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a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1772007155; h=from:from:sender: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: in-reply-to:in-reply-to:references:references; bh=26Heb3z8+JRGyYR/K9qQ4p1lo9b1s7t7d4idtz27MvU=; b=v9qrM+c5XjigMpdhI45i/zS48wqXP8E8LwGz2M9H+cU5vqMUtG/A2nkxY/pOkJkavFnYdZ vOA3m3zFTl2AJj96bLltdgEb0CGYnEvqc0+oWbSXpykruRZrztaMRt85vnBOLs+72U7weY rW0lt660005tz68F9l7BIP25Q2xzBrU= Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E79E6165C; Wed, 25 Feb 2026 00:12:27 -0800 (PST) Received: from arm.com (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 40DC83F59E; Wed, 25 Feb 2026 00:12:31 -0800 (PST) Date: Wed, 25 Feb 2026 08:12:28 +0000 From: Catalin Marinas To: "Edgecombe, Rick P" Cc: "david@kernel.org" , "broonie@kernel.org" , "akpm@linux-foundation.org" , "debug@rivosinc.com" , "linux-kernel@vger.kernel.org" , "linux-riscv@lists.infradead.org" , "bp@alien8.de" , "dave.hansen@linux.intel.com" , "pjw@kernel.org" , "alex@ghiti.fr" , "aou@eecs.berkeley.edu" , "palmer@dabbelt.com" , "will@kernel.org" , "tglx@kernel.org" , "hpa@zytor.com" , "mingo@redhat.com" , "linux-mm@kvack.org" , "linux-arm-kernel@lists.infradead.org" Subject: Re: [PATCH 4/5] x86: shstk: Use the new common vm_mmap_shadow_stack() helper Message-ID: References: <20260224175800.2500729-1-catalin.marinas@arm.com> <20260224175800.2500729-5-catalin.marinas@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: 3egsaghsiqkkaeh3hr15w1fkkbqtrksz X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 00B374000A X-HE-Tag: 1772007154-535377 X-HE-Meta: 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 vfTfpTKC p0ZD9WlXGbWlys4i8G1IDTfp5H7Wmoie6E0QANZ47CxPZGaHhEiJwUE+Adbi+qRf3IUOe6IvPV2icAoZA9VTkrrjBR9I1UhslTSUmoGg2YnyHF/3qFitqUaGb1mM6LZde9pcpTPRIXIso5wly0+32YK7IZwPYLshxY4yuoLdnnuiamv8zfSqIj9LDfKdVJHhxbbw3NjpFO5hjU8QzUcdcIGW1MdotKmqBh8WCrFtokv0xv34fd0vkPatVjAo2PfGYIo+d Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Feb 24, 2026 at 07:47:14PM +0000, Edgecombe, Rick P wrote: > On Tue, 2026-02-24 at 17:57 +0000, Catalin Marinas wrote: > > Replace part of the x86 alloc_shstk() content with a call to > > vm_mmap_shadow_stack(). > > I ran it through the selftest. It would be nice to have a bit more information > in the log, like that there is no functional change. Otherwise, Good point, I'll add this to the other arch patches as well. > Reviewed-by: Rick Edgecombe > Tested-by: Rick Edgecombe Thanks. -- Catalin