On 2011-08-19, at 4:29 PM, Ted Ts'o wrote:
> On Tue, Aug 16, 2011 at 01:54:14PM +0200, Bernd Schubert wrote:
>> +static inline int is_32bit_api(void)
>> +{
>> +#ifdef HAVE_IS_COMPAT_TASK
>> + return is_compat_task();
>> +#else
>> + return (BITS_PER_LONG == 32);
>> +#endif
>
> I assume is_compat_task() is coming from another patch? What is the
> status of that change?
No, is_compat_task() is upstream for most (all?) of the architectures
that support hybrid 32-/64-bit operation. It is set at 32-bit syscall
entry when running on 64-bit architectures.
The only minor error in this patch (fixed with a new version from Bernd)
is that this should be under CONFIG_COMPAT instead of HAVE_IS_COMPAT_TASK.
> In the case where is_compat_task() is not defined, we can't just test
> based on BITS_PER_LONG == 32, since even on an x86_64 machine, it's
> possible we're running a 32-bit binary in compat mode....
It is definitely available on x86_64.
Cheers, Andreas
--
Andreas Dilger
Principal Engineer
Whamcloud, Inc.
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