From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/arm64/mm/pgd.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 kernel/arch/arm64/mm/pgd.c (limited to 'kernel/arch/arm64/mm/pgd.c') diff --git a/kernel/arch/arm64/mm/pgd.c b/kernel/arch/arm64/mm/pgd.c new file mode 100644 index 000000000..71ca104f9 --- /dev/null +++ b/kernel/arch/arm64/mm/pgd.c @@ -0,0 +1,61 @@ +/* + * PGD allocation/freeing + * + * Copyright (C) 2012 ARM Ltd. + * Author: Catalin Marinas + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include + +#include +#include +#include + +#include "mm.h" + +#define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t)) + +static struct kmem_cache *pgd_cache; + +pgd_t *pgd_alloc(struct mm_struct *mm) +{ + if (PGD_SIZE == PAGE_SIZE) + return (pgd_t *)__get_free_page(PGALLOC_GFP); + else + return kmem_cache_alloc(pgd_cache, PGALLOC_GFP); +} + +void pgd_free(struct mm_struct *mm, pgd_t *pgd) +{ + if (PGD_SIZE == PAGE_SIZE) + free_page((unsigned long)pgd); + else + kmem_cache_free(pgd_cache, pgd); +} + +static int __init pgd_cache_init(void) +{ + /* + * Naturally aligned pgds required by the architecture. + */ + if (PGD_SIZE != PAGE_SIZE) + pgd_cache = kmem_cache_create("pgd_cache", PGD_SIZE, PGD_SIZE, + SLAB_PANIC, NULL); + return 0; +} +core_initcall(pgd_cache_init); -- cgit 1.2.3-korg