linux-kernel - [PATCH 2/2] mm: correct stale comment of function check

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Message-Id: <20230704213932.1339204-3-shikemeng@huaweicloud.com>
Date:   Wed,  5 Jul 2023 05:39:32 +0800
From:   Kemeng Shi <shikemeng@...weicloud.com>
To:     akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     shikemeng@...weicloud.com
Subject: [PATCH 2/2] mm: correct stale comment of function check_pte

Commit 2aff7a4755bed ("mm: Convert page_vma_mapped_walk to work on PFNs")
replaced page with pfns in page_vma_mapped_walk structure and updated
"@pvmw->page" to "@pvmw->pfn" in comment of function page_vma_mapped_walk.

This patch update stale "page" to "pfn" in comment of check_pte.

Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
---
 mm/page_vma_mapped.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/mm/page_vma_mapped.c b/mm/page_vma_mapped.c
index 83858758e239..dd0a820a0e6c 100644
--- a/mm/page_vma_mapped.c
+++ b/mm/page_vma_mapped.c
@@ -54,20 +54,23 @@ static bool map_pte(struct page_vma_mapped_walk *pvmw)
 }
 
 /**
- * check_pte - check if @pvmw->page is mapped at the @pvmw->pte
- * @pvmw: page_vma_mapped_walk struct, includes a pair pte and page for checking
+ * check_pte - check if [pvmw->pfn, @pvmw->pfn + @pvmw->nr_pages) is
+ * mapped at the @pvmw->pte
+ * @pvmw: page_vma_mapped_walk struct, includes a pair pte and pfn range
+ * for checking
  *
- * page_vma_mapped_walk() found a place where @pvmw->page is *potentially*
+ * page_vma_mapped_walk() found a place where @pvmw->pfn is *potentially*
  * mapped. check_pte() has to validate this.
  *
  * pvmw->pte may point to empty PTE, swap PTE or PTE pointing to
  * arbitrary page.
  *
  * If PVMW_MIGRATION flag is set, returns true if @pvmw->pte contains migration
- * entry that points to @pvmw->page or any subpage in case of THP.
+ * entry that points to @pvmw->pfn or [pvmw->pfn, @pvmw->pfn + @pvmw->nr_pages)
+ * in case of THP.
  *
  * If PVMW_MIGRATION flag is not set, returns true if pvmw->pte points to
- * pvmw->page or any subpage in case of THP.
+ * pvmw->pfn or [pvmw->pfn, @pvmw->pfn + @pvmw->nr_pages) in case of THP.
  *
  * Otherwise, return false.
  *
-- 
2.30.0