From: Richard Henderson <rth@twiddle.net>
To: Michael Cree <mcree@orcon.net.nz>
Cc: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org,
ink@jurassic.park.msu.ru, David Howells <dhowells@redhat.com>
Subject: Re: Alpha: suspicious compiler warning in entry.S
Date: Wed, 28 Oct 2009 16:13:09 -0700 [thread overview]
Message-ID: <4AE8D005.1030302@twiddle.net> (raw)
In-Reply-To: <4AE7ECC2.8050202@orcon.net.nz>
On 10/28/2009 12:03 AM, Michael Cree wrote:
> I am wondering whether it might be better
> to rearrange the bits in the thread information flags so that
> _TIF_WORK_MASK
> has a value less than 255 and the single instruction to perform an and
> operation can be maintained.
It would be better to rearrange TIF_NODIFY_RESUME down to 3.
In fact, you might as well rearrange the ones currently occupying
3-7 up to 8 and leave a hole for _TIF_WORK_MASK expansion, and
add a nice comment there at the same time.
r~
next prev parent reply other threads:[~2009-10-28 23:13 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-28 7:03 Alpha: suspicious compiler warning in entry.S Michael Cree
2009-10-28 23:13 ` Richard Henderson [this message]
2009-10-31 2:33 ` [PATCH] Alpha: Rearrange thread info flags fixing two regressions Michael Cree
2009-12-01 4:06 ` Matt Turner
2009-12-01 4:06 ` Matt Turner
2009-12-01 12:31 ` Christoph Hellwig
2009-12-01 15:58 ` Matt Turner
2009-10-30 13:16 ` Alpha: suspicious compiler warning in entry.S David Howells
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