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 2821923D3C8 for ; Tue, 14 Jan 2025 06:44:40 +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=1736837080; cv=none; b=n9Ef8g81MN2TRAv2eH0tls3Bza5DMp/Quj5oTXuOo0coIOMfinD9nVM3RbHqCX0vJqIxScbZYRgHu1uk4KcuthqE+Eojr/XpUOVjMVEnfPzahHgafFgvNoTMwe08Qn+zW6g25TcDSmhTaRTTYH9GfsJ2jCsRlmyR1bfGHKcQBLw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736837080; c=relaxed/simple; bh=dDnVWvEjMR2X/RLKjicCO7+nwv3DwOcJY63YC248zhw=; h=Date:To:From:Subject:Message-Id; b=atPZSSFs+bx0S0ENUU0SNyHmzEFHEBpdrfkY2SZd33tcHApkAgmzwHC4dy9Y+QlBNk1SH50aY6UYoV78OGzOBsbg+cckluf2PMocs8WlhPbX9LaqcoZCvOM0u8VldfDa6txXfA6+pK+4K/xpU9V3pwxyjJzq3hGvbqG5wbEtits= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=AvYvriAt; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="AvYvriAt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F0090C4CEE4; Tue, 14 Jan 2025 06:44:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1736837080; bh=dDnVWvEjMR2X/RLKjicCO7+nwv3DwOcJY63YC248zhw=; h=Date:To:From:Subject:From; b=AvYvriAt/65foDUPeRVRFR/sWic9RctjzKMYfAGEqFhDc0XW/d+xXHvEPn6S/7oTy 9MDZ7s+7a6c7TUdl0cVLKpCPBLzlGsK5KMezW5z6EEvQov5Wvy5eBdCph1W00Nx/6C rHSpgniBWEuT6MhPtlgz4kenumOfF6ZixuHoi1Gg= Date: Mon, 13 Jan 2025 22:44:39 -0800 To: mm-commits@vger.kernel.org,will@kernel.org,torvalds@linux-foundation.org,tj@kernel.org,tglx@linutronix.de,peterz@infradead.org,pabeni@redhat.com,nadav.amit@gmail.com,mingo@kernel.org,luto@kernel.org,longman@redhat.com,kuba@kernel.org,kent.overstreet@linux.dev,hpa@zytor.com,edumazet@google.com,dvlasenk@redhat.com,dennis@kernel.org,davem@davemloft.net,dave.hansen@linux.intel.com,cl@linux.com,brgerst@gmail.com,bp@alien8.de,boqun.feng@gmail.com,arnd@arndb.de,ubizjak@gmail.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] percpu-x86-enable-strict-percpu-checks-via-named-as-qualifiers.patch removed from -mm tree Message-Id: <20250114064439.F0090C4CEE4@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: percpu/x86: enable strict percpu checks via named AS qualifiers has been removed from the -mm tree. Its filename was percpu-x86-enable-strict-percpu-checks-via-named-as-qualifiers.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Uros Bizjak Subject: percpu/x86: enable strict percpu checks via named AS qualifiers Date: Sun, 8 Dec 2024 21:45:21 +0100 This patch declares percpu variables in __seg_gs/__seg_fs named AS and keeps them named AS qualified until they are dereferenced with percpu accessor. This approach enables various compiler check for cross-namespace variable assignments. Link: https://lkml.kernel.org/r/20241208204708.3742696-7-ubizjak@gmail.com Signed-off-by: Uros Bizjak Acked-by: Nadav Amit Acked-by: Dennis Zhou Cc: Tejun Heo Cc: Christoph Lameter Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: "H. Peter Anvin" Cc: Linus Torvalds Cc: Andy Lutomirski Cc: Brian Gerst Cc: Peter Zijlstra Cc: Arnd Bergmann Cc: Boqun Feng Cc: "David S. Miller" Cc: Denys Vlasenko Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Kent Overstreet Cc: Paolo Abeni Cc: Waiman Long Cc: Will Deacon Signed-off-by: Andrew Morton --- arch/x86/include/asm/percpu.h | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) --- a/arch/x86/include/asm/percpu.h~percpu-x86-enable-strict-percpu-checks-via-named-as-qualifiers +++ a/arch/x86/include/asm/percpu.h @@ -95,9 +95,23 @@ #endif /* CONFIG_SMP */ -#define __my_cpu_type(var) typeof(var) __percpu_seg_override -#define __my_cpu_ptr(ptr) (__my_cpu_type(*(ptr))*)(__force uintptr_t)(ptr) -#define __my_cpu_var(var) (*__my_cpu_ptr(&(var))) +/* + * XXX: Remove test for __CHECKER__ once + * sparse learns about __typeof_unqual__. + */ +#if defined(CONFIG_USE_X86_SEG_SUPPORT) && \ + defined(CONFIG_CC_HAS_TYPEOF_UNQUAL) && !defined(__CHECKER__) +# define __my_cpu_type(var) typeof(var) +# define __my_cpu_ptr(ptr) (ptr) +# define __my_cpu_var(var) (var) + +# define __percpu_qual __percpu_seg_override +#else +# define __my_cpu_type(var) typeof(var) __percpu_seg_override +# define __my_cpu_ptr(ptr) (__my_cpu_type(*(ptr))*)(__force uintptr_t)(ptr) +# define __my_cpu_var(var) (*__my_cpu_ptr(&(var))) +#endif + #define __percpu_arg(x) __percpu_prefix "%" #x #define __force_percpu_arg(x) __force_percpu_prefix "%" #x _ Patches currently in -mm which might be from ubizjak@gmail.com are