mm/migrate: remove redundant variables used in a for-loop

The variable addr is being set and incremented in a for-loop but not
actually being used.  It is redundant and so addr and also variable
start can be removed.

Link: https://lkml.kernel.org/r/20211221185729.609630-1-colin.i.king@gmail.com
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/migrate.c b/mm/migrate.c
index e50b805..05af2b2 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2481,8 +2481,7 @@ static bool migrate_vma_check_page(struct page *page)
 static void migrate_vma_unmap(struct migrate_vma *migrate)
 {
        const unsigned long npages = migrate->npages;
-       const unsigned long start = migrate->start;
-       unsigned long addr, i, restore = 0;
+       unsigned long i, restore = 0;
        bool allow_drain = true;
 
        lru_add_drain();
@@ -2528,7 +2527,7 @@ static void migrate_vma_unmap(struct migrate_vma *migrate)
                }
        }
 
-       for (addr = start, i = 0; i < npages && restore; addr += PAGE_SIZE, i++) {
+       for (i = 0; i < npages && restore; i++) {
                struct page *page = migrate_pfn_to_page(migrate->src[i]);
 
                if (!page || (migrate->src[i] & MIGRATE_PFN_MIGRATE))