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 19928A59 for ; Mon, 17 Mar 2025 05:09:27 +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=1742188168; cv=none; b=bvkQQaCd/V1qT1FmzcJ3LCq2vhat1Uju7+bLQTXrtR4VSuQkgwYz6iqk/5P0Jk2V/TKLGnsLTZbvADxbjWoAcC3qQbl8GqSTjlwNkBUO2Ev2AKZTxyZfA6FJp2Azo3lniA3wzjUpnUh+V7qWetBP8dEzgEfUzy45V+OTFfIMBHA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742188168; c=relaxed/simple; bh=xafF7aXVxVfhfOzM/sbca6oiq18sUyyLCdrctmnB83E=; h=Date:To:From:Subject:Message-Id; b=Fa/CQN+AUsWUBPzlPmYR+MozE1jqOmAPxVDTwLurmOP8JpCYWbxBDZOit8WqtPf/UQ86kc4Px+TnExxYVbR8+cNbcff/hRk7PYcnE3ami5SY9nt36apF3iA8ATq9p3CZsllDEji/vb2elYZjGCWvSO3WR8GsvLZCSgpu+nSMJXQ= 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=zoagb4GH; 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="zoagb4GH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7A5BBC4CEEC; Mon, 17 Mar 2025 05:09:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1742188167; bh=xafF7aXVxVfhfOzM/sbca6oiq18sUyyLCdrctmnB83E=; h=Date:To:From:Subject:From; b=zoagb4GHa8OpKwwV80azlz7eILmgC3owEP4PCOTz1y4+AiCa4ovn8xW1FwZDlGm9R jA4IGmnO2BLrE/X3m/Cvdw3Wd0+Uyf6Fc3RgQX9hjUEQ9UztkTQ9bwH1qpuj7bd3uV HULfwZ/upNOHOuao3+vzmcvP9U3+PNRhoajc38l8= Date: Sun, 16 Mar 2025 22:09:26 -0700 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: <20250317050927.7A5BBC4CEEC@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: Mon, 27 Jan 2025 17:05:10 +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/20250127160709.80604-7-ubizjak@gmail.com Signed-off-by: Uros Bizjak Acked-by: Nadav Amit Cc: 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 | 15 ++++++++++++--- 1 file changed, 12 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 +95,18 @@ #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))) +#if defined(CONFIG_USE_X86_SEG_SUPPORT) && defined(USE_TYPEOF_UNQUAL) +# 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