Re: [patch] sharing maximum errno symbol used in __syscall_return (i386)

["H. Peter Anvin" <hpa@zytor.com>]

Masatake YAMATO wrote:
> > > Hi,
> > >
> > > __syscall_return in unistd.h is maintained?
> > >
> > > In the macro the value returned from system call is
> > > compared with the maximum error number defined in a header file 
> > > to know the call is successful or not. However, the maximum error number 
> > > is hard-coded and is not updated.
> > And it's wrong, anyway.  It has long been agreed that the maximum errno 
> > value, for any architecture, is 4095.
>
> So we should do just:
>
>
>    #define GENERIC_ERRNO_MAX 4095
>
> Here my patch is proved to be useful for maintaining __syscall_return:-P
>  

Well, most of the various macros in unistd.h really should go too, since 
they're mostly underutilized and definitely ill-maintained.

The only one that I know of which is still used by the kernel itself is 
execve.  If so, perhaps we should just have an open-coded execve.

	-hpa
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