Re: new architectures, time_t __kernel_long_t

From: Al Viro
Date: Fri Dec 21 2012 - 00:01:57 EST

On Thu, Dec 20, 2012 at 09:00:27PM -0800, H. Peter Anvin wrote:
> On 12/20/2012 08:57 PM, Al Viro wrote:
> > On Wed, Nov 14, 2012 at 12:18:01PM +0000, Arnd Bergmann wrote:
> >
> >> The other types that are used as 64 bit on x32 are ino_t, nlink_t,
> >> size_t, ssize_t, ptrdiff_t, and off_t.
> >
> > *Kernel-side* we should not give a damn about the userland nlink_t, period.
> > Making it architecture-dependent had been a bad mistake that essentially
> > made nlink_t useless for the kernel. That mistake had been fixed; please,
> > do not bring it back. If some userland structure needs to include a field
> > encoding nlink_t values, please use an explicitly-sized type when refering
> > to it kernel-side.
> >
> We should never use userland types per se. We can use __kernel_*_t
> typedefs to make the kernel headers neater if it makes sense, but that
> is often not even necessary.

... as long as we do not have typedef __kernel_foo_t foo_t in linux/types.h.
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