Re: [XenARM] [MINIOS] evtchn_pending_sel issue

[Rahul Balani <rahulb@xxxxxxxxxxx>]

 

It seems that there is a shift of one bit in the computation of l1i, since _ffs return 1 for the least significant bit (and not 0).

What do you think?

There is no shift of one bit in __ffs().. It returns the index of the first set bit in the 32-bit word.. So, it correctly returns 0 for your case.. You can check include/asm-arm/bitops.h for the definition of __ffs().. For input word = 1, all the if conditions will evaluate to true, and you will end up with k = 31-31 = 0..

-Rahul.

 

 

What I'm wondering is how it could work .. (and probably it could ;-) just something that probably I missed….

 

Thanks for your help

 

Daniel

 

 

 

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