On Tue, Jun 8, 2021 at 12:35 PM Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > [...] > > Anyway, this is a false positive. You don't have to check the return > value. The main example of doing so is the page-out code in > mm/vmscan.c, and it does so just to keep track of success/fail > statistics. BTW there is an in-fly patch to make the try_to_umap() void function. https://lore.kernel.org/lkml/alpine.LSU.2.11.2106031527070.11704@eggly.anvils/