Re: [PATCH 7/9] mm: remove the unused MIGRATE_PFN_ERROR flag

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On 7/29/19 7:28 AM, Christoph Hellwig wrote:
We don't use this flag anymore, so remove it.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Reviewed-by: Ralph Campbell <rcampbell@xxxxxxxxxx>

---
  include/linux/migrate.h | 1 -
  1 file changed, 1 deletion(-)

diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 093d67fcf6dd..229153c2c496 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -167,7 +167,6 @@ static inline int migrate_misplaced_transhuge_page(struct mm_struct *mm,
  #define MIGRATE_PFN_LOCKED	(1UL << 2)
  #define MIGRATE_PFN_WRITE	(1UL << 3)
  #define MIGRATE_PFN_DEVICE	(1UL << 4)
-#define MIGRATE_PFN_ERROR	(1UL << 5)
  #define MIGRATE_PFN_SHIFT	6

The MIGRATE_PFN_SHIFT could be reduced to 5 since it is only used
to make room for the flags.

  static inline struct page *migrate_pfn_to_page(unsigned long mpfn)





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