linux-kernel - [PATCH v2 03/16] mm/huge_memory: fix comment of __pud_trans_huge

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Date:   Tue, 28 Jun 2022 21:28:22 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <shy828301@...il.com>, <willy@...radead.org>, <zokeefe@...gle.com>,
        <songmuchun@...edance.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, <linmiaohe@...wei.com>
Subject: [PATCH v2 03/16] mm/huge_memory: fix comment of __pud_trans_huge_lock

__pud_trans_huge_lock returns page table lock pointer if a given pud maps
a thp instead of 'true' since introduced. Fix corresponding comments.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
Acked-by: Muchun Song <songmuchun@...edance.com>
---
 mm/huge_memory.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 76dc6d003245..f7164ef8b6e3 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2006,10 +2006,10 @@ spinlock_t *__pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma)
 }
 
 /*
- * Returns true if a given pud maps a thp, false otherwise.
+ * Returns page table lock pointer if a given pud maps a thp, NULL otherwise.
  *
- * Note that if it returns true, this routine returns without unlocking page
- * table lock. So callers must unlock it.
+ * Note that if it returns page table lock pointer, this routine returns without
+ * unlocking page table lock. So callers must unlock it.
  */
 spinlock_t *__pud_trans_huge_lock(pud_t *pud, struct vm_area_struct *vma)
 {
-- 
2.23.0