From 12acf4fbc4f78b24822317888b9406d56dc9ad2a Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Fri, 2 Sep 2022 20:46:28 +0100 Subject: userfaultfd: convert mcontinue_atomic_pte() to use a folio shmem_getpage() is being replaced by shmem_get_folio() so use a folio throughout this function. Saves several calls to compound_head(). Link: https://lkml.kernel.org/r/20220902194653.1739778-33-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton --- mm/userfaultfd.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'mm/userfaultfd.c') diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c index 7327b2573f7c..9c035be2148b 100644 --- a/mm/userfaultfd.c +++ b/mm/userfaultfd.c @@ -243,20 +243,22 @@ static int mcontinue_atomic_pte(struct mm_struct *dst_mm, { struct inode *inode = file_inode(dst_vma->vm_file); pgoff_t pgoff = linear_page_index(dst_vma, dst_addr); + struct folio *folio; struct page *page; int ret; - ret = shmem_getpage(inode, pgoff, &page, SGP_NOALLOC); - /* Our caller expects us to return -EFAULT if we failed to find page. */ + ret = shmem_get_folio(inode, pgoff, &folio, SGP_NOALLOC); + /* Our caller expects us to return -EFAULT if we failed to find folio */ if (ret == -ENOENT) ret = -EFAULT; if (ret) goto out; - if (!page) { + if (!folio) { ret = -EFAULT; goto out; } + page = folio_file_page(folio, pgoff); if (PageHWPoison(page)) { ret = -EIO; goto out_release; @@ -267,13 +269,13 @@ static int mcontinue_atomic_pte(struct mm_struct *dst_mm, if (ret) goto out_release; - unlock_page(page); + folio_unlock(folio); ret = 0; out: return ret; out_release: - unlock_page(page); - put_page(page); + folio_unlock(folio); + folio_put(folio); goto out; } -- cgit v1.2.3-58-ga151