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Re: [PATCH] aarch64: Move remaining sysdeps/unix/sysv/linux/aarch64/nptl/ files
- From: Roland McGrath <roland at hack dot frob dot com>
- To: Chris Metcalf <cmetcalf at tilera dot com>
- Cc: Richard Henderson <rth at twiddle dot net>, <libc-alpha at sourceware dot org>, <marcus dot shawcroft at arm dot com>, Richard Henderson <rth at redhat dot com>
- Date: Thu, 5 Jun 2014 11:43:26 -0700 (PDT)
- Subject: Re: [PATCH] aarch64: Move remaining sysdeps/unix/sysv/linux/aarch64/nptl/ files
- Authentication-results: sourceware.org; auth=none
- References: <1401818095-15788-1-git-send-email-rth at twiddle dot net> <20140603180526 dot 9CA032C3A18 at topped-with-meat dot com> <5390945C dot 2010303 at twiddle dot net> <5390976C dot 2010603 at tilera dot com>
> It looks like x86 and arm are already using sysdeps/ARCH/nptl/bits, so
> perhaps better to be consistent, though?
The nptl/ subdir is appropriate, because these files do not apply to any
non-nptl configuration that uses sysdeps/ARCH. Today sysdeps/ARCH/nptl
gets into the list because of the add-on mechanism. But later on, it will
still get there, because once nptl is no longer an add-on each
sysdeps/unix/sysv/linux/ARCH/Implies will list sysdeps/ARCH/nptl.
> Unfortunately, powerpc and alpha already followed your original proposal
> of moving to sysdeps/unix/sysv/linux/ARCH/bits for these files. Roland,
> do you think the powerpc/alpha maintainers should adjust those paths to
> be consistent with x86 and arm?
Using sysdeps/unix/sysv/linux/ARCH/ here is an acceptable intermediate
step. There are really two separate things going on here:
1. De-add-on-ization of NPTL.
To do just this, using sysdeps/unix/sysv/linux/ARCH/ makes sense and
is the least change from the status quo.
2. De-Linux-ization of NPTL code containing no actual Linuxisms.
Assuming each bits/ file actually contains no Linuxisms, then
using sysdeps/ARCH/nptl/ accomplishes one tiny piece of this work.
#1 is what requires action from every machine maintainer. For #2 I'll be
able to proceed piecemeal with each architecture I'm actually paying
attention to for a non-Linux NPTL port, which is just ARM to begin with and
later will include x86.
So if you want to vet the bits/ files and verify there are no creeping
Linuxisms in there, then moving them to sysdeps/ARCH/nptl now is great.
But if you want to think about it less and just move them to
sysdeps/unix/sysv/linux/ARCH/, that is just fine too.