[parisc-linux] Help with posix_types.h

[Ulrich Drepper]

Cary Coutant <cary@cup.hp.com> writes:

> On PA-RISC, the thread pointer is kept in the read-only control register 
> CR 27.
> 
> For user-thread implementations, we provided a kernel API to change the 
> contents of the register.

This works fine for a 1:1 thread implementation but adds significant
runtime hits for a m:n implementation.  The latter is the direction we
are heading.

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