From nobody Thu Oct 9 02:51:05 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 28FAE25F98D for ; Fri, 20 Jun 2025 11:10:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750417850; cv=none; b=Z1AbDU9v03xbW2F3Xsp/IUwtxWMQyqQ91BChvOsNYcNICnl0uNw/NXrlzEYk2/Hvmbfsqbu9nI0AsAPR5oPeB0gj4p176qiSBGriwXlRAqU2FIi0Prr+POLpni2EWjB3Fuh56oHVa0oh+DCl9MBuH+Bk08LmJFlHX2cEsFwULKU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750417850; c=relaxed/simple; bh=svtDzZdrbdSl/3pbNWLxGgua09eH0cIx0j2lbmFQQ6Y=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=uifZjX/2iyoNYn6/vCxj6/hXW3VbAbfvAMjJCglsh+JtMwdOXY8XHDknqt0viwbyYgx1raM6FpJEGP3o4QcujCPcEtSuYQ5Z6dWv+Xg7ASnnRNwxKpIREqEUnw9qlKb1gNsYpK7pf5rJQpHUO8I/x9rKfMJoyWFPdtuq0ejWgX4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OE/g/KUq; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="OE/g/KUq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A9B5EC4CEE3; Fri, 20 Jun 2025 11:10:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750417849; bh=svtDzZdrbdSl/3pbNWLxGgua09eH0cIx0j2lbmFQQ6Y=; h=From:To:Cc:Subject:Date:From; b=OE/g/KUqf6uDvHAIqq2sQf/EQI/0gI93Jut3ZlNqhccuKnf6/PxUMDSGxLZeUlqpB bd+ax3IAwKsyKNGZwjpE/Ezpr5EnButk0yzGY+Y2LHoUgNdYO7EjC+LxAu9N5oW6h7 pnCMRHXmWcPR4v7x0fuUvkj/xC06+6BIw7kYXusfa68/irxvjtbEafa4p8FyrpCsUj rfB+nxOsQC8tI9m4r+QtgtU5KpdtDM2fjjBCiAU8mSCllI+/1/skNEoQTxocPUqlWZ UHRpT9BypJLuUuIUa2nvwbAjRSvpeLd7DQxe+h9939UaZvS4YvlMnvd+kUdSfhHTxC 37qirA946Vpyw== From: Arnd Bergmann To: Catalin Marinas , Will Deacon Cc: Arnd Bergmann , Jonathan Cameron , Gavin Shan , Jean-Philippe Brucker , James Morse , Douglas Anderson , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] arm64: move smp_send_stop() cpu mask off stack Date: Fri, 20 Jun 2025 13:10:41 +0200 Message-Id: <20250620111045.3364827-1-arnd@kernel.org> X-Mailer: git-send-email 2.39.5 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Arnd Bergmann For really large values of CONFIG_NR_CPUS, a CPU mask value should not be put on the stack: arch/arm64/kernel/smp.c:1188:1: error: the frame size of 8544 bytes is larg= er than 1536 bytes [-Werror=3Dframe-larger-than=3D] This could be achieved using alloc_cpumask_var(), which makes it depend on CONFIG_CPUMASK_OFFSTACK, but as this function is already serialized and can only run on one CPU, making the variable 'static' is easier. Signed-off-by: Arnd Bergmann Reviewed-by: Catalin Marinas --- arch/arm64/kernel/smp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 15987100c0cf..5c605dc7f5be 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -1107,7 +1107,7 @@ static inline unsigned int num_other_online_cpus(void) void smp_send_stop(void) { static unsigned long stop_in_progress; - cpumask_t mask; + static cpumask_t mask; unsigned long timeout; =20 /* --=20 2.39.5