linux-kernel - Re: [PATCH 07/16] dma-debug: add debugfs interface

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Message-ID: <20090114152216.GM20283@amd.com>
Date:	Wed, 14 Jan 2009 16:22:16 +0100
From:	Joerg Roedel <joerg.roedel@....com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	linux-kernel@...r.kernel.org, mingo@...hat.com,
	dwmw2@...radead.org, fujita.tomonori@....ntt.co.jp,
	netdev@...r.kernel.org, iommu@...ts.linux-foundation.org
Subject: Re: [PATCH 07/16] dma-debug: add debugfs interface

On Sun, Jan 11, 2009 at 12:08:26AM +0100, Ingo Molnar wrote:
> 
> * Joerg Roedel <joerg.roedel@....com> wrote:
> 
> > +/* Global error count */
> > +static u32 error_count;
> > +
> > +/* Global error show enable*/
> > +static u32 show_all_errors __read_mostly;
> > +/* Number of errors to show */
> > +static u32 show_num_errors = 1;
> > +
> >  static u32 num_free_entries;
> >  static u32 min_free_entries;
> 
> Small detail: please use native C types for non-hardware variables - 
> 'unsigned int', 'unsigned long', etc.
> 
> u32/u64 is typically used for variables where there is a real significance 
> to the precise width of the variable: there's either a hardware or a 
> user-space ABI involved.

There is some kind of userspace ABI: all these variables are exported
via debugfs. And debugfs relies on these types.

Joerg

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