From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
Andy Lutomirski <luto@amacapital.net>,
Pavel Emelyanov <xemul@parallels.com>,
Matt Mackall <mpm@selenic.com>,
Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Peter Zijlstra <peterz@infradead.org>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH -mm] mm: Unify pte_to_pgoff and pgoff_to_pte helpers
Date: Wed, 14 Aug 2013 12:20:00 +0400 [thread overview]
Message-ID: <20130814082000.GN2869@moon> (raw)
In-Reply-To: <20130814010856.0098398b.akpm@linux-foundation.org>
On Wed, Aug 14, 2013 at 01:08:56AM -0700, Andrew Morton wrote:
> >
> > > Can it be written in C with types and proper variable names and such
> > > radical stuff?
> >
> > Could you elaborate? You mean inline helper or macro with type checks?
>
> /*
> * description goes here
> */
> static inline pteval_t pte_bfop(pteval_t val, int rightshift, ...)
> {
> ...
> }
>
> So much better! We really should only implement code in a macro if it
> *has* to be done as a macro and I don't think that's the case here?
Well, I'll have to check if it really doesn't generate additional
instructions in generated code, since it's hotpath. I'll ping back
once things are done.
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next prev parent reply other threads:[~2013-08-14 8:20 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-14 7:00 [PATCH -mm] mm: Unify pte_to_pgoff and pgoff_to_pte helpers Cyrill Gorcunov
2013-08-14 7:22 ` H. Peter Anvin
2013-08-14 7:24 ` Cyrill Gorcunov
2013-08-14 7:31 ` H. Peter Anvin
2013-08-14 7:33 ` Andrew Morton
2013-08-14 7:43 ` Cyrill Gorcunov
2013-08-14 8:08 ` Andrew Morton
2013-08-14 8:20 ` Cyrill Gorcunov [this message]
2013-08-14 9:50 ` Ingo Molnar
2013-08-14 10:02 ` Cyrill Gorcunov
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