6.6-stable review patch. If anyone has any objections, please let me know.
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From: Matthew Wilcox (Oracle) willy@infradead.org
[ Upstream commit d5ab50b9412c0bba750eef5a34fd2937de1aee55 ]
Both callers want to deal with a folio, so return a folio from this function.
Link: https://lkml.kernel.org/r/20240403171838.1445826-3-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) willy@infradead.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Stable-dep-of: 37f0b47c5143 ("mm: khugepaged: fix the arguments order in khugepaged_collapse_file trace point") Signed-off-by: Sasha Levin sashal@kernel.org --- mm/khugepaged.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/mm/khugepaged.c b/mm/khugepaged.c index d0fcfa47085b4..b197323450b5a 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1041,7 +1041,7 @@ static int __collapse_huge_page_swapin(struct mm_struct *mm, return result; }
-static int alloc_charge_hpage(struct page **hpage, struct mm_struct *mm, +static int alloc_charge_folio(struct folio **foliop, struct mm_struct *mm, struct collapse_control *cc) { gfp_t gfp = (cc->is_khugepaged ? alloc_hugepage_khugepaged_gfpmask() : @@ -1051,7 +1051,7 @@ static int alloc_charge_hpage(struct page **hpage, struct mm_struct *mm,
folio = __folio_alloc(gfp, HPAGE_PMD_ORDER, node, &cc->alloc_nmask); if (!folio) { - *hpage = NULL; + *foliop = NULL; count_vm_event(THP_COLLAPSE_ALLOC_FAILED); return SCAN_ALLOC_HUGE_PAGE_FAIL; } @@ -1059,13 +1059,13 @@ static int alloc_charge_hpage(struct page **hpage, struct mm_struct *mm, count_vm_event(THP_COLLAPSE_ALLOC); if (unlikely(mem_cgroup_charge(folio, mm, gfp))) { folio_put(folio); - *hpage = NULL; + *foliop = NULL; return SCAN_CGROUP_CHARGE_FAIL; }
count_memcg_folio_events(folio, THP_COLLAPSE_ALLOC, 1);
- *hpage = folio_page(folio, 0); + *foliop = folio; return SCAN_SUCCEED; }
@@ -1094,7 +1094,8 @@ static int collapse_huge_page(struct mm_struct *mm, unsigned long address, */ mmap_read_unlock(mm);
- result = alloc_charge_hpage(&hpage, mm, cc); + result = alloc_charge_folio(&folio, mm, cc); + hpage = &folio->page; if (result != SCAN_SUCCEED) goto out_nolock;
@@ -1197,7 +1198,6 @@ static int collapse_huge_page(struct mm_struct *mm, unsigned long address, if (unlikely(result != SCAN_SUCCEED)) goto out_up_write;
- folio = page_folio(hpage); /* * The smp_wmb() inside __folio_mark_uptodate() ensures the * copy_huge_page writes become visible before the set_pmd_at() @@ -1786,7 +1786,7 @@ static int collapse_file(struct mm_struct *mm, unsigned long addr, struct page *hpage; struct page *page; struct page *tmp; - struct folio *folio; + struct folio *folio, *new_folio; pgoff_t index = 0, end = start + HPAGE_PMD_NR; LIST_HEAD(pagelist); XA_STATE_ORDER(xas, &mapping->i_pages, start, HPAGE_PMD_ORDER); @@ -1797,7 +1797,8 @@ static int collapse_file(struct mm_struct *mm, unsigned long addr, VM_BUG_ON(!IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS) && !is_shmem); VM_BUG_ON(start & (HPAGE_PMD_NR - 1));
- result = alloc_charge_hpage(&hpage, mm, cc); + result = alloc_charge_folio(&new_folio, mm, cc); + hpage = &new_folio->page; if (result != SCAN_SUCCEED) goto out;