From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ed1-f43.google.com (mail-ed1-f43.google.com [209.85.208.43]) (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 5AE573F107E for ; Wed, 7 Oct 2026 17:41:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.43 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791394911; cv=none; b=G+yNpQYKTqtKHYi1RB+u3XtAgDFno/nAK2ZdPsblfJBCwz/tenIURKIcjRW3F6nKI4L7RbzXTkXT2d3MBBOCvxLTWPQ+Vl3j8L1V/GXwd+O/lN3bo0VpW1UH+ev8E30ixpP3AJrcFD9c61mYxy4PcVoQkY9FzdqFINKqOdOAumw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791394911; c=relaxed/simple; bh=/dsZPKgs3LiEVy3t0FVgwAqo7s2V/HbIC3nNFSOG314=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iVjdu+HE2ik+1KrcjHP4MuvAWBecebusxnEnI/7GVAZHaeQ+nit8qWaphgT3gijMsQB1l/QefG+xFJP0f4d4Q6/q6mOQFlPKTcP6HKqbAjI7fTWRB1UmTPQO2PI5hVfZaN3gX74xdBsdPDKasEJEs0N4kedY/32Krkh4OOieS3A= 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=M+QnFvTf; arc=none smtp.client-ip=209.85.208.43 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="M+QnFvTf" Received: by mail-ed1-f43.google.com with SMTP id 4fb4d7f45d1cf-6a601ba6870so7398311a12.0 for ; Wed, 07 Oct 2026 10:41:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1791394906; x=1791999706; darn=vger.kernel.org; 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=eMyYSrhfIYHYqjp8mHUnXor+qxDuOXc+/5yPGSD7oKw=; b=M+QnFvTf6GT2IMpxUj2uG0YBnpBTbpdmqfQ6Svld8LmGA1pQalZiloNvUxRpeNfm5Z Q2TPC3k4XRNwkxTJCQtxTUStzfqINPaNSKmTWMmwmQpUXG2+i0tz4QZ++IjEiru1xA+V yGqNBcG0gZlEbQfaEoMVHX5/sFO0X532GC0l7tpruexiimpNuLk0KM6f2eqXFg9RtO7v kJzEmcGSAGWeYKWSbHWzEfTUsfjs2YHnYDXgTvFmrjmWXoNKgsJvQmnxnuJ414FUdUUs J0j3TUv+Q5hQzva5xpQj2fftrVFKwsGcEqbsmUwU+FhdGsNNGFn70wX4JLcRKfw7w3Uv UDpw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1791394906; x=1791999706; 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=eMyYSrhfIYHYqjp8mHUnXor+qxDuOXc+/5yPGSD7oKw=; b=tBXRvUjjcwEI90iPnhKOH/AP0SSvRxqlzHx7s1RmOUVKFxk6MzDwNiSS/CNW/b2TQa Lo7oqsUTOe9R0stwZ4YwAggZY6G1qvdipNwvxPT4hWeMwA9jNpHhp+i+DYAGqA2HsfSr VbhsEyaNMJUQik43x8z+6r1Ql7QJbhyUf4nIUh9aaCXtSiYjFlYqKsO6UQ1wYUlgTw49 NkMyt+L9C5WFyz/pxy5V0hOwh27IzGbE3Z5jCOe3C2S1lqOXBbk7pAvKy1xv0OFzU/OH PsNFNMJON6gng2klDdZ5NWyHhtYr7uPsMdzp98VVHhUvTLy/dZuhxBSPk0P9JF7+xGKR ZTww== X-Forwarded-Encrypted: i=1; AKwUvBwfR4ERszhr0ykrFYEwXKONrahYVTPQ+KH1XxdsA5P9OZJ/QfwnP30jO7ikAfElh9FJiz0noIar/xJ6@vger.kernel.org X-Gm-Message-State: AFq9FYIfF2+cz30RYnwKVXU1TPWWaSr5Ai3tnQg3qTXzwsKy7UMcZqxd 6PeKvhNx2o5j8hVj86fikZT3tQuVzpkBbKe+mjYJWY69lwqSq6JA9sr3 X-Gm-Gg: AYBFou2gRifYMWK924Rddn2Vd34PODA4cbnwNxdDR/olljdtbJY+gxA7BSUtLDzTQAx AMKNXl3aKWLbRBAe10g90o3z/ye/9Z62xsiaTl+067n4Kvh45mTB/idAZy2HldWYYRZmbsCPKQP Qw2jdGMRIlJSwvMH7ndJMDXrYDGVyRab1HmFxvs8qVwckK4CP6XOek7dPBvwu990i+b6Qu0+9lS Sgwfo65/8HvZ0DbWlM1jUGgYKZSbuAmPKQUkodatAChtLlARPgixqWRUAO4F3DnDokqpVpGDK9w R59RkfW/FnnHSmnIotKyQGZC9a+qK8fbCl+9QDh6D9oGyskuFhE22Yn96lGkdfdjfGFI8AwZt0j Tw42TTyJ0MwD22jHQiHPUKJwzBehlgOhkKJnT3sosN6+Umv/CGc92i8KfPTlKwmK7Fmy4RVpUJF vv0+WR8e6vHhFa7eGi9jSkviKe8N9nPMRWO3/E6le3ZCz2eaYZZI0hbS9WTErYYp2hwT5+hfW9J FCt6bOd5Z+0KmR7Z6ejLfoNfo0MdzLmfwAyJK7j X-Received: by 2002:a05:6402:52d6:b0:6aa:f129:b193 with SMTP id 4fb4d7f45d1cf-6aff458de1emr2912087a12.22.1791394906156; Wed, 07 Oct 2026 10:41:46 -0700 (PDT) Received: from buildhost.darklands.se ([2001:9b1:ff:d701:51eb:176f:63d9:53f8]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6b009e80cd8sm356802a12.8.2026.10.07.10.41.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Oct 2026 10:41:45 -0700 (PDT) From: Magnus Lindholm To: davem@davemloft.net, andreas@gaisler.com Cc: sam@ravnborg.org, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, linmag7@gmail.com Subject: [PATCH v5 4/6] sparc32: drop unused valid address bitmap Date: Wed, 7 Oct 2026 19:41:13 +0200 Message-ID: <20261007174128.959307-5-linmag7@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261007174128.959307-1-linmag7@gmail.com> References: <20261007174128.959307-1-linmag7@gmail.com> Precedence: bulk X-Mailing-List: sparclinux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit sparc_valid_addr_bitmap is populated during early memory setup but never read. Remove the bitmap, its allocation and the population helper. Suggested-by: Sam Ravnborg Reviewed-by: Sam Ravnborg Signed-off-by: Magnus Lindholm --- arch/sparc/mm/init_32.c | 36 ------------------------------------ 1 file changed, 36 deletions(-) diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c index 75050dfbc2ea..6880d9cb30a5 100644 --- a/arch/sparc/mm/init_32.c +++ b/arch/sparc/mm/init_32.c @@ -13,7 +13,6 @@ #include #include #include -#include #include #include #include @@ -24,7 +23,6 @@ #include #include #include -#include #include #include @@ -37,8 +35,6 @@ #include "mm_32.h" -static unsigned long *sparc_valid_addr_bitmap; - unsigned long phys_base; EXPORT_SYMBOL(phys_base); @@ -218,27 +214,8 @@ void __init paging_init(void) device_scan(); } -static void __init taint_real_pages(void) -{ - int i; - - for (i = 0; sp_banks[i].num_bytes; i++) { - unsigned long start, end; - - start = sp_banks[i].base_addr; - end = start + sp_banks[i].num_bytes; - - while (start < end) { - set_bit(start >> 20, sparc_valid_addr_bitmap); - start += PAGE_SIZE; - } - } -} - void __init arch_mm_preinit(void) { - int i; - if (PKMAP_BASE+LAST_PKMAP*PAGE_SIZE >= FIXADDR_START) { prom_printf("BUG: fixmap and pkmap areas overlap\n"); prom_printf("pkbase: 0x%lx pkend: 0x%lx fixstart 0x%lx\n", @@ -248,19 +225,6 @@ void __init arch_mm_preinit(void) prom_printf("Please mail sparclinux@vger.kernel.org.\n"); prom_halt(); } - - i = last_valid_pfn >> ((20 - PAGE_SHIFT) + 5); - i += 1; - sparc_valid_addr_bitmap = (unsigned long *) - memblock_alloc(i << 2, SMP_CACHE_BYTES); - - if (sparc_valid_addr_bitmap == NULL) { - prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n"); - prom_halt(); - } - memset(sparc_valid_addr_bitmap, 0, i << 2); - - taint_real_pages(); } void sparc_flush_page_to_ram(struct page *page) -- 2.43.0