linux-kernel - [PATCH 4/6] mm: pagewalk: add api documentation for walk_page_range

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Message-ID: <8991525.CDJkKcVGEf@devpool047>
Date:   Mon, 22 Aug 2022 15:02:36 +0200
From:   Rolf Eike Beer <eb@...ix.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/6] mm: pagewalk: add api documentation for walk_page_range_novma()

Signed-off-by: Rolf Eike Beer <eb@...ix.com>
---
 mm/pagewalk.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/mm/pagewalk.c b/mm/pagewalk.c
index a06eb100fe4e..dc3c850cd148 100644
--- a/mm/pagewalk.c
+++ b/mm/pagewalk.c
@@ -493,7 +493,15 @@ int walk_page_range(struct mm_struct *mm, unsigned long start,
 	return 0;
 }
 
-/*
+/**
+ * walk_page_range_novma - walk a range of pagetables not backed by a vma
+ * @mm:		mm_struct representing the target process of page table walk
+ * @start:	start address of the virtual address range
+ * @end:	end address of the virtual address range
+ * @ops:	operation to call during the walk
+ * @pgd:	pgd to walk if different from mm->pgd
+ * @private:	private data for callbacks' usage
+ *
  * Similar to walk_page_range() but can walk any page tables even if they are
  * not backed by VMAs. Because 'unusual' entries may be walked this function
  * will also not lock the PTEs for the pte_entry() callback. This is useful for
-- 
2.37.2

-- 
Rolf Eike Beer, emlix GmbH, http://www.emlix.com
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