[PATCH] nptl: Document the reason why __kind in pthread_mutex_t is part of the ABI

[Torvald Riegel]

On Mon, 2016-11-07 at 14:47 +0100, Florian Weimer wrote:
> I started composing a lengthy email about why we should align 
> pthread_mutex_t layout on i386 and x86_64 (because cross-process 
> compatibility is of more practical importance these days than 
> LinuxThreads backwards compatibility).  But then I realized that we 
> don't have this choice due to the static initializers, which have __kind 
> at different offsets.
> 
> The attached patch makes this more explicit in the relevant header files.

OK.