From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758964AbbAaAgd (ORCPT ); Fri, 30 Jan 2015 19:36:33 -0500 Received: from mga02.intel.com ([134.134.136.20]:1915 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752160AbbAaAgc (ORCPT ); Fri, 30 Jan 2015 19:36:32 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,495,1418112000"; d="scan'208";a="659474930" From: "Kirill A. Shutemov" To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Guenter Roeck , "Kirill A. Shutemov" Subject: [PATCH] mm: do not use mm->nr_pmds on !MMU configurations Date: Sat, 31 Jan 2015 02:36:16 +0200 Message-Id: <1422664576-220960-1-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1422629008-13689-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1422629008-13689-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org mm->nr_pmds doesn't make sense on !MMU configurations Signed-off-by: Kirill A. Shutemov --- This patch should probably go before the series. --- include/linux/mm.h | 9 ++++++++- kernel/fork.c | 4 +--- 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index d782617c11de..a09837f3f4b7 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1454,13 +1454,15 @@ static inline int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address); #endif -#ifdef __PAGETABLE_PMD_FOLDED +#if defined(__PAGETABLE_PMD_FOLDED) || !defined(CONFIG_MMU) static inline int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address) { return 0; } +static inline void mm_nr_pmds_init(struct mm_struct *mm) {} + static inline unsigned long mm_nr_pmds(struct mm_struct *mm) { return 0; @@ -1472,6 +1474,11 @@ static inline void mm_dec_nr_pmds(struct mm_struct *mm) {} #else int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address); +static inline void mm_nr_pmds_init(struct mm_struct *mm) +{ + atomic_long_set(&mm->nr_pmds, 0); +} + static inline unsigned long mm_nr_pmds(struct mm_struct *mm) { return atomic_long_read(&mm->nr_pmds); diff --git a/kernel/fork.c b/kernel/fork.c index 76d6f292274c..56b82deb6457 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -555,9 +555,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p) INIT_LIST_HEAD(&mm->mmlist); mm->core_state = NULL; atomic_long_set(&mm->nr_ptes, 0); -#ifndef __PAGETABLE_PMD_FOLDED - atomic_long_set(&mm->nr_pmds, 0); -#endif + mm_nr_pmds_init(mm); mm->map_count = 0; mm->locked_vm = 0; mm->pinned_vm = 0; -- 2.1.4