linux-kernel - [PATCH 30/45] mm,mincore: Enable mincore_pte

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Message-ID: <20240704043132.28501-31-osalvador@suse.de>
Date: Thu,  4 Jul 2024 06:31:17 +0200
From: Oscar Salvador <osalvador@...e.de>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	Peter Xu <peterx@...hat.com>,
	Muchun Song <muchun.song@...ux.dev>,
	David Hildenbrand <david@...hat.com>,
	SeongJae Park <sj@...nel.org>,
	Miaohe Lin <linmiaohe@...wei.com>,
	Michal Hocko <mhocko@...e.com>,
	Matthew Wilcox <willy@...radead.org>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Oscar Salvador <osalvador@...e.de>
Subject: [PATCH 30/45] mm,mincore: Enable mincore_pte_range to handle hugetlb vmas

PMD-mapped hugetlb vmas will also mincore_pte_range.
Add the required code so it knows how to handle those there.

Signed-off-by: Oscar Salvador <osalvador@...e.de>
---
 mm/mincore.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/mincore.c b/mm/mincore.c
index d6bd19e520fc..5154bc705f60 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -18,6 +18,7 @@
 #include <linux/shmem_fs.h>
 #include <linux/hugetlb.h>
 #include <linux/pgtable.h>
+#include <linux/mm_inline.h>
 
 #include <linux/uaccess.h>
 #include "swap.h"
@@ -106,8 +107,9 @@ static int mincore_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
 	unsigned char *vec = walk->private;
 	int nr = (end - addr) >> PAGE_SHIFT;
 
-	ptl = pmd_trans_huge_lock(pmd, vma);
+	ptl = pmd_huge_lock(pmd, vma);
 	if (ptl) {
+		/* Better handling of hugetlb is required (pte marker etc.) */
 		memset(vec, 1, nr);
 		spin_unlock(ptl);
 		goto out;
-- 
2.26.2