but not dropped,
@@ -442,6 +443,7 @@ fn write_init<E>(mut self, init: impl Init<T, E>) -> Result<Self::Initialized, E
         Ok(unsafe { Box::assume_init(self) })
     }
 
+    #[inline]
     fn write_pin_init<E>(mut self, init: impl PinInit<T, E>) -> Result<Pin<Self::Initialized>, E> {
         let slot = self.as_mut_ptr();
         // SAFETY: When init errors/panics, slot will get deallocated but not dropped,
diff --git a/rust/kernel/init.rs b/rust/kernel/init.rs
index 7a0d4559d7b5..05a12e869a57 100644
--- a/rust/kernel/init.rs
+++ b/rust/kernel/init.rs
@@ -151,6 +151,7 @@ fn try_pin_init<E>(init: impl PinInit<T, E>, flags: Flags) -> Result<Self::Pinne
     /// type.
     ///
     /// If `T: !Unpin` it will not be able to move afterwards.
+    #[inline]
     fn pin_init<E>(init: impl PinInit<T, E>, flags: Flags) -> error::Result<Self::PinnedSelf>
     where
         Error: From<E>,
@@ -168,6 +169,7 @@ fn try_init<E>(init: impl Init<T, E>, flags: Flags) -> Result<Self, E>
         E: From<AllocError>;
 
     /// Use the given initializer to in-place initialize a `T`.
+    #[inline]
     fn init<E>(init: impl Init<T, E>, flags: Flags) -> error::Result<Self>
     where
         Error: From<E>,
diff --git a/rust/kernel/sync/arc.rs b/rust/kernel/sync/arc.rs
index 18d6c0d62ce0..feca07e8d13d 100644
--- a/rust/kernel/sync/arc.rs
+++ b/rust/kernel/sync/arc.rs
@@ -712,6 +712,7 @@ fn try_init<E>(init: impl Init<T, E>, flags: Flags) -> Result<Self, E>
 impl<T> InPlaceWrite<T> for UniqueArc<MaybeUninit<T>> {
     type Initialized = UniqueArc<T>;
 
+    #[inline]
     fn write_init<E>(mut self, init: impl Init<T, E>) -> Result<Self::Initialized, E> {
         let slot = self.as_mut_ptr();
         // SAFETY: When init errors/panics, slot will get deallocated but not dropped,
@@ -721,6 +722,7 @@ fn write_init<E>(mut self, init: impl Init<T, E>) -> Result<Self::Initialized, E
         Ok(unsafe { self.assume_init() })
     }
 
+    #[inline]
     fn write_pin_init<E>(mut self, init: impl PinInit<T, E>) -> Result<Pin<Self::Initialized>, E> {
         let slot = self.as_mut_ptr();
         // SAFETY: When init errors/panics, slot will get deallocated but not dropped,
@@ -782,6 +784,7 @@ pub unsafe fn assume_init(self) -> UniqueArc<T> {
     }
 
     /// Initialize `self` using the given initializer.
+    #[inline]
     pub fn init_with<E>(mut self, init: impl Init<T, E>) -> core::result::Result<UniqueArc<T>, E> {
         // SAFETY: The supplied pointer is valid for initialization.
         match unsafe { init.__init(self.as_mut_ptr()) } {
@@ -792,6 +795,7 @@ pub fn init_with<E>(mut self, init: impl Init<T, E>) -> core::result::Result<Uni
     }
 
     /// Pin-initialize `self` using the given pin-initializer.
+    #[inline]
     pub fn pin_init_with<E>(
         mut self,
         init: impl PinInit<T, E>,

-- 
2.54.0