From: Arnd Bergmann <arnd@kernel.org>
To: "K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
Long Li <longli@microsoft.com>,
"Anirudh Rayabharam (Microsoft)" <anirudh@anirudhrb.com>,
Jork Loeser <jloeser@linux.microsoft.com>,
Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] mshv: add vmbus dependency
Date: Wed, 20 May 2026 09:40:12 +0200 [thread overview]
Message-ID: <20260520074044.923728-1-arnd@kernel.org> (raw)
From: Arnd Bergmann <arnd@arndb.de>
When the vmbus driver is not part of the kernel, the mvhv_root
driver now fails to link:
ERROR: modpost: "hv_vmbus_exists" [drivers/hv/mshv_root.ko] undefined!
Avoid this by adding an explicit Kconfig dependency. Note that
stubbing out the hv_vmbus_exists() based on configuration would
also work for some cases, but not with MSHV_ROOT=y and HYPERV_VMBUS=m.
Fixes: f1a9e67c1138 ("mshv: limit SynIC management to MSHV-owned resources")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/hv/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
index 52af086fdeb2..21193b571a80 100644
--- a/drivers/hv/Kconfig
+++ b/drivers/hv/Kconfig
@@ -75,6 +75,7 @@ config MSHV_ROOT
# e.g. When withdrawing memory, the hypervisor gives back 4k pages in
# no particular order, making it impossible to reassemble larger pages
depends on PAGE_SIZE_4KB
+ depends on HYPERV_VMBUS
select EVENTFD
select VIRT_XFER_TO_GUEST_WORK
select HMM_MIRROR
--
2.39.5
next reply other threads:[~2026-05-20 7:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-20 7:40 Arnd Bergmann [this message]
2026-05-20 13:46 ` [PATCH] mshv: add vmbus dependency Michael Kelley
2026-05-20 13:51 ` Arnd Bergmann
2026-05-20 17:13 ` Jork Loeser
2026-05-20 17:15 ` Jork Loeser
2026-05-21 15:56 ` Michael Kelley
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