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Re: [Qemu-devel] [PATCH] rcutorture: fix compilation on 32-bit ppc


From: Andreas Färber
Subject: Re: [Qemu-devel] [PATCH] rcutorture: fix compilation on 32-bit ppc
Date: Sat, 21 Mar 2015 17:42:42 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0

Am 21.03.2015 um 16:34 schrieb Paolo Bonzini:
> 32-bit PPC cannot do atomic operations on long long.  Inside the loops,
> we are already using local counters that are summed at the end of
> the run---with one exception in rcu_read_stress_test: fix it to use
> the same technique.  Then, use a mutex to protect the global counts.
> Performance does not matter there because every thread will only enter
> the critical section once.
> 
> Remaining uses of atomic instructions are for ints or pointers.
> 
> Reported-by: Andreas Faerber <address@hidden>
> Signed-off-by: Paolo Bonzini <address@hidden>
> ---
>  tests/rcutorture.c | 20 ++++++++++++++++----
>  1 file changed, 16 insertions(+), 4 deletions(-)

Tested-by: Andreas Färber <address@hidden>

This lets rcutorture pass, but the same error occurs in test-rcu-list...

Btw any reason rcutorture does not fit one of the three naming schemes?

Regards,
Andreas

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