From mboxrd@z Thu Jan 1 00:00:00 1970 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 4706E3D5259 for ; Wed, 25 Feb 2026 16:14:18 +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=1772036058; cv=none; b=AnxtVLX14pDcPPAairTM+kUlIFWx01QO5yLXgb3boDBlIZseeYN9qKb6W5t0RWQ338+sSaDZd2c19L/G/dIqh14TJuMQtSyWPbsZ17lx8O20PBXKIg3WsQ8RMSi5Qfkb6vTP++97pESj6U0VNDr4QbGJzSNg6631kyQfkzqNzYY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772036058; c=relaxed/simple; bh=mzIbdOUzUlovxymqBnj+kYDKgwOIfUhH5KXcm/SyWrs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XuhdY5MSOk+C6IjrkWQWqU7BulYpuwd5RtiwEdLrk6lAj3GWxXyuGvKrIR50TkpdU9H7n7SCW0CPERgUKR8Z2JSwAd5QudKtIh7/vx2P0xZzWkG43RGQ+FmoAtR/fLN5oUEhAdSgklquV6otQi/zy1R+ZfgW7pI/lg/lxJWlepI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id A2D49C2BC9E; Wed, 25 Feb 2026 16:14:14 +0000 (UTC) From: Catalin Marinas To: Andrew Morton , David Hildenbrand , Mark Brown , Deepak Gupta , Rick Edgecombe Cc: Will Deacon , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-mm@kvack.org Subject: [PATCH v2 2/5] arm64: gcs: Use the new common vm_mmap_shadow_stack() helper Date: Wed, 25 Feb 2026 16:13:59 +0000 Message-ID: <20260225161404.3157851-3-catalin.marinas@arm.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260225161404.3157851-1-catalin.marinas@arm.com> References: <20260225161404.3157851-1-catalin.marinas@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Replace the arm64 map_shadow_stack() content with a call to vm_mmap_shadow_stack(). There is no functional change. Signed-off-by: Catalin Marinas Reviewed-by: David Hildenbrand (Arm) Reviewed-by: Mark Brown Cc: Will Deacon --- arch/arm64/mm/gcs.c | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-) diff --git a/arch/arm64/mm/gcs.c b/arch/arm64/mm/gcs.c index 04a23a497f20..680749611a9a 100644 --- a/arch/arm64/mm/gcs.c +++ b/arch/arm64/mm/gcs.c @@ -12,19 +12,7 @@ static unsigned long alloc_gcs(unsigned long addr, unsigned long size) { - int flags = MAP_ANONYMOUS | MAP_PRIVATE; - struct mm_struct *mm = current->mm; - unsigned long mapped_addr, unused; - - if (addr) - flags |= MAP_FIXED_NOREPLACE; - - mmap_write_lock(mm); - mapped_addr = do_mmap(NULL, addr, size, PROT_READ, flags, - VM_SHADOW_STACK | VM_WRITE, 0, &unused, NULL); - mmap_write_unlock(mm); - - return mapped_addr; + return vm_mmap_shadow_stack(addr, size, 0); } static unsigned long gcs_size(unsigned long size)