Jeremy Fitzhardinge wrote:
> Linus Torvalds wrote:
>
>> On Fri, 20 Jun 2008, Ingo Molnar wrote:
>>
>>
>>> okay - Jeremy, could you try the fix below? (or tip/master, i just
>>> pushed this out)
>>>
>>>
>> Actually, don't try that one.
>>
>> It needs to be a _byte_ registers, so "ir" was wrong. You need "iq".
>>
>>
>
> Doesn't work, unfortunately:
> {standard input}:20511: Error: Incorrect register `%eax' used with `b'
> suffix
>
> lock; orb %eax,1(%rdi) # tmp64,
>
This does work:
asm volatile(LOCK_PREFIX "orb %1,%0"
: CONST_MASK_ADDR(nr, addr)
: "iq" ((u8)CONST_MASK(nr))
: "memory");
(ie, explicitly casting the mask to u8)
J
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