linux-kernel - [PATCH 25/25] mm: don't select MIGRATE_VMA_HELPER from HMM

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Date:   Mon, 17 Jun 2019 14:27:33 +0200
From:   Christoph Hellwig <hch@....de>
To:     Dan Williams <dan.j.williams@...el.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Ben Skeggs <bskeggs@...hat.com>
Cc:     linux-mm@...ck.org, nouveau@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-nvdimm@...ts.01.org,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 25/25] mm: don't select MIGRATE_VMA_HELPER from HMM_MIRROR

The migrate_vma helper is only used by noveau to migrate device private
pages around.  Other HMM_MIRROR users like amdgpu or infiniband don't
need it.

Signed-off-by: Christoph Hellwig <hch@....de>
Reviewed-by: Jason Gunthorpe <jgg@...lanox.com>
---
 drivers/gpu/drm/nouveau/Kconfig | 1 +
 mm/Kconfig                      | 1 -
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig
index 66c839d8e9d1..96b9814e6d06 100644
--- a/drivers/gpu/drm/nouveau/Kconfig
+++ b/drivers/gpu/drm/nouveau/Kconfig
@@ -88,6 +88,7 @@ config DRM_NOUVEAU_SVM
 	depends on DRM_NOUVEAU
 	depends on HMM_MIRROR
 	depends on STAGING
+	select MIGRATE_VMA_HELPER
 	default n
 	help
 	  Say Y here if you want to enable experimental support for
diff --git a/mm/Kconfig b/mm/Kconfig
index 7fa785551f96..55c9c661e2ee 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -680,7 +680,6 @@ config HMM_MIRROR
 	depends on (X86_64 || PPC64)
 	depends on MMU && 64BIT
 	select MMU_NOTIFIER
-	select MIGRATE_VMA_HELPER
 	help
 	  Select HMM_MIRROR if you want to mirror range of the CPU page table of a
 	  process into a device page table. Here, mirror means "keep synchronized".
-- 
2.20.1