[PATCH] arm64: Re-enable PAN on uaccess_enable

[Catalin Marinas]

On Mon, Dec 12, 2016 at 04:06:36PM +0100, Christoffer Dall wrote:
> On Mon, Dec 12, 2016 at 01:50:26PM +0000, Marc Zyngier wrote:
> > Commit 4b65a5db3627 ("arm64: Introduce uaccess_{disable,enable}
> > functionality based on TTBR0_EL1") added conditional PAN
> > enable/disable. Unfortunately, a typo prevents PAN from being
> > re-enabled once it has been disabled.
> > 
> > Restore the PAN functionnality by adding the missing '!'.
> > 
> > Fixes: b65a5db3627 ("arm64: Introduce uaccess_{disable,enable} functionality based on TTBR0_EL1")
> > Reported-by: Christoffer Dall <christoffer.dall at linaro.org>
> > Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
> > ---
> > Christoffer, any chance you could give this a go and let me know
> > if that fixes your issues?
> 
> Yep, fixes the issue.  Thanks!

Thanks for confirming. I merged this with a slightly updated commit log:

------8<-----------------
Commit 4b65a5db3627 ("arm64: Introduce uaccess_{disable,enable}
functionality based on TTBR0_EL1") added conditional user access
enable/disable. Unfortunately, a typo prevents the PAN bit from being
cleared for user access functions.

-- 
Catalin