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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=9DI5u3KafPzj5V3i+niAdO1uhXW2it0RjumucIpkaOw=; b=Ac7apijX89uchb5yWA5Ivzy0FcN2MOOkAgM9dWUD/5WYubb9MX6wsqwxBz5vmjwC+a YqfO+tDsFLhC9kbw8hOFUlJqnJmJDymYjKtVG2QRD5m1l7o+BMFELDLfRvUwua1etYre BzPNvw1hjky5iJBDNK/rBO6+Ikp4mKF4D9W/60Fb+nU4fgfokVAmTWNMpj4NpQaoxprJ cfJ57qiYi5VAopTk6mRhQBCoJvQdIKSKR+Xng9Ha2BApTUcNmymH6FRJ9KO+CFs2rIGp 3P7Y+rIulkcf0Za0yRMBwzX0cSQgD8M7Z/Fc73tGnVx62A1BViG/sla/2xw71g3m/Vnu RJkQ== X-Gm-Message-State: AOAM533MEFEqoUARj13rOa5qSRAVYakHZDaMZ78xaE3zKmgMs+FKmSK9 1qZXcCnHlxi6vXAQrbN06c0ajLJV/vPA3gHA X-Google-Smtp-Source: ABdhPJzpu4qsDmsSwhmtsakN67Db1oW3vqlMK/6JoYcULaWh7/ua/BL0cxNVhiDmj+hapXuFvoOwNe42CSDioYtU X-Received: from andreyknvl3.muc.corp.google.com ([2a00:79e0:15:13:7220:84ff:fe09:7e9d]) (user=andreyknvl job=sendgmr) by 2002:a0c:b5e1:: with SMTP id o33mr516199qvf.17.1603372784151; Thu, 22 Oct 2020 06:19:44 -0700 (PDT) Date: Thu, 22 Oct 2020 15:19:00 +0200 In-Reply-To: Message-Id: <84dc684519c5de460c58b85f0351c4f9ab57e897.1603372719.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.29.0.rc1.297.gfa9743e501-goog Subject: [PATCH RFC v2 08/21] kasan: remove __kasan_unpoison_stack From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Vincenzo Frascino , Dmitry Vyukov , Alexander Potapenko , Marco Elver X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201022_091948_732883_D3C0A404 X-CRM114-Status: GOOD ( 12.16 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Branislav Rankov , Elena Petrova , linux-mm@kvack.org, Andrey Konovalov , Kevin Brodsky , linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Kostya Serebryany , linux-arm-kernel@lists.infradead.org, Serban Constantinescu , Andrey Ryabinin , Andrew Morton , Peter Collingbourne , Evgenii Stepanov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org There's no need for __kasan_unpoison_stack() helper, as it's only currently used in a single place. Removing it also removes undeed arithmetic. No functional changes. Signed-off-by: Andrey Konovalov Link: https://linux-review.googlesource.com/id/Ie5ba549d445292fe629b4a96735e4034957bcc50 --- mm/kasan/common.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/mm/kasan/common.c b/mm/kasan/common.c index a3e67d49b893..9008fc6b0810 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -59,18 +59,12 @@ void kasan_disable_current(void) #endif /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */ #if CONFIG_KASAN_STACK -static void __kasan_unpoison_stack(struct task_struct *task, const void *sp) -{ - void *base = task_stack_page(task); - size_t size = sp - base; - - kasan_unpoison_memory(base, size); -} - /* Unpoison the entire stack for a task. */ void kasan_unpoison_task_stack(struct task_struct *task) { - __kasan_unpoison_stack(task, task_stack_page(task) + THREAD_SIZE); + void *base = task_stack_page(task); + + kasan_unpoison_memory(base, THREAD_SIZE); } /* Unpoison the stack for the current task beyond a watermark sp value. */ -- 2.29.0.rc1.297.gfa9743e501-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel