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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>
This commit is contained in:
Christoph Hellwig 2019-08-14 09:59:27 +02:00 committed by Jason Gunthorpe
parent 2a915acf88
commit 06d462beb4
3 changed files with 3 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/nouveau/nouveau_dmem.c
View File

@ -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);

1
include/linux/migrate.h
View File

@ -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)

4
mm/migrate.c
View File

@ -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 {