From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej2-f12.google.com (mail-ej2-f12.google.com [74.125.228.140]) (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 E6A573C5DBA for ; Sun, 27 Sep 2026 21:43:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.228.140 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790545433; cv=none; b=dibOvNLJY2IbqEcY+KWDziTQuL0f8zHmSq/qxgPsvVBOFPp6h8czDzhmAdEhpuE/ByG6X/z+2h2kRuWF8Abh6d/ZV7OQnAfWtqVCKow1qY3UW6jp6mJsEmnW9mzw188iSYvfw/LzXJWYeMs07qqxaF6jU6/yYD225By1tU1Su/k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790545433; c=relaxed/simple; bh=/dsZPKgs3LiEVy3t0FVgwAqo7s2V/HbIC3nNFSOG314=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Poiqk5ZdDGTNv/AXJsBiKPYw8ntR7VDyghYJHElCRXYDNNCAOEkHsDBJibXdDd9yW11U9Eyt4wNGR9O8IfHwU6Kicp3oxGLyeelY8psgJJ0MIX6nM59lxssbMDPoRJfTHQ5kBppbprKJ0lxxZHg65ujD4Pyx8mfoVhf4/vRSrx0= 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=FnGJ07dH; arc=none smtp.client-ip=74.125.228.140 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="FnGJ07dH" Received: by mail-ej2-f12.google.com with SMTP id a640c23a62f3a-c293c683202so341431366b.3 for ; Sun, 27 Sep 2026 14:43:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1790545429; x=1791150229; 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=FnGJ07dHLWVCYz2tz2pJVe6fVowlwpQxQZ3dB7bSC8s/2oLOrcA/Xclk4YvyfPvCCM Ih6bW43R0cvWJNhSTYUbhyPiyZnHwjKXT+drrzJ6DYWinxeZ+ND7ZBwZ496e37jAXYO+ PsLlfLbXue8ai3SwJFWb+aQFsDX6rwIFUdP0UMkWGSCeT6Y3vDPScrvUhJexLgwXfvxx 13ekHq6uBzlELLoRJ9fwuYJJm95gg4ErEyAFqUiV4xixAaQa/kIhCXYpgOHYmq9q1yx0 kdiBBkxODJUVtzQzouayfLgy5U0NwnfEa1Y33KILBu5dMipSTRFGR5EbL92sxZaBeh0a AiIg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790545429; x=1791150229; 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=sfkU7bWyjNgpnRrXfH02wmelc0cf6+BowB8zAnHe/4xspPnuS9MS4tbexa2kqeHjCd l1Q2MIY2NpDf6MgGeFc2PpxPwxqnBLChf2pQF98uKdq96YAbxSf9XWuQJA+XhDRis7iT YG+tOMKAX01kY2Z3dGfGmnsE/80SQRo5wTQnp+oYssr7D95PbbgJRQYfEnvyIuH2PXtI 4Xzrnn4UbO3VxX7StfAYe+6Q7mpyg3pJwEG/1sGgvnX+4Eq2sk3lj73NwTj+BPPQnGdN vfC29TMigKLEMNT+PxhDPmca68oXDl55H75Y+lYjQ1e+R+luyKUhH5gfDwSN+zIPFRB7 fRNw== X-Forwarded-Encrypted: i=1; AKwUvBwhpx62HRsqi24zGo0nf6dYyeXcyZ1+LXBzCnUuItSVVfI6+RaZkRsYq5gHAjJ+jIlAajnrGNBcR40ZVVE=@vger.kernel.org X-Gm-Message-State: AFuF++n8qjuh87oy0sszViffj17bvZbihocN8wL6b2K2+THc926avP7e LepWA44wuooFyO6LH/YplUmy4x87gnEmBOkCCTXVJKKBI0ORByRLxj+Z X-Gm-Gg: AYBFou1nAtoxefuKCjLqMMw4OMbYir6mWAPD/lfU685fT6q4unugZAsGarmss1zM7zY 1ZCjD5O2/TAisZ07x3HIem73Xmz4n35+/0Fkua+dE8PqBlTVQlu7cB6HdywosCI+69acqWilO0F smixl6FAP2atyU2fJsvBw54yK/Te+0jPUBZ/LPm5ZmfnrMXI5JKt2njEmFne4P6jYP8hlkmKx2z awQYit63w6XxWLDAQH5Gyqu4U7mlu52gHgF8rxqa58dTv2FDbkAMnB8nQOKg8Yn8CsKG0xyQ+pf H8El9RIHNJJsDWGVRpPOsf44bScqkDW+o7fwy5Sz2XQqlu4LIZy50m9R8vvx0ftV4e8k9ryaAJA A2pEsjuZLCSJcFLOnBsp9GgRZ5oNFH6rsGxZThnIRCQXD3YLtAxjXYnoSOVRoVRjrsqR83ISrgK s9sKKJ8dBSV7RkuwJ/WBZXUwVFq/5GxzYuFSBXIj/UOw3P+81nncnweY06mvR1YobiEm1boyiYT P2ZEtk1ZZ+3R9seJc/SKRh9UD3gUTSrLzcnAvmsZw== X-Received: by 2002:a17:907:1b03:b0:c1c:4a80:30c4 with SMTP id a640c23a62f3a-c2ae97cb3b9mr671379566b.11.1790545429116; Sun, 27 Sep 2026 14:43:49 -0700 (PDT) Received: from buildhost.darklands.se ([2001:9b1:ff:d701:51eb:176f:63d9:53f8]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c2ae757b9c1sm376091866b.33.2026.09.27.14.43.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Sep 2026 14:43:48 -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 v4 4/6] sparc32: drop unused valid address bitmap Date: Sun, 27 Sep 2026 23:43:15 +0200 Message-ID: <20260927214334.886582-5-linmag7@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260927214334.886582-1-linmag7@gmail.com> References: <20260927214334.886582-1-linmag7@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@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