linux-kernel - [PATCH 10/10] mm: remove CONFIG_MIGRATE_VMA

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Date:   Wed, 14 Aug 2019 09:59:28 +0200
From:   Christoph Hellwig <hch@....de>
To:     Jérôme Glisse <jglisse@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Ben Skeggs <bskeggs@...hat.com>
Cc:     Ralph Campbell <rcampbell@...dia.com>,
        Bharata B Rao <bharata@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        nouveau@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 10/10] mm: remove CONFIG_MIGRATE_VMA_HELPER

CONFIG_MIGRATE_VMA_HELPER guards helpers that are required for proper
devic private memory support.  Remove the option and just check for
CONFIG_DEVICE_PRIVATE instead.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 drivers/gpu/drm/nouveau/Kconfig | 1 -
 mm/Kconfig                      | 3 ---
 mm/migrate.c                    | 4 ++--
 3 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig
index df4352c279ba..3558df043592 100644
--- a/drivers/gpu/drm/nouveau/Kconfig
+++ b/drivers/gpu/drm/nouveau/Kconfig
@@ -89,7 +89,6 @@ config DRM_NOUVEAU_SVM
 	depends on MMU
 	depends on STAGING
 	select HMM_MIRROR
-	select MIGRATE_VMA_HELPER
 	select MMU_NOTIFIER
 	default n
 	help
diff --git a/mm/Kconfig b/mm/Kconfig
index 563436dc1f24..2fe4902ad755 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -669,9 +669,6 @@ config ZONE_DEVICE
 
 	  If FS_DAX is enabled, then say Y.
 
-config MIGRATE_VMA_HELPER
-	bool
-
 config DEV_PAGEMAP_OPS
 	bool
 
diff --git a/mm/migrate.c b/mm/migrate.c
index 33e063c28c1b..993386cb5335 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2117,7 +2117,7 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm,
 
 #endif /* CONFIG_NUMA */
 
-#if defined(CONFIG_MIGRATE_VMA_HELPER)
+#ifdef CONFIG_DEVICE_PRIVATE
 static int migrate_vma_collect_hole(unsigned long start,
 				    unsigned long end,
 				    struct mm_walk *walk)
@@ -2942,4 +2942,4 @@ void migrate_vma_finalize(struct migrate_vma *migrate)
 	}
 }
 EXPORT_SYMBOL(migrate_vma_finalize);
-#endif /* defined(MIGRATE_VMA_HELPER) */
+#endif /* CONFIG_DEVICE_PRIVATE */
-- 
2.20.1