Subject: [PATCH v4 1/7] kernel/fork: convert vma assignment to a memcpy

From: Suren Baghdasaryan <[email-masked]>
Date: Thu, 26 Jan 2023 11:37:46 -0800

Convert vma assignment in vm_area_dup() to a memcpy() to prevent compiler
errors when we add a const modifier to vma->vm_flags.

Signed-off-by: Suren Baghdasaryan <[email-masked]>
Acked-by: Mel Gorman <[email-masked]>
---
 kernel/fork.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index 441dcec60aae..9260f975b8f4 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -472,7 +472,7 @@ struct vm_area_struct *vm_area_dup(struct vm_area_struct *orig)
 		 * orig->shared.rb may be modified concurrently, but the clone
 		 * will be reinitialized.
 		 */
-		*new = data_race(*orig);
+		data_race(memcpy(new, orig, sizeof(*new)));
 		INIT_LIST_HEAD(&new->anon_vma_chain);
 		dup_anon_vma_name(orig, new);
 	}
-- 
2.39.1