Messages in this thread Patch in this message | | | Date | Thu, 1 Apr 2004 14:29:47 +1000 | From | David Gibson <> | Subject | Bugfix for PPC64 hugepage support |
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Linus, please apply.
Due to a misunderstanding of pmd_offset() the PPC64 hugepage code could end up looking at bogus pages as if they were PMD pages.
Index: working-2.6/arch/ppc64/mm/hugetlbpage.c =================================================================== --- working-2.6.orig/arch/ppc64/mm/hugetlbpage.c 2004-03-09 10:50:44.000000000 +1100 +++ working-2.6/arch/ppc64/mm/hugetlbpage.c 2004-04-01 12:53:54.920618632 +1000 @@ -190,6 +190,9 @@ BUG_ON(!in_hugepage_area(mm->context, addr)); pgd = pgd_offset(mm, addr); + if (pgd_none(*pgd)) + return NULL; + pmd = pmd_offset(pgd, addr); /* We shouldn't find a (normal) PTE page pointer here */
-- David Gibson | For every complex problem there is a david AT gibson.dropbear.id.au | solution which is simple, neat and | wrong. http://www.ozlabs.org/people/dgibson - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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