From nobody Sun Feb 8 14:56:53 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 44E1A1F4CAD; Tue, 4 Mar 2025 19:33:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741116837; cv=none; b=uhcdR+LSF+hYriCyq0CEfpFooyYI/Dafvr5heLphL15ew9n/y+7G0I95HFVIvxo29fD8iugD0qDXlqdKpqTp2eu5gLMoDzRDiIFSG2RbNqnR/9aXJksYanKMZIEAOABjxrxpITWqUrCROtrIO5E7tXOE700Qy8wia77Dz3xZwzg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741116837; c=relaxed/simple; bh=slzexu5Q7zsRfSWaIiDt0CaTuNTHqt1yn4qswhkqhiY=; h=Date:From:To:Subject:Cc:In-Reply-To:References:MIME-Version: Message-ID:Content-Type; b=hMVDenYfUdWqoo1dz/+E5IZLv6muSHvmAYZxMO6PNDIR1GwXPq0b7AHGm9oAcjjCsjYWXonbvzUhMGY3dc3thrKn0BvlNOWW66Q/vLdufxNgV/iPNe/3LHjU28wwosbHJDPNG29mpl1AhphOjeQbXeaDmbMKOaUXXblmOyjdI1w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=vcO75E0k; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=eJyOgo7U; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="vcO75E0k"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="eJyOgo7U" Date: Tue, 04 Mar 2025 19:33:53 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1741116834; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=icICM/aywSzmYgFr0ZB2vFPoIqH6Y4Fl2ShAzOfp3w0=; b=vcO75E0k7qD+naRPM3IZl7PA1zfyqH/RooYVjEZOo9yIgeFCfHOWq5Esee1FWWDL0wyk94 bSCY+vNaYvl3tA5Lh2Rsr/BUiLoIzgtWfckD9HzK//ZWndvke8oIBOCl1LqD06YjdwQzA4 hmNZ69uRXSowyvYILagruftkkNZBhG/f307NARJiB5bZnxbJIEMj0afKqdkhxkYS/hOvKb Ng/8+cuff/DLSuPQpAXMCSIzwGN9sd1DyRmtzDVW3gLmTq0dBg0WDq6MY6CTyJtwE5uHK2 gFt/zMvugAhlWkrCpws5p5dGTNWv4XFatxTxD2NAiB+HmLeMxt7aOmOljSSPYQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1741116834; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=icICM/aywSzmYgFr0ZB2vFPoIqH6Y4Fl2ShAzOfp3w0=; b=eJyOgo7U6Ol3zI3OKTHTUg+Or9LTW6wWRuUAN/SMEQiM5e0Vsu+P3ddms1OZYoel4sy4Ta Tc7toU8zlzdQNiAw== From: "tip-bot2 for Uros Bizjak" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: x86/asm] x86/irq/32: Use current_stack_pointer to avoid asm() in check_stack_overflow() Cc: Uros Bizjak , Ingo Molnar , Andy Lutomirski , Brian Gerst , "H. Peter Anvin" , Linus Torvalds , Peter Zijlstra , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20250303155446.112769-4-ubizjak@gmail.com> References: <20250303155446.112769-4-ubizjak@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <174111683395.14745.9568647485119144899.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Precedence: bulk Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable The following commit has been merged into the x86/asm branch of tip: Commit-ID: d4432fb5b8798a7663974bed277a8a6e330a50d8 Gitweb: https://git.kernel.org/tip/d4432fb5b8798a7663974bed277a8a6e3= 30a50d8 Author: Uros Bizjak AuthorDate: Mon, 03 Mar 2025 16:54:24 +01:00 Committer: Ingo Molnar CommitterDate: Tue, 04 Mar 2025 20:28:58 +01:00 x86/irq/32: Use current_stack_pointer to avoid asm() in check_stack_overflo= w() Make code more readable by using the 'current_stack_pointer' global variabl= e. Signed-off-by: Uros Bizjak Signed-off-by: Ingo Molnar Cc: Andy Lutomirski Cc: Brian Gerst Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20250303155446.112769-4-ubizjak@gmail.com --- arch/x86/kernel/irq_32.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c index eab4580..8c7babb 100644 --- a/arch/x86/kernel/irq_32.c +++ b/arch/x86/kernel/irq_32.c @@ -31,10 +31,7 @@ int sysctl_panic_on_stackoverflow __read_mostly; /* Debugging check for stack overflow: is there less than 1KB free? */ static int check_stack_overflow(void) { - long sp; - - __asm__ __volatile__("andl %%esp,%0" : - "=3Dr" (sp) : "0" (THREAD_SIZE - 1)); + unsigned long sp =3D current_stack_pointer & (THREAD_SIZE - 1); =20 return sp < (sizeof(struct thread_info) + STACK_WARN); }