Re: [Linux-cluster] [PATCH] Get rid of non portable _syscall0

[Lon Hohberger <lhh redhat com>]

On Fri, 2005-06-10 at 11:31 +0200, Fabio Massimo Di Nitto wrote:
> Hi guys,
>  while building the suite on ia64 I found out that _syscall0 is not available on all Linux supported
> arched and as far as i understood the overall _syscall$magicnumber will disappear.
> 
> Jeff in CC can probably give a much more detailed explanation if needed.
> 
> Adam in CC cooked up a patch (in attachment) to make the code portable.

gettid is not a syscall which fails.  From the gettid(2):

--------------
RETURN VALUE
       On success, returns the thread ID of the current process.

ERRORS
       This call is always successful.
--------------

Similarly, the code is written to rely on the documented behavior.  So,
when it's not available, maybe the wrapper should return
(pid_t)pthread_self() instead of -ENOSYS?

-- Lon