On Fri, 31 Aug 2012 10:59:38 +0530 "Aneesh Kumar K.V" <aneesh.ku...@linux.vnet.ibm.com> wrote:
> Gerald Schaefer <gerald.schae...@de.ibm.com> writes: > > > The thp page table pre-allocation code currently assumes that pgtable_t > > is of type "struct page *". This may not be true for all architectures, > > so this patch removes that assumption by replacing the functions > > prepare_pmd_huge_pte() and get_pmd_huge_pte() with two new functions > > that can be defined architecture-specific. > > > > It also removes two VM_BUG_ON checks for page_count() and page_mapcount() > > operating on a pgtable_t. Apart from the VM_BUG_ON removal, there will > > be no functional change introduced by this patch. > > Why is that VM_BUG_ON not needed any more ? What is that changed which break > that requirement ? Because pgtable_t for s390 is not a page and there simply is no page_count or page_mapcount. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
