On Tue, May 5, 2020 at 4:58 PM Arnd Bergmann <a...@arndb.de> wrote: > > Clang normally does not warn about certain issues in inline functions when > it only happens in an eliminated code path. However if something else > goes wrong, it does tend to complain about the definition of hweight_long() > on 32-bit targets:
Shouldn't it be fixed in CLang? > include/linux/bitops.h:75:41: error: shift count >= width of type > [-Werror,-Wshift-count-overflow] > return sizeof(w) == 4 ? hweight32(w) : hweight64(w); > ^~~~~~~~~~~~ sizeof(w) is compile-time constant. It can easily drop the second part without even looking at it. > Adding an explicit cast to __u64 avoids that warning and makes it easier > to read other output. Looks like papering over the real issue. -- With Best Regards, Andy Shevchenko