[PATCH v2 2/6] rust: ptr: use `match` instead of `unwrap_or_else` for `build_index`

[Gary Guo]

Use `match` to avoid potential inlining issues of the `unwrap_or_else`
function.

Suggested-by: Alice Ryhl <aliceryhl@xxxxxxxxxx>
Link: https://lore.kernel.org/rust-for-linux/aeCKlut-88SbNsyW@xxxxxxxxxx/
Signed-off-by: Gary Guo <gary@xxxxxxxxxxx>
---
 rust/kernel/ptr/projection.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/rust/kernel/ptr/projection.rs b/rust/kernel/ptr/projection.rs
index fbe172e493c2..1b54616c6cbb 100644
--- a/rust/kernel/ptr/projection.rs
+++ b/rust/kernel/ptr/projection.rs
@@ -45,7 +45,10 @@ pub unsafe trait ProjectIndex<T: ?Sized>: Sized {
     /// Returns an index-projected pointer; fail the build if it cannot be proved to be in bounds.
     #[inline(always)]
     fn build_index(self, slice: *mut T) -> *mut Self::Output {
-        Self::get(self, slice).unwrap_or_else(|| build_error!())
+        match Self::get(self, slice) {
+            Some(v) => v,
+            None => build_error!(),
+        }
     }
 }
 

-- 
2.54.0