linux-kernel - [PATCH] mshv: Use PMD_ORDER instead of HPAGE_PMD

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Message-ID: 
 <176529822862.17729.14849117117197568731.stgit@skinsburskii-cloud-desktop.internal.cloudapp.net>
Date: Tue, 09 Dec 2025 16:37:20 +0000
From: Stanislav Kinsburskii <skinsburskii@...ux.microsoft.com>
To: kys@...rosoft.com, haiyangz@...rosoft.com, wei.liu@...nel.org,
 decui@...rosoft.com, longli@...rosoft.com
Cc: linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] mshv: Use PMD_ORDER instead of HPAGE_PMD_ORDER when
 processing regions

Fix page order determination logic when CONFIG_PGTABLE_HAS_HUGE_LEAVES
is undefined, as HPAGE_PMD_SHIFT is defined as BUILD_BUG in that case.

Fixes: abceb4297bf8 ("mshv: Fix huge page handling in memory region
traversal")
Signed-off-by: Stanislav Kinsburskii <skinsburskii@...ux.microsoft.com>
---
 drivers/hv/mshv_regions.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hv/mshv_regions.c b/drivers/hv/mshv_regions.c
index 202b9d551e39..dc2d7044fb91 100644
--- a/drivers/hv/mshv_regions.c
+++ b/drivers/hv/mshv_regions.c
@@ -58,7 +58,7 @@ static long mshv_region_process_chunk(struct mshv_mem_region *region,
 
 	page_order = folio_order(page_folio(page));
 	/* The hypervisor only supports 4K and 2M page sizes */
-	if (page_order && page_order != HPAGE_PMD_ORDER)
+	if (page_order && page_order != PMD_ORDER)
 		return -EINVAL;
 
 	stride = 1 << page_order;