[PATCH v3 01/15] mm: do code cleanups to filemap_map_pmd()

[Qi Zheng <zhengqi.arch@bytedance.com>]

Currently we have two times the same few lines repeated
in filemap_map_pmd(). Deduplicate them and fix some code
style issues.

Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
---
 mm/filemap.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index daa0e23a6ee6..07c654202870 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -3203,11 +3203,8 @@ static bool filemap_map_pmd(struct vm_fault *vmf, struct page *page)
 	struct mm_struct *mm = vmf->vma->vm_mm;
 
 	/* Huge page is mapped? No need to proceed. */
-	if (pmd_trans_huge(*vmf->pmd)) {
-		unlock_page(page);
-		put_page(page);
-		return true;
-	}
+	if (pmd_trans_huge(*vmf->pmd))
+		goto out;
 
 	if (pmd_none(*vmf->pmd) && PageTransHuge(page)) {
 		vm_fault_t ret = do_set_pmd(vmf, page);
@@ -3222,13 +3219,15 @@ static bool filemap_map_pmd(struct vm_fault *vmf, struct page *page)
 		pmd_install(mm, vmf->pmd, &vmf->prealloc_pte);
 
 	/* See comment in handle_pte_fault() */
-	if (pmd_devmap_trans_unstable(vmf->pmd)) {
-		unlock_page(page);
-		put_page(page);
-		return true;
-	}
+	if (pmd_devmap_trans_unstable(vmf->pmd))
+		goto out;
 
 	return false;
+
+out:
+	unlock_page(page);
+	put_page(page);
+	return true;
 }
 
 static struct page *next_uptodate_page(struct page *page,
-- 
2.11.0