Re: [tip:x86/platform] x86/intel/quark: Switch off CR4.PGE so TLB flush uses CR3 instead

From: H. Peter Anvin
Date: Wed Sep 24 2014 - 14:44:28 EST

On 09/24/2014 11:42 AM, H. Peter Anvin wrote:
> On 09/24/2014 09:07 AM, Bryan O'Donoghue wrote:
>>> So __flush_tlb_all(); will do nothing but that's OK since load_cr3()
>>> already flushed the TLB - including any PTE with PGE set
>> I take your point though.
>> It's probably better to be explicit and do the whole
>> if (quark)
>> __flush_tlb();
>> else
>> __flush_tlb_all();
>> So that we aren't relying on the side effects of the previous statement.
> Well, we need a comment at least.

And certainly we don't need an if/else as we can just do it.


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