Squash commits for public release

kernel/include/libkern/c_attrs.h

@@ -0,0 +1,24 @@
+#ifndef _KERNEL_LIBKERN_C_ATTRS_H
+#define _KERNEL_LIBKERN_C_ATTRS_H
+
+#ifndef PACKED
+#define PACKED __attribute__((packed))
+#endif // PACKED
+
+#ifndef MAYBE_UNUSED
+#define MAYBE_UNUSED __attribute__((__unused__))
+#endif // MAYBE_UNUSED
+
+#ifndef ALWAYS_INLINE
+#define ALWAYS_INLINE __attribute__((always_inline)) inline
+#endif // ALWAYS_INLINE
+
+#ifndef NORETURN
+#define NORETURN __attribute__((noreturn))
+#endif // NORETURN
+
+#ifndef WARN_UNUSED_RESULT
+#define WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
+#endif // WARN_UNUSED_RESULT
+
+#endif // _KERNEL_LIBKERN_C_ATTRS_H