Re: Remove pre-2.4.21 Linux kernel support

["Ryan S. Arnold" <ryan dot arnold at gmail dot com>]

On Thu, Jul 12, 2012 at 6:39 PM, Joseph S. Myers
<joseph@codesourcery.com> wrote:
> Continuing the removal of compatibility code for old Linux kernel
> versions, this patch increases the minimum kernel version from 2.4.1
> to 2.4.21.  This allows removal of all conditions on specific 2.4
> kernel versions except for __ASSUME_TMPFS_NAME (where the comment says
> 2.4.20 but the code is actually testing against 2.4.26; I'll deal with
> that when moving the required version to 2.6.0 rather than working out
> whether actually 2.4.21 is enough there).
>
> A fair amount of the patch deals with some macros defined and used
> only for powerpc; could a powerpc maintainer review / test these
> changes?  (There are also ports changes to m68k/kernel-features.h, but
> those are trivial.)
>
> There was a single __ASSUME_NETLINK_SUPPORT test outside of
> sysdeps/unix/sysv/linux, but it was only testing whether to define the
> __no_netlink_support variable, previously used by some code that may
> be built into nscd.  Since the patch eliminates all uses of that
> variable, the definition in nscd is no longer needed, so in fact all
> __ASSUME_NETLINK_SUPPORT tests can go (there was no substantive use
> relevant to non-Linux kernels) and so this patch removes them all and
> the definition.
>
> Tested x86 and x86_64.

Tested on powerpc32 and powerpc64 and no new regressions were observed.

Ryan S. Arnold