On 15/02/16 14:53, Jan Beulich wrote:
>>>> On 05.02.16 at 14:42, <andrew.coop...@citrix.com> wrote:
>> --- a/xen/arch/x86/cpu/common.c
>> +++ b/xen/arch/x86/cpu/common.c
>> @@ -53,8 +53,24 @@ static unsigned int cleared_caps[NCAPINTS];
>>
>> void __init setup_clear_cpu_cap(unsigned int cap)
>> {
>> + const uint32_t *dfs;
>> + unsigned int i;
>> +
>> + if ( test_bit(cap, cleared_caps) )
>> + return;
>> +
>> __clear_bit(cap, boot_cpu_data.x86_capability);
>> __set_bit(cap, cleared_caps);
> Perhaps __test_and_set_bit() above?
Hmm yes - that won't make it atomic.
And I will fix up the style issues.
~Andrew
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