Messages in this thread | | | Date | Thu, 11 May 2006 10:34:38 +0930 | From | Alan Modra <> | Subject | Re: [RFC/PATCH] Make powerpc64 use __thread for per-cpu variables |
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On Thu, May 11, 2006 at 07:05:24AM +1000, Paul Mackerras wrote: > No, Richard has a point, it's not the value that is the concern, it's > the address, which gcc could assume is still valid after a barrier. > Drat.
That may never happen, at least with a compiler that knows how to optimise away the addi. You're using -mtls-size=16 so all your accesses should look like
lwz rn,per_cpu_var@tprel(13)
gcc shouldn't think there is any reason to cache the address.
-- Alan Modra IBM OzLabs - Linux Technology Centre - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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