Messages in this thread | | | Date | Sat, 4 Aug 2018 14:19:51 -0400 | From | Mike Snitzer <> | Subject | Re: LVM snapshot broke between 4.14 and 4.16 |
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On Sat, Aug 04 2018 at 1:04pm -0400, Linus Torvalds <torvalds@linux-foundation.org> wrote:
> On Sat, Aug 4, 2018 at 3:03 AM WGH <wgh@torlan.ru> wrote: > > > > > > > The patch works for me. > > > > However, there's no text messsage in the kernel log, just a traceback. I > > think that's because WARN_ONCE is supposed to take condition as a first > > argument. > > Duh. > > It needs to be WARN_ONCE(1, ...); > > I obviously didn't test that patch, but I _did_ compile it. I wonder > why I didn't get a compiler warning for it... > > [ Goes off and looks ] > > Oh, because the "bio_devname(bio, b)" argument ended up being > interpreted as the format string, and since it was a dynamic string > the compiler felt it was all fine. Just bad luck. > > Anyway, just out of curiosity, what was the traceback? > > I'm not entirely happy with that patch either (even after the obvious > fix to add the "1" argument), but it does seem like the minimal > temporary workaround for now.
I agree.
Please feel free to add my:
Acked-by: Mike Snitzer <snitzer@redhat.com>
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