linux-kernel - [PATCH] vfio: Depend on EVENTFD

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Message-ID: <20150317144057.20251.30522.stgit@gimli.home>
Date:	Tue, 17 Mar 2015 08:42:15 -0600
From:	Alex Williamson <alex.williamson@...hat.com>
To:	kvm@...r.kernel.org
Cc:	a.motakis@...tualopensystems.com, b.reynal@...tualopensystems.com,
	linux-kernel@...r.kernel.org, eric.auger@...aro.org
Subject: [PATCH] vfio: Depend on EVENTFD

Since commit 42ac9bd18d4f ("vfio: initialize the virqfd workqueue in
VFIO generic code"), vfio itself depends on EVENTFD support.  Add this
to Kconfig to enforce the dependency.  This could perhaps become a
soft dependency if there was sufficient interest to make it more
modular, but eventfds are currently an integral part of vfio interrupt
delivery for all vfio bus drivers.

Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
---
 drivers/vfio/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vfio/Kconfig b/drivers/vfio/Kconfig
index d5322a4..db9bbb7 100644
--- a/drivers/vfio/Kconfig
+++ b/drivers/vfio/Kconfig
@@ -15,7 +15,7 @@ config VFIO_SPAPR_EEH
 
 menuconfig VFIO
 	tristate "VFIO Non-Privileged userspace driver framework"
-	depends on IOMMU_API
+	depends on IOMMU_API && EVENTFD
 	select VFIO_IOMMU_TYPE1 if (X86 || S390 || ARM_SMMU)
 	select VFIO_IOMMU_SPAPR_TCE if (PPC_POWERNV || PPC_PSERIES)
 	select VFIO_SPAPR_EEH if (PPC_POWERNV || PPC_PSERIES)

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