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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2024-04-23 23:55:36 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-05-05 17:53:48 -0700 |
| commit | a568b4126b20ebbc01914e12d083379720911799 (patch) | |
| tree | 102acd5a32a6d3aea72447e718f2c57dcb9322d4 /mm/userfaultfd.c | |
| parent | e18a9faf06c2407916326bf5f1112f5eba859331 (diff) | |
| download | linux-a568b4126b20ebbc01914e12d083379720911799.tar.gz linux-a568b4126b20ebbc01914e12d083379720911799.tar.bz2 linux-a568b4126b20ebbc01914e12d083379720911799.zip | |
userfault; expand folio use in mfill_atomic_install_pte()
Call page_folio() a little earlier so we can use folio_mapping()
instead of page_mapping(), saving a call to compound_head().
Link: https://lkml.kernel.org/r/20240423225552.4113447-6-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/userfaultfd.c')
| -rw-r--r-- | mm/userfaultfd.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c index 575ccf90325a..8b1005ef9dfa 100644 --- a/mm/userfaultfd.c +++ b/mm/userfaultfd.c @@ -180,9 +180,9 @@ int mfill_atomic_install_pte(pmd_t *dst_pmd, pte_t _dst_pte, *dst_pte; bool writable = dst_vma->vm_flags & VM_WRITE; bool vm_shared = dst_vma->vm_flags & VM_SHARED; - bool page_in_cache = page_mapping(page); spinlock_t *ptl; - struct folio *folio; + struct folio *folio = page_folio(page); + bool page_in_cache = folio_mapping(folio); _dst_pte = mk_pte(page, dst_vma->vm_page_prot); _dst_pte = pte_mkdirty(_dst_pte); @@ -212,7 +212,6 @@ int mfill_atomic_install_pte(pmd_t *dst_pmd, if (!pte_none_mostly(ptep_get(dst_pte))) goto out_unlock; - folio = page_folio(page); if (page_in_cache) { /* Usually, cache pages are already added to LRU */ if (newly_allocated) |