From af3bbc12df80e8c279b94c752b6edca29841f4f5 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Fri, 14 Aug 2020 17:30:33 -0700 Subject: mm: add thp_size This function returns the number of bytes in a THP. It is like page_size(), but compiles to just PAGE_SIZE if CONFIG_TRANSPARENT_HUGEPAGE is disabled. Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton Reviewed-by: William Kucharski Reviewed-by: Zi Yan Cc: David Hildenbrand Cc: Mike Kravetz Cc: "Kirill A. Shutemov" Link: http://lkml.kernel.org/r/20200629151959.15779-5-willy@infradead.org Signed-off-by: Linus Torvalds --- mm/internal.h | 2 +- mm/page_io.c | 2 +- mm/page_vma_mapped.c | 4 ++-- 3 files changed, 4 insertions(+), 4 deletions(-) (limited to 'mm') diff --git a/mm/internal.h b/mm/internal.h index d11a9a8d2135..912bb1a1c10e 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -396,7 +396,7 @@ vma_address(struct page *page, struct vm_area_struct *vma) unsigned long start, end; start = __vma_address(page, vma); - end = start + PAGE_SIZE * (hpage_nr_pages(page) - 1); + end = start + thp_size(page) - PAGE_SIZE; /* page should be within @vma mapping range */ VM_BUG_ON_VMA(end < vma->vm_start || start >= vma->vm_end, vma); diff --git a/mm/page_io.c b/mm/page_io.c index 9e362567d454..f5e8bec8a8c7 100644 --- a/mm/page_io.c +++ b/mm/page_io.c @@ -40,7 +40,7 @@ static struct bio *get_swap_bio(gfp_t gfp_flags, bio->bi_iter.bi_sector <<= PAGE_SHIFT - 9; bio->bi_end_io = end_io; - bio_add_page(bio, page, PAGE_SIZE * hpage_nr_pages(page), 0); + bio_add_page(bio, page, thp_size(page), 0); } return bio; } diff --git a/mm/page_vma_mapped.c b/mm/page_vma_mapped.c index 719c35246cfa..e65629c056e8 100644 --- a/mm/page_vma_mapped.c +++ b/mm/page_vma_mapped.c @@ -227,7 +227,7 @@ next_pte: if (pvmw->address >= pvmw->vma->vm_end || pvmw->address >= __vma_address(pvmw->page, pvmw->vma) + - hpage_nr_pages(pvmw->page) * PAGE_SIZE) + thp_size(pvmw->page)) return not_found(pvmw); /* Did we cross page table boundary? */ if (pvmw->address % PMD_SIZE == 0) { @@ -268,7 +268,7 @@ int page_mapped_in_vma(struct page *page, struct vm_area_struct *vma) unsigned long start, end; start = __vma_address(page, vma); - end = start + PAGE_SIZE * (hpage_nr_pages(page) - 1); + end = start + thp_size(page) - PAGE_SIZE; if (unlikely(end < vma->vm_start || start >= vma->vm_end)) return 0; -- cgit v1.2.3