[PATCH] mm/migrate: remove the -EEXIST conversion for move_pages()

[Wei Yang <richard.weiyang@gmail.com>]

The -EEXIST conversion is introduced in commit 65462462ffb2 ("mm/gup:
follow_pfn_pte(): -EEXIST cleanup"), since follow_page() may call
follow_pfn_pte() which may return -EEXIST.

But after commit 7dff875c9436 ("mm/migrate: convert
add_page_for_migration() from follow_page() to folio_walk"), it use
folio_walk instead. This limit the error code and won't return -EEXIST.

Remove the error code conversion here.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Gregory Price <gourry@gourry.net>
Cc: Ying Huang <ying.huang@linux.alibaba.com>
Cc: Alistair Popple <apopple@nvidia.com>
---
 mm/migrate.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 9ececaf80ec1..629851e525e8 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2321,13 +2321,6 @@ static int do_pages_move(struct mm_struct *mm, nodemask_t task_nodes,
 			continue;
 		}
 
-		/*
-		 * The move_pages() man page does not have an -EEXIST choice, so
-		 * use -EFAULT instead.
-		 */
-		if (err == -EEXIST)
-			err = -EFAULT;
-
 		/*
 		 * If the page is already on the target node (!err), store the
 		 * node, otherwise, store the err.
-- 
2.34.1