mm/memory: remove unnecessary pte_devmap case in copy_one_pte()
authorchenqiwu <chenqiwu@xiaomi.com>
Tue, 2 Jun 2020 04:50:08 +0000 (21:50 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 2 Jun 2020 17:59:10 +0000 (10:59 -0700)
Since commit 25b2995a35b6 ("mm: remove MEMORY_DEVICE_PUBLIC support"),
the assignment to 'page' for pte_devmap case has been unnecessary.
Let's remove it.

[willy@infradead.org: changelog]
Signed-off-by: chenqiwu <chenqiwu@xiaomi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Matthew Wilcox <willy@infradead.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Link: http://lkml.kernel.org/r/1587349685-31712-1-git-send-email-qiwuchen55@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/memory.c

index f703fe8..2143827 100644 (file)
@@ -802,8 +802,6 @@ copy_one_pte(struct mm_struct *dst_mm, struct mm_struct *src_mm,
                get_page(page);
                page_dup_rmap(page, false);
                rss[mm_counter(page)]++;
-       } else if (pte_devmap(pte)) {
-               page = pte_page(pte);
        }
 
 out_set_pte: