Remove redundant alignment check (#314)

mpajkowski · web-flow · commit e8aee524f4ec · 2021-11-06T13:30:38.000Z
diff --git a/src/structures/paging/frame.rs b/src/structures/paging/frame.rs
@@ -24,7 +24,9 @@ impl<S: PageSize> PhysFrame<S> {
         if !address.is_aligned(S::SIZE) {
             return Err(AddressNotAligned);
         }
-        Ok(PhysFrame::containing_address(address))
+
+        // SAFETY: correct address alignment is checked above
+        Ok(unsafe { PhysFrame::from_start_address_unchecked(address) })
     }
 
     const_fn! {

Original file line number	Diff line number	Diff line change
`@@ -24,7 +24,9 @@ impl<S: PageSize> PhysFrame<S> {`
`24`	`24`	`if !address.is_aligned(S::SIZE) {`
`25`	`25`	`return Err(AddressNotAligned);`
`26`	`26`	`}`
`27`		`- Ok(PhysFrame::containing_address(address))`
	`27`	`+`
	`28`	`+ // SAFETY: correct address alignment is checked above`
	`29`	`+ Ok(unsafe { PhysFrame::from_start_address_unchecked(address) })`
`28`	`30`	`}`
`29`	`31`
`30`	`32`	`const_fn! {`