1 files changed, 12 insertions, 4 deletions
diff --git a/src/sched.rs b/src/sched.rs
index 064deb8c..3b48b4ad 100644
--- a/src/sched.rs
+++ b/src/sched.rs
@@ -80,7 +80,8 @@ mod sched_linux_like {
             if field >= CpuSet::count() {
                 Err(Error::Sys(Errno::EINVAL))
             } else {
-                Ok(unsafe { libc::CPU_SET(field, &mut self.cpu_set) })
+                unsafe { libc::CPU_SET(field, &mut self.cpu_set); }
+                Ok(())
             }
         }
 
@@ -90,7 +91,8 @@ mod sched_linux_like {
             if field >= CpuSet::count() {
                 Err(Error::Sys(Errno::EINVAL))
             } else {
-                Ok(unsafe { libc::CPU_CLR(field, &mut self.cpu_set) })
+                unsafe { libc::CPU_CLR(field, &mut self.cpu_set);}
+                Ok(())
             }
         }
 
@@ -100,6 +102,12 @@ mod sched_linux_like {
         }
     }
 
+    impl Default for CpuSet {
+        fn default() -> Self {
+            Self::new()
+        }
+    }
+
     /// `sched_setaffinity` set a thread's CPU affinity mask
     /// ([`sched_setaffinity(2)`](http://man7.org/linux/man-pages/man2/sched_setaffinity.2.html))
     ///
@@ -181,8 +189,8 @@ mod sched_linux_like {
 
         let res = unsafe {
             let combined = flags.bits() | signal.unwrap_or(0);
-            let ptr = stack.as_mut_ptr().offset(stack.len() as isize);
-            let ptr_aligned = ptr.offset((ptr as usize % 16) as isize * -1);
+            let ptr = stack.as_mut_ptr().add(stack.len());
+            let ptr_aligned = ptr.sub(ptr as usize % 16);
             libc::clone(
                 mem::transmute(
                     callback as extern "C" fn(*mut Box<dyn FnMut() -> isize>) -> i32,