linux-kernel - Re: [PATCH 1/1] security: introduce fs caps

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Date:	Thu, 9 Nov 2006 00:17:07 -0600
From:	"Serge E. Hallyn" <serue@...ibm.com>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	"Serge E. Hallyn" <serue@...ibm.com>, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	Stephen Smalley <sds@...ho.nsa.gov>,
	James Morris <jmorris@...ei.org>,
	Chris Wright <chrisw@...s-sol.org>,
	Andrew Morton <akpm@...l.org>,
	KaiGai Kohei <kaigai@...gai.gr.jp>,
	Chris Friedhoff <chris@...edhoff.org>
Subject: Re: [PATCH 1/1] security: introduce fs caps

Quoting Alexey Dobriyan (adobriyan@...il.com):
> On Wed, Nov 08, 2006 at 05:52:03PM -0600, Serge E. Hallyn wrote:
> > > > +	__u32 version;
> > > > +	__u32 effective;
> > > > +	__u32 permitted;
> > > > +	__u32 inheritable;
> > > > +};
> > > > +
> > > > +static inline void convert_to_le(struct vfs_cap_data_struct *cap)
> > > > +{
> > > > +	cap->version = le32_to_cpu(cap->version);
> > > > +	cap->effective = le32_to_cpu(cap->effective);
> > > > +	cap->permitted = le32_to_cpu(cap->permitted);
> > > > +	cap->inheritable = le32_to_cpu(cap->inheritable);
> > > > +}
> > >
> > > This pretty much defeats sparse endian checking. You will get warnings
> > > regardless of whether u32 or le32 are used.
> >
> > But I don't get any sparse warnings with make C=1.  Am I doing something
> > wrong?
> 
> You need (temporarily) to use CF:
> 
> 	make C=1 CF=-D__CHECK_ENDIAN__ ...

Ah, cool, now I see it, will try to fix.

thanks,
-serge
-
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