address: rename Address::checked_offset() to checked_add()

Since we have checked_sub() mirroring the method on int types, be
consistent and rename checked_offset() to checked_add() to match the
int types as well.

Signed-off-by: Carlos López <[email protected]>

src/address.rs

@@ -55,7 +55,7 @@ pub trait Address:
         self.is_aligned(PAGE_SIZE)
     }
 
-    fn checked_offset(&self, off: InnerAddr) -> Option<Self> {
+    fn checked_add(&self, off: InnerAddr) -> Option<Self> {
         self.bits().checked_add(off).map(|addr| addr.into())
     }
 
@@ -262,7 +262,7 @@ impl ops::Add<InnerAddr> for VirtAddr {
 }
 
 impl Address for VirtAddr {
-    fn checked_offset(&self, off: InnerAddr) -> Option<Self> {
+    fn checked_add(&self, off: InnerAddr) -> Option<Self> {
         self.bits()
             .checked_add(off)
             .map(|addr| sign_extend(addr).into())

src/debug/stacktrace.rs

@@ -26,7 +26,7 @@ struct StackBounds {
 #[cfg(feature = "enable-stacktrace")]
 impl StackBounds {
     fn range_is_on_stack(&self, begin: VirtAddr, len: usize) -> bool {
-        match begin.checked_offset(len) {
+        match begin.checked_add(len) {
             Some(end) => begin >= self.bottom && end <= self.top,
             None => false,
         }

src/utils/memory_region.rs

@@ -38,7 +38,7 @@ where
     /// assert!(region.is_none());
     /// ```
     pub fn checked_new(start: A, len: usize) -> Option<Self> {
-        let end = start.checked_offset(len)?;
+        let end = start.checked_add(len)?;
         Some(Self { start, end })
     }