linux-kernel - [PATCH 3/6] mm: pagewalk: fix documentation of PTE hole handling

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Message-ID: <3695521.kQq0lBPeGt@devpool047>
Date:   Mon, 22 Aug 2022 15:01:32 +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 3/6] mm: pagewalk: fix documentation of PTE hole handling

Empty PTEs are passed to the pte_entry callback, not to pte_hole.

Signed-off-by: Rolf Eike Beer <eb@...ix.com>
---
 include/linux/pagewalk.h | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/include/linux/pagewalk.h b/include/linux/pagewalk.h
index ac7b38ad5903..f3fafb731ffd 100644
--- a/include/linux/pagewalk.h
+++ b/include/linux/pagewalk.h
@@ -15,12 +15,12 @@ struct mm_walk;
  *			this handler is required to be able to handle
  *			pmd_trans_huge() pmds.  They may simply choose to
  *			split_huge_page() instead of handling it explicitly.
- * @pte_entry:		if set, called for each non-empty PTE (lowest-level)
- *			entry
+ * @pte_entry:		if set, called for each PTE (lowest-level) entry,
+ *			including empty ones
  * @pte_hole:		if set, called for each hole at all levels,
- *			depth is -1 if not known, 0:PGD, 1:P4D, 2:PUD, 3:PMD
- *			4:PTE. Any folded depths (where PTRS_PER_P?D is equal
- *			to 1) are skipped.
+ *			depth is -1 if not known, 0:PGD, 1:P4D, 2:PUD, 3:PMD.
+ *			Any folded depths (where PTRS_PER_P?D is equal to 1)
+ *			are skipped.
  * @hugetlb_entry:	if set, called for each hugetlb entry
  * @test_walk:		caller specific callback function to determine whether
  *			we walk over the current vma or not. Returning 0 means
-- 
2.37.2

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