linux-kernel - [PATCH 6.1.y v2] Revert "selftests: mm: fix map_hugetlb failure on 64K page size systems"

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Message-ID: <20251023014732.73721-1-leon.hwang@linux.dev>
Date: Thu, 23 Oct 2025 09:47:32 +0800
From: Leon Hwang <leon.hwang@...ux.dev>
To: stable@...r.kernel.org,
	greg@...ah.com
Cc: akpm@...ux-foundation.org,
	david@...hat.com,
	lorenzo.stoakes@...cle.com,
	lance.yang@...ux.dev,
	shuah@...nel.org,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Leon Hwang <leon.hwang@...ux.dev>
Subject: [PATCH 6.1.y v2] Revert "selftests: mm: fix map_hugetlb failure on 64K page size systems"

This reverts commit a584c7734a4dd050451fcdd65c66317e15660e81 to avoid
the build error:

map_hugetlb.c: In function 'main':
map_hugetlb.c:79:25: warning: implicit declaration of function 'default_huge_page_size' [-Wimplicit-function-declaration]
79 |         hugepage_size = default_huge_page_size();

Signed-off-by: Leon Hwang <leon.hwang@...ux.dev>
---
v1 -> v2:
  - Revert the commit instead of fixing the build error.
  - https://lore.kernel.org/linux-mm/20251022055138.375042-1-leon.hwang@linux.dev/

 tools/testing/selftests/vm/map_hugetlb.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/tools/testing/selftests/vm/map_hugetlb.c b/tools/testing/selftests/vm/map_hugetlb.c
index c65c55b7a789..312889edb84a 100644
--- a/tools/testing/selftests/vm/map_hugetlb.c
+++ b/tools/testing/selftests/vm/map_hugetlb.c
@@ -15,7 +15,6 @@
 #include <unistd.h>
 #include <sys/mman.h>
 #include <fcntl.h>
-#include "vm_util.h"

 #define LENGTH (256UL*1024*1024)
 #define PROTECTION (PROT_READ | PROT_WRITE)
@@ -71,16 +70,10 @@ int main(int argc, char **argv)
 {
 	void *addr;
 	int ret;
-	size_t hugepage_size;
 	size_t length = LENGTH;
 	int flags = FLAGS;
 	int shift = 0;

-	hugepage_size = default_huge_page_size();
-	/* munmap with fail if the length is not page aligned */
-	if (hugepage_size > length)
-		length = hugepage_size;
-
 	if (argc > 1)
 		length = atol(argv[1]) << 20;
 	if (argc > 2) {
--
2.51.0