On Mon, 16 Sep 2013, Chen Gang wrote: > Hmm... I am not quite sure: a C compiler is clever enough to know about > that. > > At least, for ANSI C definition, the C compiler has no duty to know > about that. > > And it is not for an optimization, either, so I guess the C compiler has > no enought interests to support this features (know about that). > What on earth are we talking about in this thread? Rename mpol_to_str() to __mpol_to_str(). Make a static inline function in mempolicy.h named mpol_to_str(). That function does BUILD_BUG_ON(maxlen < 64) and then calls __mpol_to_str(). Modify __mpol_to_str() to store "unknown" when mpol->mode does not match any known MPOL_* constant. Both functions can now return void. This is like a ten line diff. Seriously. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>