build: fix compile errors and update zonfig

build.zig.zon

@@ -13,8 +13,8 @@
             .hash = "N-V-__8AAAAAjAwsopZIlbp4U6NN1Eh573uVdLTwl1mkFUug",
         },
         .zonfig = .{
-            .url = "git+https://github.com/rdmsr/zonfig?ref=HEAD#68bab32af493cfec5ba1b203da891f14e149f7fb",
-            .hash = "zonfig-0.1.0-V0D8-UFHAQD9A7pelklsfOdK0hcehKPxMQtTFrK3EUzW",
+            .url = "git+https://github.com/rdmsr/zonfig?ref=HEAD#92ac3f6cff20f2e3282b4cbece0e0ac6d3d51798",
+            .hash = "zonfig-0.1.0-V0D8-VdHAQCsN0dUSP1vkMWr0BDHl1pcAsMbtzGS5uB-",
         },
     },
 

src/kern/cpu.zig

@@ -75,7 +75,7 @@ pub const CpuMask = struct {
 
     /// Return an empty `CpuMask`.
     pub fn empty() CpuMask {
-        return CpuMask{ .bits = [_]usize{0} ** num_words };
+        return CpuMask{ .bits = @splat(0) };
     }
 
     /// Set the bit corresponding to `cpu_id`.