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/include/linux/pageblock-flags.h | 101 +++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) create mode 100644 kernel/include/linux/pageblock-flags.h (limited to 'kernel/include/linux/pageblock-flags.h') diff --git a/kernel/include/linux/pageblock-flags.h b/kernel/include/linux/pageblock-flags.h new file mode 100644 index 000000000..2baeee12f --- /dev/null +++ b/kernel/include/linux/pageblock-flags.h @@ -0,0 +1,101 @@ +/* + * Macros for manipulating and testing flags related to a + * pageblock_nr_pages number of pages. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation version 2 of the License + * + * 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (C) IBM Corporation, 2006 + * + * Original author, Mel Gorman + * Major cleanups and reduction of bit operations, Andy Whitcroft + */ +#ifndef PAGEBLOCK_FLAGS_H +#define PAGEBLOCK_FLAGS_H + +#include + +/* Bit indices that affect a whole block of pages */ +enum pageblock_bits { + PB_migrate, + PB_migrate_end = PB_migrate + 3 - 1, + /* 3 bits required for migrate types */ + PB_migrate_skip,/* If set the block is skipped by compaction */ + + /* + * Assume the bits will always align on a word. If this assumption + * changes then get/set pageblock needs updating. + */ + NR_PAGEBLOCK_BITS +}; + +#ifdef CONFIG_HUGETLB_PAGE + +#ifdef CONFIG_HUGETLB_PAGE_SIZE_VARIABLE + +/* Huge page sizes are variable */ +extern int pageblock_order; + +#else /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */ + +/* Huge pages are a constant size */ +#define pageblock_order HUGETLB_PAGE_ORDER + +#endif /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */ + +#else /* CONFIG_HUGETLB_PAGE */ + +/* If huge pages are not used, group by MAX_ORDER_NR_PAGES */ +#define pageblock_order (MAX_ORDER-1) + +#endif /* CONFIG_HUGETLB_PAGE */ + +#define pageblock_nr_pages (1UL << pageblock_order) + +/* Forward declaration */ +struct page; + +unsigned long get_pfnblock_flags_mask(struct page *page, + unsigned long pfn, + unsigned long end_bitidx, + unsigned long mask); + +void set_pfnblock_flags_mask(struct page *page, + unsigned long flags, + unsigned long pfn, + unsigned long end_bitidx, + unsigned long mask); + +/* Declarations for getting and setting flags. See mm/page_alloc.c */ +#define get_pageblock_flags_group(page, start_bitidx, end_bitidx) \ + get_pfnblock_flags_mask(page, page_to_pfn(page), \ + end_bitidx, \ + (1 << (end_bitidx - start_bitidx + 1)) - 1) +#define set_pageblock_flags_group(page, flags, start_bitidx, end_bitidx) \ + set_pfnblock_flags_mask(page, flags, page_to_pfn(page), \ + end_bitidx, \ + (1 << (end_bitidx - start_bitidx + 1)) - 1) + +#ifdef CONFIG_COMPACTION +#define get_pageblock_skip(page) \ + get_pageblock_flags_group(page, PB_migrate_skip, \ + PB_migrate_skip) +#define clear_pageblock_skip(page) \ + set_pageblock_flags_group(page, 0, PB_migrate_skip, \ + PB_migrate_skip) +#define set_pageblock_skip(page) \ + set_pageblock_flags_group(page, 1, PB_migrate_skip, \ + PB_migrate_skip) +#endif /* CONFIG_COMPACTION */ + +#endif /* PAGEBLOCK_FLAGS_H */ -- cgit 1.2.3-korg