pradeep singh wrote:
>
> Sorry, for my misunderstanding but i hope Jonathan actually means
> volatile harmful only in C and not while using extended asm with gcc? Or
> does you all consider volatile while using extended asm as harmful too?
> Incidentally i came to know that using volatile in such cases may be
> still be optimized by the gcc. And the correct way is to fake a side
> effect to the gcc, which can be done using "memory" clobbering directive
> in the correct place and not "m" or "+m".
>
> Does this means to exclude volatile from extended asm also, while using
> them in kernel?
>
We were talking about "register", not "volatile".
-hpa
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