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mm/mempolicy: use a folio in do_mbind()
We actually add folios to the pagelist already, but then work with them as pages. Removes a call to compound_head() in PageKsm() and removes a reference to page->index. Link: https://lkml.kernel.org/r/20240229153015.1996829-1-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Gregory Price <gregory.price@memverge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -1356,29 +1356,30 @@ static long do_mbind(unsigned long start, unsigned long len,
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*/
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*/
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if (new->mode == MPOL_INTERLEAVE ||
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if (new->mode == MPOL_INTERLEAVE ||
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new->mode == MPOL_WEIGHTED_INTERLEAVE) {
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new->mode == MPOL_WEIGHTED_INTERLEAVE) {
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struct page *page;
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struct folio *folio;
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unsigned int order;
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unsigned int order;
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unsigned long addr = -EFAULT;
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unsigned long addr = -EFAULT;
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list_for_each_entry(page, &pagelist, lru) {
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list_for_each_entry(folio, &pagelist, lru) {
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if (!PageKsm(page))
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if (!folio_test_ksm(folio))
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break;
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break;
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}
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}
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if (!list_entry_is_head(page, &pagelist, lru)) {
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if (!list_entry_is_head(folio, &pagelist, lru)) {
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vma_iter_init(&vmi, mm, start);
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vma_iter_init(&vmi, mm, start);
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for_each_vma_range(vmi, vma, end) {
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for_each_vma_range(vmi, vma, end) {
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addr = page_address_in_vma(page, vma);
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addr = page_address_in_vma(
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folio_page(folio, 0), vma);
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if (addr != -EFAULT)
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if (addr != -EFAULT)
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break;
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break;
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}
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}
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}
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}
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if (addr != -EFAULT) {
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if (addr != -EFAULT) {
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order = compound_order(page);
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order = folio_order(folio);
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/* We already know the pol, but not the ilx */
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/* We already know the pol, but not the ilx */
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mpol_cond_put(get_vma_policy(vma, addr, order,
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mpol_cond_put(get_vma_policy(vma, addr, order,
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&mmpol.ilx));
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&mmpol.ilx));
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/* Set base from which to increment by index */
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/* Set base from which to increment by index */
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mmpol.ilx -= page->index >> order;
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mmpol.ilx -= folio->index >> order;
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}
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}
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}
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}
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}
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}
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