fix clippy warnings

Author: Freax13

src/registers/segmentation.rs

@@ -76,7 +76,7 @@ impl SegmentSelector {
     ///  * `rpl`: the requested privilege level
     #[inline]
     pub const fn new(index: u16, rpl: PrivilegeLevel) -> SegmentSelector {
-        SegmentSelector(index << 3 | (rpl as u16))
+        SegmentSelector((index << 3) | (rpl as u16))
     }
 
     /// Can be used as a selector into a non-existent segment and assigned to segment registers,

src/registers/xcontrol.rs

@@ -73,7 +73,7 @@ mod x86_64 {
                     out("rax") low, out("rdx") high,
                     options(nomem, nostack, preserves_flags),
                 );
-                (high as u64) << 32 | (low as u64)
+                ((high as u64) << 32) | (low as u64)
             }
         }
 

src/structures/idt.rs

@@ -844,8 +844,8 @@ impl<F> Entry<F> {
     #[inline]
     pub fn handler_addr(&self) -> VirtAddr {
         let addr = self.pointer_low as u64
-            | (self.pointer_middle as u64) << 16
-            | (self.pointer_high as u64) << 32;
+            | ((self.pointer_middle as u64) << 16)
+            | ((self.pointer_high as u64) << 32);
         // addr is a valid VirtAddr, as the pointer members are either all zero,
         // or have been set by set_handler_addr (which takes a VirtAddr).
         VirtAddr::new_truncate(addr)