Messages in this thread |  | | | Subject | Re: Is iommu_num_pages() broken ? | | From | Benjamin Herrenschmidt <> | | Date | Sun, 05 Aug 2012 16:49:56 +1000 |
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On Sun, 2012-08-05 at 08:39 +0200, Andreas Schwab wrote: > addr & (io_page_size - 1) computes the offset into the page pointed to > by addr. Looks right to me. > > addr & ~(io_page_size - 1) would round addr down to the start of the > page.
Ah that's right, for some reason I'm so used to seeing ~ before such constructs that my brain must have imagined it :-)
Sorry for the noise. Next time I'll have coffee first then re-check ...
Cheers, Ben.
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