Remove pre-2.4 Linux kernel support

[Joseph S. Myers]

On Tue, 22 May 2012, Roland McGrath wrote:

> From a quick skim the changes look fine off hand.  But please add a
> formulaic comment that is easily grepped for to each file where the
> change renders a function nothing but an INLINE_SYSCALL call.

To confirm:

/* Consider moving to syscalls.list.  */

would be a suitable comment.

This also applies to files where there are calls to bounds-checking macros 
for arguments to INLINE_SYSCALL, since the bounded-pointers code is 
bitrotten.

This also applies to files where the only boilerplate around 
INLINE_SYSCALL is for cancellation (none in this patch, but 
sysdeps/unix/sysv/linux/poll.c and the powerpc64 
pread/pwrite/pread64/pwrite64 from the 2.2 patch).

Files using INTERNAL_SYSCALL or INLINE_SETXID_SYSCALL cannot be converted 
to syscalls.list (the former don't set errno, the latter have extra 
processing in the threaded case).

On that basis, the following could have such a comment after the 2.2 
patch:

sysdeps/unix/sysv/linux/poll.c
sysdeps/unix/sysv/linux/powerpc/chown.c
sysdeps/unix/sysv/linux/powerpc/powerpc64/pread.c
sysdeps/unix/sysv/linux/powerpc/powerpc64/pread64.c
sysdeps/unix/sysv/linux/powerpc/powerpc64/pwrite.c
sysdeps/unix/sysv/linux/powerpc/powerpc64/pwrite64.c

And the following after this patch:

sysdeps/unix/sysv/linux/i386/chown.c
sysdeps/unix/sysv/linux/i386/fchown.c
sysdeps/unix/sysv/linux/i386/getgroups.c
sysdeps/unix/sysv/linux/i386/getresgid.c
sysdeps/unix/sysv/linux/i386/getresuid.c
sysdeps/unix/sysv/linux/i386/lchown.c
sysdeps/unix/sysv/linux/s390/s390-32/chown.c
sysdeps/unix/sysv/linux/s390/s390-32/lchown.c
sysdeps/unix/sysv/linux/sh/chown.c

-- 
Joseph S. Myers
joseph@codesourcery.com