From nobody Wed Apr 1 12:49:51 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 C82883D6CA4; Tue, 31 Mar 2026 08:02:08 +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=1774944130; cv=none; b=HWtKegpTrhh9hy+nNkNCXbf1jveE5jYdhTQ/1MIIaCXRxGd/sGTnGg1Cwsfrd6L1UbRVr2K2PgkQYGV/Ag1w9tb3z31qqKXuz5/a05piN/IXXUgrxHDg3tF6QkIkyFuvIRYTqq/YP2QFDvc7qUg1P5u2pM/mZHd+48R7TbO20zA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774944130; c=relaxed/simple; bh=K5Q2tmpro/hRxUU+iYl9ef/itnMl4Yi6ADYe80AG3SI=; h=Date:From:To:Subject:Cc:In-Reply-To:References:MIME-Version: Message-ID:Content-Type; b=uq/BI1tT+n/hsoa3VR4hIjriC4qG3sOjYlJK4YO2QKjzkBsA7681RPQLyYLhd13hUHWrWGVA1D7z7la7FFAnte3jai/V0RfUsUfp5hRXl8j0ZHIDJR0hsRLJWyxn01g3RYtdDndMTQucWSgP0ifdjobD/EfQJYx+SWNNcWcfNH4= 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=KR/YFeb6; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=zrzjgynq; 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="KR/YFeb6"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="zrzjgynq" Date: Tue, 31 Mar 2026 08:02:04 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1774944126; 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=BTUmawlNl5OU7BAUSGPz3xbfvk7rwD/mKo+o6au1Qj4=; b=KR/YFeb6OZ3w03BBgEPbmCEzALN1V+6WHj49hJtbiBTXlTYJ/pA/BJ6SkgtHfL6nZopCxM rs5RuBS6DBKqcQkk28FCOecB3+9GizY+RZYHc5XhrolWtW7baKgZWR0ZKqtfSKefBka3Km BUHlR/EoH9OWOODRC+faj3UKpOfAQRGVGrL9KNiWD0NP/ZlVT4GnxCU8tVnigGa3VrL82a pJ0UIrrT7sLHtOa4LiuBGpcpCBPDxYigWDoSTK6DMQc2iCumFlnZFCWvvsXvi98oiqCGBF 51IvYlmJskh3NoT575zKqvNliUHl58iVokqHNdtRmIPy+q9bKYSLuh0cUxohQg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1774944126; 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=BTUmawlNl5OU7BAUSGPz3xbfvk7rwD/mKo+o6au1Qj4=; b=zrzjgynqBzbPIpmSao4jWCE+4zXm0uTxm+rZzUO0E8c3lw8MDCQrUEYruXY7C26XhHKtZX guIytH0d9BlkC1DQ== 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/process/32: Use correct type for 'gs' variable in __show_regs() to avoid zero-extension Cc: Uros Bizjak , Ingo Molnar , "H. Peter Anvin" , Linus Torvalds , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20260330085938.67985-3-ubizjak@gmail.com> References: <20260330085938.67985-3-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: <177494412478.1647592.1608216373368905910.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: 6829f19810e96903d7b532145c3d1701b4d9a0f6 Gitweb: https://git.kernel.org/tip/6829f19810e96903d7b532145c3d1701b= 4d9a0f6 Author: Uros Bizjak AuthorDate: Mon, 30 Mar 2026 10:59:22 +02:00 Committer: Ingo Molnar CommitterDate: Tue, 31 Mar 2026 09:50:10 +02:00 x86/process/32: Use correct type for 'gs' variable in __show_regs() to avoi= d zero-extension Change the type of 'gs' variable in __show_regs() from 'unsigned short' to 'unsigned int'. This prevents unwanted zero-extension when storing the 16-bit segment register into a wider general purpose register. The code improves from: 50: 8c ee mov %gs,%esi 52: 0f b7 f6 movzwl %si,%esi ... be: 89 74 24 14 mov %esi,0x14(%esp) to: 50: 8c ef mov %gs,%edi ... bb: 89 7c 24 14 mov %edi,0x14(%esp) No functional change intended. Signed-off-by: Uros Bizjak Signed-off-by: Ingo Molnar Cc: H. Peter Anvin Cc: Linus Torvalds Link: https://patch.msgid.link/20260330085938.67985-3-ubizjak@gmail.com --- arch/x86/kernel/process_32.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index 3ef15c2..168dabf 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -61,7 +61,7 @@ void __show_regs(struct pt_regs *regs, enum show_regs_mod= e mode, { unsigned long cr0 =3D 0L, cr2 =3D 0L, cr3 =3D 0L, cr4 =3D 0L; unsigned long d0, d1, d2, d3, d6, d7; - unsigned short gs; + unsigned int gs; =20 savesegment(gs, gs); =20