From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751769AbeEBN5C (ORCPT ); Wed, 2 May 2018 09:57:02 -0400 Received: from mga01.intel.com ([192.55.52.88]:58147 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751271AbeEBNzc (ORCPT ); Wed, 2 May 2018 09:55:32 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,354,1520924400"; d="scan'208";a="225150729" From: changbin.du@intel.com To: yamada.masahiro@socionext.com, michal.lkml@markovi.net, tglx@linutronix.de, mingo@redhat.com, akpm@linux-foundation.org Cc: rostedt@goodmis.org, rdunlap@infradead.org, x86@kernel.org, lgirdwood@gmail.com, broonie@kernel.org, arnd@arndb.de, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Changbin Du Subject: [PATCH v2 1/5] x86/mm: surround level4_kernel_pgt with #ifdef CONFIG_X86_5LEVEL...#endif Date: Wed, 2 May 2018 21:44:56 +0800 Message-Id: <1525268700-10631-2-git-send-email-changbin.du@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1525268700-10631-1-git-send-email-changbin.du@intel.com> References: <1525268700-10631-1-git-send-email-changbin.du@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Changbin Du The level4_kernel_pgt is only defined when X86_5LEVEL is enabled. So surround level4_kernel_pgt with #ifdef CONFIG_X86_5LEVEL...#endif to make code correct. Signed-off-by: Changbin Du --- arch/x86/include/asm/pgtable_64.h | 2 ++ arch/x86/kernel/head64.c | 13 ++++++------- 2 files changed, 8 insertions(+), 7 deletions(-) diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h index 877bc27..9e7f667 100644 --- a/arch/x86/include/asm/pgtable_64.h +++ b/arch/x86/include/asm/pgtable_64.h @@ -15,7 +15,9 @@ #include #include +#ifdef CONFIG_X86_5LEVEL extern p4d_t level4_kernel_pgt[512]; +#endif extern p4d_t level4_ident_pgt[512]; extern pud_t level3_kernel_pgt[512]; extern pud_t level3_ident_pgt[512]; diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index 0c408f8..775d7a6 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -143,16 +143,15 @@ unsigned long __head __startup_64(unsigned long physaddr, pgd = fixup_pointer(&early_top_pgt, physaddr); p = pgd + pgd_index(__START_KERNEL_map); - if (la57) - *p = (unsigned long)level4_kernel_pgt; - else - *p = (unsigned long)level3_kernel_pgt; - *p += _PAGE_TABLE_NOENC - __START_KERNEL_map + load_delta; - +#ifdef CONFIG_X86_5LEVEL if (la57) { + *p = (unsigned long)level4_kernel_pgt; p4d = fixup_pointer(&level4_kernel_pgt, physaddr); p4d[511] += load_delta; - } + } else +#endif + *p = (unsigned long)level3_kernel_pgt; + *p += _PAGE_TABLE_NOENC - __START_KERNEL_map + load_delta; pud = fixup_pointer(&level3_kernel_pgt, physaddr); pud[510] += load_delta; -- 2.7.4