From patchwork Thu Dec 2 12:00:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1562657 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4J4ZMc6y1Dz9sRK for ; Thu, 2 Dec 2021 23:02:36 +1100 (AEDT) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4J4ZMc4gzJz3dkp for ; Thu, 2 Dec 2021 23:02:36 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=csgroup.eu (client-ip=93.17.235.10; helo=pegase2.c-s.fr; envelope-from=christophe.leroy@csgroup.eu; receiver=) Received: from pegase2.c-s.fr (pegase2.c-s.fr [93.17.235.10]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4J4ZKn63pYz2ywV for ; Thu, 2 Dec 2021 23:01:01 +1100 (AEDT) Received: from localhost (mailhub3.si.c-s.fr [172.26.127.67]) by localhost (Postfix) with ESMTP id 4J4ZKQ6NJzz9sSf; Thu, 2 Dec 2021 13:00:42 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from pegase2.c-s.fr ([172.26.127.65]) by localhost (pegase2.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id w2r8O-DqWHCF; Thu, 2 Dec 2021 13:00:42 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase2.c-s.fr (Postfix) with ESMTP id 4J4ZKL6qvRz9sSm; Thu, 2 Dec 2021 13:00:38 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id E19B28B7C8; Thu, 2 Dec 2021 13:00:38 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id SXqztKQCMB8f; Thu, 2 Dec 2021 13:00:38 +0100 (CET) Received: from PO20335.IDSI0.si.c-s.fr (unknown [192.168.232.163]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 488098B7C6; Thu, 2 Dec 2021 13:00:38 +0100 (CET) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 1B2C0Vts177245 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Thu, 2 Dec 2021 13:00:31 +0100 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 1B2C0Vow177244; Thu, 2 Dec 2021 13:00:31 +0100 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman Subject: [PATCH v1 02/11] powerpc/code-patching: Remove init_mem_is_free Date: Thu, 2 Dec 2021 13:00:18 +0100 Message-Id: X-Mailer: git-send-email 2.33.1 In-Reply-To: <3ff9823c0a812a8a145d979a9600a6d4591b80ee.1638446239.git.christophe.leroy@csgroup.eu> References: <3ff9823c0a812a8a145d979a9600a6d4591b80ee.1638446239.git.christophe.leroy@csgroup.eu> MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1638446424; l=2406; s=20211009; h=from:subject:message-id; bh=HLfje8baahqPsWu1CyLIFxbGVxaxwwGQflvuvP9n5k0=; b=Q3oBY9AzuU/3NoKIkeE7JjkogePg8sQU62lFSShHvGxB9eoaE+op9O5a+LF0hQWPN7t6QihHSg+r re/iKRPUBQTBIkBSIf66K8PzDmcVGpM7/86Jsno6FXhww50jZp8j X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" A new state has been added by commit d2635f2012a4 ("mm: create a new system state and fix core_kernel_text()"). That state tells when initmem is about to be released and is redundant with init_mem_is_free. Remove init_mem_is_free. Signed-off-by: Christophe Leroy --- arch/powerpc/include/asm/setup.h | 1 - arch/powerpc/lib/code-patching.c | 3 +-- arch/powerpc/mm/mem.c | 2 -- 3 files changed, 1 insertion(+), 5 deletions(-) diff --git a/arch/powerpc/include/asm/setup.h b/arch/powerpc/include/asm/setup.h index 6c1a7d217d1a..426a2d8d028f 100644 --- a/arch/powerpc/include/asm/setup.h +++ b/arch/powerpc/include/asm/setup.h @@ -9,7 +9,6 @@ extern void ppc_printk_progress(char *s, unsigned short hex); extern unsigned int rtas_data; extern unsigned long long memory_limit; -extern bool init_mem_is_free; extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask); struct device_node; diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c index 4fe4464b7a84..7bb8dd2dc19e 100644 --- a/arch/powerpc/lib/code-patching.c +++ b/arch/powerpc/lib/code-patching.c @@ -15,7 +15,6 @@ #include #include #include -#include #include static int __patch_instruction(u32 *exec_addr, ppc_inst_t instr, u32 *patch_addr) @@ -187,7 +186,7 @@ static int do_patch_instruction(u32 *addr, ppc_inst_t instr) int patch_instruction(u32 *addr, ppc_inst_t instr) { /* Make sure we aren't patching a freed init section */ - if (init_mem_is_free && init_section_contains(addr, 4)) + if (system_state >= SYSTEM_FREEING_INITMEM && init_section_contains(addr, 4)) return 0; return do_patch_instruction(addr, instr); diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index bd5d91a31183..8e301cd8925b 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -26,7 +26,6 @@ #include unsigned long long memory_limit; -bool init_mem_is_free; unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] __page_aligned_bss; EXPORT_SYMBOL(empty_zero_page); @@ -312,7 +311,6 @@ void free_initmem(void) { ppc_md.progress = ppc_printk_progress; mark_initmem_nx(); - init_mem_is_free = true; free_initmem_default(POISON_FREE_INITMEM); }