+ mm-migrate-remove-cpages-in-migrate_vma_finalize.patch added to -mm tree

+ mm-migrate-remove-cpages-in-migrate_vma_finalize.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/migrate: remove cpages-- in migrate_vma_finalize()
has been added to the -mm tree.  Its filename is
     mm-migrate-remove-cpages-in-migrate_vma_finalize.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/mm-migrate-remove-cpages-in-migrate_vma_finalize.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/mm-migrate-remove-cpages-in-migrate_vma_finalize.patch

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Ralph Campbell <rcampbell@nvidia.com>
Subject: mm/migrate: remove cpages-- in migrate_vma_finalize()

The variable struct migrate_vma->cpages is only used in
migrate_vma_setup().  There is no need to decrement it in
migrate_vma_finalize() since it is never checked.

Link: http://lkml.kernel.org/r/20200827190735.12752-1-rcampbell@nvidia.com
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/migrate.c |    1 -
 1 file changed, 1 deletion(-)

--- a/mm/migrate.c~mm-migrate-remove-cpages-in-migrate_vma_finalize
+++ a/mm/migrate.c
@@ -3077,7 +3077,6 @@ void migrate_vma_finalize(struct migrate
 
 		remove_migration_ptes(page, newpage, false);
 		unlock_page(page);
-		migrate->cpages--;
 
 		if (is_zone_device_page(page))
 			put_page(page);
_

Patches currently in -mm which might be from rcampbell@nvidia.com are

mm-migrate-remove-cpages-in-migrate_vma_finalize.patch
mm-migrate-remove-obsolete-comment-about-device-public.patch