mm: use vma_pages() for vma objects

vma_pages() is more readable and also better at avoiding error codes, so
use vma_pages() instead of direct operations on vma

Link: https://lkml.kernel.org/r/tencent_151850CF327EB055BBC83298A929BD06CD0A@qq.com
Signed-off-by: Chen Haonan <chen.haonan2@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/internal.h b/mm/internal.h
index 8450562744cfc4807d7a8becfe7ec9bcccac4a62..222e63b2dea48d497836570e1b8b2da451554fba 100644 (file)
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -616,7 +616,7 @@ folio_within_range(struct folio *folio, struct vm_area_struct *vma,
                unsigned long start, unsigned long end)
 {
        pgoff_t pgoff, addr;
-       unsigned long vma_pglen = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
+       unsigned long vma_pglen = vma_pages(vma);
 
        VM_WARN_ON_FOLIO(folio_test_ksm(folio), folio);
        if (start > end)