Re: [PATCH] x86/mm: fix slow_virt_to_phys() for X86_PAE again

[Toshi Kani <toshi.kani@hpe.com>]

On Thu, 2016-02-25 at 01:58 -0800, Dexuan Cui wrote:
> "d1cd12108346: x86, pageattr: Prevent overflow in slow_virt_to_phys() for
> X86_PAE"
> was unintentionally removed by the recent
> "34437e67a672: x86/mm: Fix slow_virt_to_phys() to handle large PAT bit".
> 
> And, the variable 'phys_addr' was defined as "unsigned long" by mistake
> -- it should
> be "phys_addr_t".
> 
> As a result, Hyper-V network driver in 32-PAE Linux guest can't work
> again.
> 
> Fixes: "commmit 34437e67a672: x86/mm: Fix slow_virt_to_phys() to handle
> large PAT bit"
> Signed-off-by: Dexuan Cui <decui@microsoft.com>
> Cc: Toshi Kani <toshi.kani@hpe.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: K. Y. Srinivasan <kys@microsoft.com>
> Cc: Haiyang Zhang <haiyangz@microsoft.com>
> Cc: gregkh@linuxfoundation.org
> Cc: linux-mm@kvack.org
> Cc: olaf@aepfle.de
> Cc: apw@canonical.com
> Cc: jasowang@redhat.com
> Cc: stable@vger.kernel.org

Thanks for the fix and adding the comment to explain the trick! A The change
looks good to me.

Reviewed-by: Toshi Kani <toshi.kani@hpe.com>

-Toshi

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