From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pz2-f1.google.com (mail-pz2-f1.google.com [74.125.228.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 999743D647E for ; Wed, 2 Sep 2026 07:32:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.228.1 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788334359; cv=none; b=Ij1Z+76qhSJ8kqZR1siI3CPNsF3nAzn6PC4zktBrCuHCzRXuDJghBkeohzq2hfI328W/MQrUzb/fs+A7V3RyPhnrBEf1niAXsoJsUDCuj2ie+OC9PDnh1d56x8R3kG7mOMTtc+ggIxxr2RO/Vi1gRoHwyVEm6wgFktBCZQa6Y2I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788334359; c=relaxed/simple; bh=M8mUvhcvfnEDBFtUc0VuhdtpXKf34yjgQcgAYje1vMc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=r9q51FdCe6NvHAflcVSDX0bY8OJiUi2pCwcueuDBM5MLCSVpzxTbmiOjuK3sXVN9sANURr633IeSNbXDFW7PRpF2wvVy3MLwsw279Lfxbb4H+mQxUhnGZ1bL6NjEN1aesNWuuYKBKiq0lOwmPMuD7BBE815FNNOeTsjxpbtY83M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=ISNuChhN; arc=none smtp.client-ip=74.125.228.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ISNuChhN" Received: by mail-pz2-f1.google.com with SMTP id 41be03b00d2f7-c9fe62e0da3so237478a12.1 for ; Wed, 02 Sep 2026 00:32:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1788334358; x=1788939158; darn=lists.linux.dev; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=QDn9kL+O/DcgCowWQhzjL1E+vRjYGvPyhLWTC672vfE=; b=ISNuChhNFhF0mb/ERhhvHdjkmX0FBAPZBxB7MirGoiMLVThapPJenOKmxeZplO0g1N ToKtkU/ESnaRxYKCwmIh170S4zSaHdzla8VVncRDxlwImDQZ4+haRcaITQ+lIn8PMcFT RSlj5Nt1xw+5Ufktn8Gjn7VcGSpPFL5dehsPCQH5CTc+FlPH/zzCD4amv8KYIYn5di59 d/Cl8DwY2nNntahXmcHHjUPseWWxtIJdbCg8aOdsdocVa1GeM1PGkI+xqr8X/EwOGxkz Ya3oXwIMkDqO0f9NiOBuHDqqufT2Q2r33Vn6m2XlyRplgKPuX5nqAGwrd+MaLhIi9HOI zRCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788334358; x=1788939158; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=QDn9kL+O/DcgCowWQhzjL1E+vRjYGvPyhLWTC672vfE=; b=m2A2hd/wDS+Q1WKK2BYdz9GuLJ46tIb2xG5VhstvbMOdDNHx0Y7Z/HM1rdf0BS7eeh Ly/FL/aOEKt2I9Bx+ROY1O0bge+R35Hu4Il3YC/g3PERVbuHYuRopWC37UbjUHmeZRWz MXKzU8PpEt+ZpHAZMZJDXQEh1fGsc1PtDOhhl9CO45Nv3hs9ODoqNlDITL2KldShG1a0 OuPvE+/FUbua8wO9aDsIgYtfVmwN4hWq2+mbpn7hz1i/rCacyyAsLGMB5OkBHlkYzuka 05TEIyonJdYe+vQTbJh2JhstOYccXNr/e/tiDeGtvTKHbhJqrN6XxOUOLHVCf2mci4DM lViQ== X-Forwarded-Encrypted: i=1; AKwUvBxSwNOOSF6TBVXzj2y96j07v9DMUP4Q95+6f4m8Vlpf925MzXPGDa7MHP86gEw9GyJNfnlETE+x1v0=@lists.linux.dev X-Gm-Message-State: AFuF++mPjikeGZEwnXS/4Cc/FztTpIl8w0GZcDGnWkNj3wX4mPVV6GME KEMMkR+PUwrhkWOi5bWaW1AOBjJrNANlSwNzvkgHn0dDQaJAfljzy/Mn X-Gm-Gg: AYBFou0spe9ve4klcI+IvgMSX2osqviSIYiGwXbbk7Eta5bmt8cjSqHaPzHaTgD47Mc dmHT9SiyIh7WPkkiPHo+50n/1dlQeKNCuYcYRkGVwe8zcD+C+QKxJAjNYMbLXxVAj43Dtc0Npff 5HP2NsZx9YJgesL4L0HlsFxLGpZDUuwSkCU8X2Flv+EnZCRtzFGgPRPd4+sEx4fl5P0IaEdh+xd DzDvUQjOaRxgoRhIMgPKjjazqNz7ox1Gi3aJGdug7B4zyWVNzLlnI+GNxyBJ4ax+RwhnLOtVFdE dyPszgQpvHXZbZGvPU1yTNCUDObBOG1qUzRE9a2aDFRrBKhDFRBK/fV7YW9X7iO0p3rX6x23rzd t/H/evwtJCI9bjxSwiqFHGHXTON9oAbVuAk0ntXr02UFW+W6Jyjrc+dat+ovDqoDYIFMWZqUKsH Dw5nsD08BCu/Dv8z56eKGXZ7HZjkk8bqWbN0IWOiuvAaT3G1/yBB+uO7x31hJODe9YN89u2AnX X-Received: by 2002:a05:6a00:391c:b0:842:5b66:3c7f with SMTP id d2e1a72fcca58-85ed444854fmr4147616b3a.0.1788334358011; Wed, 02 Sep 2026 00:32:38 -0700 (PDT) Received: from intel.company.local ([122.11.210.25]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-85db2adcbedsm926914b3a.20.2026.09.02.00.32.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Sep 2026 00:32:36 -0700 (PDT) From: Wandun Chen To: catalin.marinas@arm.com, will@kernel.org, chenhuacai@kernel.org, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, robh@kernel.org, saravanak@kernel.org, akpm@linux-foundation.org, baoquan.he@linux.dev, rppt@kernel.org, pasha.tatashin@soleen.com, pratyush@kernel.org, m.szyprowski@samsung.com Cc: mark.rutland@arm.com, kernel@xen0n.name, alex@ghiti.fr, hpa@zytor.com, ruirui.yang@linux.dev, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, kexec@lists.infradead.org, linux-mm@kvack.org, iommu@lists.linux.dev Subject: [PATCH v6 05/10] crash_core: replace for_each_mem_range() with for_each_mem_region() Date: Wed, 2 Sep 2026 15:31:11 +0800 Message-ID: <20260902073116.802752-6-chenwandun1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260902073116.802752-1-chenwandun1@gmail.com> References: <20260902073116.802752-1-chenwandun1@gmail.com> Precedence: bulk X-Mailing-List: loongarch@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Wandun Chen for_each_mem_range() skips MEMBLOCK_NOMAP regions implicitly. Switch the weak defaults to for_each_mem_region(), which exposes struct memblock_region and per-region flags, and filter NOMAP regions explicitly via the new crash_should_skip_region() helper. This prepares for a subsequent patch to extend the skip filter. No functional change. Signed-off-by: Wandun Chen Tested-by: Meijing Zhao --- kernel/crash_core.c | 25 +++++++++++++++++-------- 1 file changed, 17 insertions(+), 8 deletions(-) diff --git a/kernel/crash_core.c b/kernel/crash_core.c index 3adee1ae120c..bd64cf585795 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -270,6 +270,12 @@ int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map, return 0; } +/* Exclude NOMAP regions from the vmcore. */ +static bool crash_should_skip_region(struct memblock_region *reg) +{ + return memblock_is_nomap(reg); +} + static struct crash_mem *alloc_cmem(unsigned int nr_ranges) { struct crash_mem *cmem; @@ -285,22 +291,25 @@ static struct crash_mem *alloc_cmem(unsigned int nr_ranges) unsigned int __weak arch_get_system_nr_ranges(void) { unsigned int nr_ranges = 2 + crashk_cma_cnt; /* crashk_res + crashk_low_res, +CMA splits */ - phys_addr_t start, end; - u64 i; + struct memblock_region *reg; - for_each_mem_range(i, &start, &end) + for_each_mem_region(reg) { + if (crash_should_skip_region(reg)) + continue; nr_ranges++; + } return nr_ranges; } int __weak arch_crash_populate_cmem(struct crash_mem *cmem) { - phys_addr_t start, end; - u64 i; + struct memblock_region *reg; - for_each_mem_range(i, &start, &end) { - cmem->ranges[cmem->nr_ranges].start = start; - cmem->ranges[cmem->nr_ranges].end = end - 1; + for_each_mem_region(reg) { + if (crash_should_skip_region(reg)) + continue; + cmem->ranges[cmem->nr_ranges].start = reg->base; + cmem->ranges[cmem->nr_ranges].end = reg->base + reg->size - 1; cmem->nr_ranges++; } return 0; -- 2.43.0