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Wed, 25 Jan 2023 15:36:00 -0800 (PST) Date: Wed, 25 Jan 2023 15:35:48 -0800 In-Reply-To: <20230125233554.153109-1-surenb@google.com> Mime-Version: 1.0 References: <20230125233554.153109-1-surenb@google.com> X-Mailer: git-send-email 2.39.1.456.gfc5497dd1b-goog Message-ID: <20230125233554.153109-2-surenb@google.com> Subject: [PATCH v3 1/7] kernel/fork: convert vma assignment to a memcpy From: Suren Baghdasaryan To: akpm@linux-foundation.org Cc: michel@lespinasse.org, jglisse@google.com, mhocko@suse.com, vbabka@suse.cz, hannes@cmpxchg.org, mgorman@techsingularity.net, dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, peterz@infradead.org, ldufour@linux.ibm.com, paulmck@kernel.org, mingo@redhat.com, will@kernel.org, luto@kernel.org, songliubraving@fb.com, peterx@redhat.com, david@redhat.com, dhowells@redhat.com, hughd@google.com, bigeasy@linutronix.de, kent.overstreet@linux.dev, punit.agrawal@bytedance.com, lstoakes@gmail.com, peterjung1337@gmail.com, rientjes@google.com, axelrasmussen@google.com, joelaf@google.com, minchan@google.com, jannh@google.com, shakeelb@google.com, tatashin@google.com, edumazet@google.com, gthelen@google.com, gurua@google.com, arjunroy@google.com, soheil@google.com, hughlynch@google.com, leewalsh@google.com, posk@google.com, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-kernel@vger.kernel.org, kernel-team@android.com, surenb@google.com X-Rspamd-Queue-Id: 9235BA0003 X-Stat-Signature: 8zundgufank5t93fppdggz4ot45o1wry X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1674689761-672383 X-HE-Meta: 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 t6LzOD/4 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 Acked-by: Mel Gorman --- 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); }