linux-kernel - [PATCH v3 1/7] kernel/fork: convert vma assignment to a memcpy

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Message-ID: <20230125233554.153109-2-surenb@google.com>
Date:   Wed, 25 Jan 2023 15:35:48 -0800
From:   Suren Baghdasaryan <surenb@...gle.com>
To:     akpm@...ux-foundation.org
Cc:     michel@...pinasse.org, jglisse@...gle.com, mhocko@...e.com,
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Subject: [PATCH v3 1/7] kernel/fork: convert vma assignment to a memcpy

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 <surenb@...gle.com>
---
 kernel/fork.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index 6683c1b0f460..a531901859d9 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -482,7 +482,7 @@ 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);
+		memcpy(new, orig, sizeof(*new));
 		INIT_LIST_HEAD(&new->anon_vma_chain);
 		dup_anon_vma_name(orig, new);
 	}
-- 
2.39.1