Re: [Qemu-devel] [PATCH v5 23/24] replay: add BH oneshot event for block layer

["Pavel Dovgalyuk" <dovgaluk@ispras.ru>]

> From: Alex Bennée [mailto:alex.bennee@linaro.org]
> > Replay is capable of recording normal BH events, but sometimes
> > there are single use callbacks scheduled with aio_bh_schedule_oneshot
> > function. This patch enables recording and replaying such callbacks.
> > Block layer uses these events for calling the completion function.
> > Replaying these calls makes the execution deterministic.
> >
> > Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
> 
> I'm not sure what about this commit causes the compile breakage I'm
> seeing:
> 
>   LINK    aarch64-linux-user/qemu-aarch64
> ../libqemuutil.a(cpu-get-icount.o):(.bss+0x0): multiple definition of `use_icount'
> exec.o:(.bss+0x58): first defined here
> collect2: error: ld returned 1 exit status
> Makefile:199: recipe for target 'qemu-aarch64' failed
> make[1]: *** [qemu-aarch64] Error 1
> Makefile:481: recipe for target 'subdir-aarch64-linux-user' failed
> make: *** [subdir-aarch64-linux-user] Error 2
> 
> It only occurs on a make clean && make -j on that commit though. It's
> hidden if you do incremental builds.

make distclean works for me in such cases.

Pavel Dovgalyuk