Messages in this thread | | | Date | Wed, 14 Feb 2007 08:56:09 +0000 | From | "Jan Beulich" <> | Subject | [Xen-devel] Re: [patch 16/21] Xen-paravirt: Add code into head.S to handle being booted by Xen |
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>>> @@ -528,7 +532,7 @@ ENTRY(_stext) >>> /* >>> * BSS section >>> */ >>> -.section ".bss.page_aligned","w" >>> +.section ".bss.page_aligned" >>> >> >> Why? >> > >I got complaints about section attribute mismatches without it.
Then perhaps ... "aw" is meant?
>>> +fastcall unsigned long long xen_pgd_val(pgd_t pgd) >>> +{ >>> + unsigned long long ret = pgd.pgd; >>> + if (ret) >>> + ret = machine_to_phys(XMADDR(ret)).paddr | 1; >>> >> >> Why can they be 0 here anyways? >> >> Normally they are all considered undefined when not present >> > >Not sure.
This should probably get sync-ed up with the page table handling changes submitted to xen-devel yesterday. Using zero/non-zero tests in contexts like this was always broken; should check for _PAGE_PRESENT.
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