Re: [PATCH 20/30] x86, mm: remove hard-coded ASID limit checks

[Dave Hansen]

On 11/10/2017 04:20 AM, Peter Zijlstra wrote:
> On Wed, Nov 08, 2017 at 11:47:24AM -0800, Dave Hansen wrote:
>> +#define CR3_HW_ASID_BITS 12
>> +#define NR_AVAIL_ASIDS ((1<<CR3_AVAIL_ASID_BITS) - 1)
> That evaluates to 4095
> 
>> -		VM_WARN_ON_ONCE(asid > 4094);
>> +		VM_WARN_ON_ONCE(asid > NR_AVAIL_ASIDS);
> Not the same number

I think this got fixed up in the next patch (the check becomes a >=),
but I'll fix this to make it more clean and fix the intermediate breakage.