[PATCH 07/11] mm: shmem: use pgtable_has_pmd_leaves()

From: Luiz Capitulino

Date: Mon Dec 15 2025 - 16:17:18 EST


Shmem uses has_transparent_hugepage() to check if PMD-sized pages are
supported, use pgtable_has_pmd_leaves() instead.

Signed-off-by: Luiz Capitulino <luizcap@xxxxxxxxxx>
---
mm/shmem.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index b329b5302c48..ad5825667b49 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -689,7 +689,8 @@ static int shmem_parse_huge(const char *str)
else
return -EINVAL;

- if (!has_transparent_hugepage() &&
+ if (!(IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) &&
+ pgtable_has_pmd_leaves()) &&
huge != SHMEM_HUGE_NEVER && huge != SHMEM_HUGE_DENY)
return -EINVAL;

@@ -4655,7 +4656,7 @@ static int shmem_parse_one(struct fs_context *fc, struct fs_parameter *param)
ctx->huge = result.uint_32;
if (ctx->huge != SHMEM_HUGE_NEVER &&
!(IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) &&
- has_transparent_hugepage()))
+ pgtable_has_pmd_leaves()))
goto unsupported_parameter;
ctx->seen |= SHMEM_SEEN_HUGE;
break;
@@ -5439,7 +5440,7 @@ void __init shmem_init(void)
#endif

#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- if (has_transparent_hugepage() && shmem_huge > SHMEM_HUGE_DENY)
+ if (pgtable_has_pmd_leaves() && shmem_huge > SHMEM_HUGE_DENY)
SHMEM_SB(shm_mnt->mnt_sb)->huge = shmem_huge;
else
shmem_huge = SHMEM_HUGE_NEVER; /* just in case it was patched */
--
2.52.0