From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 C6C313750CB for ; Tue, 25 Aug 2026 01:55:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787622946; cv=none; b=kX1rBSSeIivklnt8zJj7Jh8eQvU/Co/PJseY0+jJ3jQlu+PHuR2At3dIBuix03P/zFLTRaE3dSJSXAIawCJN5xa5wSJ/DwoCjplGvV/SFGQ7dM68XTXtFVgYYU+Rir1i27fNmOQwugiydJSefS+gwMA8miBrSl1gKtaTD6CPicM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787622946; c=relaxed/simple; bh=kx158mgIy4hfqT+1SJc+pKnTJ00MretiwGEQYawtugw=; h=Date:To:From:Subject:Message-Id; b=uolCozfq98bQFdE4v6Ro61gbrLdq4tCGyDaC8kJVUBpAOYuU27I7JfbKakiV0wx7YY3pxQwXudnRBlOzuHv2dikmCk6usCVFvvdJ6rBoJqL5gNqju4YqTYgAAylMq0YRmjHR8R0mKkAKfPHkKEwPULy6jYEK7Eef/iQ0czTVD+o= 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=OgPx14xd; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="OgPx14xd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6448F1F00A3A; Tue, 25 Aug 2026 01:55:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1787622944; bh=EOKA3MuC8ostdnu3hfZ4LLWhPDG2246O/thkpxU1rTc=; h=Date:To:From:Subject; b=OgPx14xdRgcGuYgidxNRJ/ia4PphFQWJPVHYlDe+XbX3xV7vWOeyS6VIsb27GR6Ds mS3pIz0ks2Pwgpj0Ah9nGwtMo65vR4N1JwiSlSs3wws3Yd3tpxFEXQohIiP5CJiquq GaXsMafEY923HPRFr9nW2gqzAwtfwMxHsMYQIO/0= Date: Mon, 24 Aug 2026 18:55:44 -0700 To: mm-commits@vger.kernel.org,surenb@google.com,rostedt@goodmis.org,kent.overstreet@linux.dev,gmonaco@redhat.com,dennis@kernel.org,akpm@linux-foundation.org,tj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] percpu-drop-config_debug_force_weak_per_cpu.patch removed from -mm tree Message-Id: <20260825015544.6448F1F00A3A@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: drop CONFIG_DEBUG_FORCE_WEAK_PER_CPU has been removed from the -mm tree. Its filename was percpu-drop-config_debug_force_weak_per_cpu.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: Tejun Heo Subject: percpu: drop CONFIG_DEBUG_FORCE_WEAK_PER_CPU Date: Wed, 12 Aug 2026 09:47:43 -1000 alpha requires percpu variables in modules to be defined as weak so that the compiler generates GOT based external references for them. This puts two extra restrictions on percpu variable definitions. The symbol must be globally unique even when static and a static percpu variable can't be defined inside a function. DEBUG_FORCE_WEAK_PER_CPU exists to give generic code build coverage for these restrictions without building for alpha. MEM_ALLOC_PROFILING defines a static percpu counter at each allocation call site and thus can't be built with weak percpu definitions, so it depends on !DEBUG_FORCE_WEAK_PER_CPU. As allmodconfig enables DEBUG_FORCE_WEAK_PER_CPU, this knocks MEM_ALLOC_PROFILING out of allmodconfig build coverage. allmodconfig coverage for MEM_ALLOC_PROFILING is worth more than build coverage for restrictions which only matter to alpha module builds. Drop DEBUG_FORCE_WEAK_PER_CPU. Restriction violations will now show up only on alpha builds. Link: https://lore.kernel.org/178656406317.2437052.7257990869957704195@slm.duckdns.org Signed-off-by: Tejun Heo Reported-by: Andrew Morton Reviewed-by: Suren Baghdasaryan Acked-by: Gabriele Monaco [include/rv/da_monitor.h] Cc: Dennis Zhou Cc: Kent Overstreet Cc: Steven Rostedt Signed-off-by: Andrew Morton --- include/linux/percpu-defs.h | 7 +------ include/rv/da_monitor.h | 2 +- lib/Kconfig.debug | 15 --------------- mm/Kconfig.debug | 1 - 4 files changed, 2 insertions(+), 23 deletions(-) --- a/include/linux/percpu-defs.h~percpu-drop-config_debug_force_weak_per_cpu +++ a/include/linux/percpu-defs.h @@ -65,13 +65,8 @@ * * Archs which need weak percpu definitions should set * CONFIG_ARCH_MODULE_NEEDS_WEAK_PER_CPU when necessary. - * - * To ensure that the generic code observes the above two - * restrictions, if CONFIG_DEBUG_FORCE_WEAK_PER_CPU is set weak - * definition is used for all cases. */ -#if (defined(CONFIG_ARCH_MODULE_NEEDS_WEAK_PER_CPU) && defined(MODULE)) || \ - defined(CONFIG_DEBUG_FORCE_WEAK_PER_CPU) +#if defined(CONFIG_ARCH_MODULE_NEEDS_WEAK_PER_CPU) && defined(MODULE) /* * __pcpu_scope_* dummy variable is used to enforce scope. It * receives the static modifier when it's used in front of --- a/include/rv/da_monitor.h~percpu-drop-config_debug_force_weak_per_cpu +++ a/include/rv/da_monitor.h @@ -24,7 +24,7 @@ /* * Per-cpu variables require a unique name although static in some - * configurations (e.g. CONFIG_DEBUG_FORCE_WEAK_PER_CPU or alpha modules). + * configurations (e.g. alpha modules). */ #define DA_MON_NAME CONCATENATE(da_mon_, MONITOR_NAME) --- a/lib/Kconfig.debug~percpu-drop-config_debug_force_weak_per_cpu +++ a/lib/Kconfig.debug @@ -613,21 +613,6 @@ config BUILTIN_MODULE_RANGES It also records an anchor symbol to determine the load address of the section. -config DEBUG_FORCE_WEAK_PER_CPU - bool "Force weak per-cpu definitions" - depends on DEBUG_KERNEL - help - s390 and alpha require percpu variables in modules to be - defined weak to work around addressing range issue which - puts the following two restrictions on percpu variable - definitions. - - 1. percpu symbols must be unique whether static or not - 2. percpu variables can't be defined inside a function - - To ensure that generic code follows the above rules, this - option forces all percpu variables to be defined as weak. - config WARN_CONTEXT_ANALYSIS bool "Compiler context-analysis warnings" depends on CC_IS_CLANG && CLANG_VERSION >= 230000 --- a/mm/Kconfig.debug~percpu-drop-config_debug_force_weak_per_cpu +++ a/mm/Kconfig.debug @@ -326,7 +326,6 @@ config MEM_ALLOC_PROFILING default n depends on MMU depends on PROC_FS - depends on !DEBUG_FORCE_WEAK_PER_CPU select CODE_TAGGING select PAGE_EXTENSION select SLAB_OBJ_EXT _ Patches currently in -mm which might be from tj@kernel.org are