PATCH: Add __PTHREAD_RWLOCK_INT_FLAGS_SHARED

[H.J. Lu]

On Mon, May 14, 2012 at 11:19 AM, Roland McGrath <roland@hack.frob.com> wrote:
>> +#ifndef __PTHREAD_RWLOCK_INT_FLAGS_SHARED
>> +# if __WORDSIZE == 64
>> +#  define __PTHREAD_RWLOCK_INT_FLAGS_SHARED 1
>> +# endif
>> +#endif
>
> This needs a comment explaining what the macro means.
>

I added

/* Define __PTHREAD_RWLOCK_INT_FLAGS_SHARED to 1 if pthread_rwlock_t
   has the shared field.  All 64-bit architectures have the shared field
   in pthread_rwlock_t.  */

Here is the updated patch..  OK to install?

Thanks.

-- 
H.J.
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