[072/212] mm: gup: use helper PAGE_ALIGNED in populate_vma_page_range()

Commit Message

Andrew Morton Sept. 2, 2021, 9:53 p.m. UTC

From: Miaohe Lin <[e-mail]>
Subject: mm: gup: use helper PAGE_ALIGNED in populate_vma_page_range()

Use helper PAGE_ALIGNED to check if address is aligned to PAGE_SIZE. 
Minor readability improvement.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Miaohe Lin <[e-mail]>
Reviewed-by: John Hubbard <[e-mail]>
Reviewed-by: David Hildenbrand <[e-mail]>
Reviewed-by: Claudio Imbrenda <[e-mail]>
Cc: Jan Kara <[e-mail]>
Cc: Kirill A. Shutemov <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 mm/gup.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

--- a/mm/gup.c~mm-gup-use-helper-page_aligned-in-populate_vma_page_range
+++ a/mm/gup.c
@@ -1471,8 +1471,8 @@  long populate_vma_page_range(struct vm_a
 	unsigned long nr_pages = (end - start) / PAGE_SIZE;
 	int gup_flags;
 
-	VM_BUG_ON(start & ~PAGE_MASK);
-	VM_BUG_ON(end   & ~PAGE_MASK);
+	VM_BUG_ON(!PAGE_ALIGNED(start));
+	VM_BUG_ON(!PAGE_ALIGNED(end));
 	VM_BUG_ON_VMA(start < vma->vm_start, vma);
 	VM_BUG_ON_VMA(end   > vma->vm_end, vma);
 	mmap_assert_locked(mm);