Bug 14138 - Move some functions to syscalls.list

[Andreas Jaeger <aj at suse dot com>]

The bug report states:
"The removal of compatibility code for old Linux kernel versions has left some
functions just calling a syscall with INLINE_SYSCALL or INTERNAL_SYSCALL
(possibly with cancellation handling), so that it may be possible to use
syscalls.list entries instead of custom C code.  Such files have the comment

/* Consider moving to syscalls.list.  */

(some now after removal of pre-2.2 support, more later after removal
of pre-2.4 support goes in)."

I've looked at a few examples and would like to know what you all
think is the best course of action. Let's take getrlimit as an
example.

The Linux/i386 implementation is:
 int
__new_getrlimit (enum __rlimit_resource resource, struct rlimit *rlimits)
{
  return INLINE_SYSCALL (ugetrlimit, 2, resource, CHECK_1 (rlimits));
}

and the file is included from others like: 

./sysdeps/unix/sysv/linux/s390/s390-32/getrlimit.c:#include <sysdeps/unix/sysv/linux/i386/getrlimit.c>
./sysdeps/unix/sysv/linux/powerpc/getrlimit.c:#include <sysdeps/unix/sysv/linux/i386/getrlimit.c>
./sysdeps/unix/sysv/linux/sh/getrlimit.c:#include <sysdeps/unix/sysv/linux/i386/getrlimit.c>
./ports/sysdeps/unix/sysv/linux/arm/getrlimit.c:#include <sysdeps/unix/sysv/linux/i386/getrlimit.c>
./ports/sysdeps/unix/sysv/linux/am33/getrlimit.c:#include <sysdeps/unix/sysv/linux/i386/getrlimit.c>
./ports/sysdeps/unix/sysv/linux/m68k/getrlimit.c:#include <sysdeps/unix/sysv/linux/i386/getrlimit.c>

There's not a single syscalls.list file to use since newer ports -
like x86-64 and s390-64, use the getrlimit call (defined in
sysdeps/unix/syscalls.list). Older architectures use ugetrlimit which
is the same as getrlimit on newer archs. So, there's no single file
AFAIK where I can add to.

Removing the i386 file would mean to add to each of the i386, s390-32,
powerpc, sh, arm, am33, and m68k syscalls.list files a line for
getrlimit using ugetrlimit. 

Is that the right approach and worthwhile doing? Or should we leave
the status quo instead?

Andreas
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