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authorChristoph Hellwig <hch@lst.de>2019-08-14 09:59:27 +0200
committerJason Gunthorpe <jgg@mellanox.com>2019-08-20 09:35:03 -0300
commit06d462beb470d361ffa8bd7b3d865509a8606987 (patch)
tree1492b6a6222ecd60ff28c64cddc9d62a1d8e42c7
parent2a915acf88ac0c4c583cd654bdc87371e38016c1 (diff)
mm: remove the unused MIGRATE_PFN_DEVICE flag
No one ever checks this flag, and we could easily get that information from the page if needed. Link: https://lore.kernel.org/r/20190814075928.23766-10-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ralph Campbell <rcampbell@nvidia.com> Reviewed-by: Jason Gunthorpe <jgg@mellanox.com> Tested-by: Ralph Campbell <rcampbell@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_dmem.c3
-rw-r--r--include/linux/migrate.h1
-rw-r--r--mm/migrate.c4
3 files changed, 3 insertions, 5 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouveau/nouveau_dmem.c
index d96b987b9982..fa1439941596 100644
--- a/drivers/gpu/drm/nouveau/nouveau_dmem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_dmem.c
@@ -580,8 +580,7 @@ static unsigned long nouveau_dmem_migrate_copy_one(struct nouveau_drm *drm,
*dma_addr))
goto out_dma_unmap;
- return migrate_pfn(page_to_pfn(dpage)) |
- MIGRATE_PFN_LOCKED | MIGRATE_PFN_DEVICE;
+ return migrate_pfn(page_to_pfn(dpage)) | MIGRATE_PFN_LOCKED;
out_dma_unmap:
dma_unmap_page(dev, *dma_addr, PAGE_SIZE, DMA_BIDIRECTIONAL);
diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 1e67dcfd318f..72120061b7d4 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -166,7 +166,6 @@ static inline int migrate_misplaced_transhuge_page(struct mm_struct *mm,
#define MIGRATE_PFN_MIGRATE (1UL << 1)
#define MIGRATE_PFN_LOCKED (1UL << 2)
#define MIGRATE_PFN_WRITE (1UL << 3)
-#define MIGRATE_PFN_DEVICE (1UL << 4)
#define MIGRATE_PFN_SHIFT 6
static inline struct page *migrate_pfn_to_page(unsigned long mpfn)
diff --git a/mm/migrate.c b/mm/migrate.c
index 8111e031fa2b..f4f5ae5ae44f 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2237,8 +2237,8 @@ again:
goto next;
page = device_private_entry_to_page(entry);
- mpfn = migrate_pfn(page_to_pfn(page))|
- MIGRATE_PFN_DEVICE | MIGRATE_PFN_MIGRATE;
+ mpfn = migrate_pfn(page_to_pfn(page)) |
+ MIGRATE_PFN_MIGRATE;
if (is_write_device_private_entry(entry))
mpfn |= MIGRATE_PFN_WRITE;
} else {