On 5/4/20 2:12 AM, David Binderman wrote: > Hello there, > > linux-5.7-rc4/fs/io_uring.c:2786:6: warning: Identical condition > 'force_nonblock', second condition is always false > [identicalConditionAfterEarlyExit] > > Source code is > > if (force_nonblock) > return -EAGAIN; > > poff_in = (sp->off_in == -1) ? NULL : &sp->off_in; > poff_out = (sp->off_out == -1) ? NULL : &sp->off_out; > ret = do_splice(in, poff_in, out, poff_out, sp->len, flags); > if (force_nonblock && ret == -EAGAIN) > return -EAGAIN; > > So the second return can never execute. Suggest code rework.
Looks like that's a leftover of the "only punt sometimes" code. That second one is indeed dead now, Pavel is re-working the async punt for 5.8 anyway so I don't think it's worth touching at this point. -- Jens Axboe
