Merge branch 'add-clippy' into 'master'

start adding some clippy lints to Cargo.toml

See merge request redox-os/relibc!963

Cargo.toml

@@ -19,6 +19,12 @@ members = [
 ]
 exclude = ["tests", "dlmalloc-rs"]
 
+[workspace.lints.clippy]
+ptr_cast_constness = "warn"
+
+[lints.clippy]
+ptr_cast_constness = "warn"
+
 [build-dependencies]
 cc = "1"
 

src/header/pthread/tls.rs

@@ -59,7 +59,7 @@ pub unsafe extern "C" fn pthread_setspecific(key: pthread_key_t, value: *const c
     });
     //println!("Valid key for pthread_setspecific key {:#0x} value {:p} (was {:p})", key, value, record.data);
 
-    record.data = value as *mut c_void;
+    record.data = value.cast_mut();
     0
 }
 

src/ld_so/debug.rs

@@ -108,7 +108,7 @@ impl LinkMap {
             (*map).l_addr = l_addr;
             (*map).l_ld = l_ld;
             let c_name = CString::new(name).unwrap();
-            (*map).l_name = c_name.into_raw() as *const c_char;
+            (*map).l_name = c_name.into_raw().cast_const();
         }
         map
     }