On Fri, Aug 07, 2020 at 08:08:10PM +0800, kernel test robot wrote: > sparse warnings: (new ones prefixed by >>) > > >> fs/erofs/zdata.c:198:22: sparse: sparse: non size-preserving integer to pointer cast > fs/erofs/zdata.c:282:22: sparse: sparse: non size-preserving integer to pointer cast > fs/erofs/zdata.c:1094:24: sparse: sparse: non size-preserving integer to pointer cast I don't think these are valid warnings.

All these three lines are using cmpxchg struct page * (which is equivalent to unsigned long in these cmpxchg macros) and nothing special at all in my opinion (Especially the last two lines).