kernel virtual memory access (from app) does not generatesegfault

Russell King - ARM Linux linux at
Wed Apr 21 15:36:53 EDT 2010

On Wed, Apr 21, 2010 at 08:43:17PM +0800, anfei wrote:
> On Wed, Apr 21, 2010 at 12:17:41PM +0100, Dave P. Martin wrote:
> > Note that my observations were on an armv7 kernel.  Should we still hit the
> > same bit of code in this case, or have I misdiagnosed the problem?
> > 
> You said your kernel is .28, so it seems too old and this commit may fix
> it: 
> commit d25ef8b86e6a58f5476bf6e4a8da730b335f68fa
> 	ARM: 5728/1: Proper prefetch abort handling on ARMv6 and ARMv7

Indeed, yes.  However, I think the fix is still value for older CPUs.

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