Rename Arena.setup to Arena.init

src/arena.zig

@@ -7,7 +7,7 @@ pub const Arena = struct {
     capacity: usize,
     len: usize,
 
-    pub fn setup(cap: usize) ?Arena {
+    pub fn init(cap: usize) ?Arena {
         const physBase = physMemory.alloc_pages(cap / mem.vmm.PAGE_SIZE) orelse return null;
         return .{
             .physBase = physBase,

src/kernel.zig

@@ -27,7 +27,7 @@ noinline fn f1(arg: usize, c: usize) void {
 
 pub export fn kernel_main() callconv(.C) noreturn {
     log.write("\x1B[2J", .{});
-    var a = arena.Arena.setup(256 * 0x1000) orelse @panic("Could not setup kernel arena");
+    var a = arena.Arena.init(256 * 0x1000) orelse @panic("Could not setup kernel arena");
     thread.Queue.initThisCpu(&a);
 
     const pc = @intFromPtr(&f0);