+++ /dev/null
-/*
- * wrapper/page_alloc.c
- *
- * wrapper around get_pfnblock_flags_mask and Ubuntu
- * get_pageblock_flags_mask. Using KALLSYMS to get their address when
- * available, else we need to have a kernel that exports this function
- * to GPL modules.
- *
- * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "../lttng-kernel-version.h"
-
-#if (defined(CONFIG_KALLSYMS) \
- && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,2) \
- || LTTNG_KERNEL_RANGE(3,14,36, 3,15,0) \
- || LTTNG_KERNEL_RANGE(3,18,10, 3,19,0) \
- || LTTNG_DEBIAN_KERNEL_RANGE(3,16,7,9,0,0, 3,17,0,0,0,0) \
- || LTTNG_UBUNTU_KERNEL_RANGE(3,16,7,34, 3,17,0,0)))
-
-#include <linux/kallsyms.h>
-#include <linux/mm_types.h>
-#include <linux/module.h>
-#include "kallsyms.h"
-#include "page_alloc.h"
-
-static
-unsigned long (*get_pfnblock_flags_mask_sym)(struct page *page,
- unsigned long pfn,
- unsigned long end_bitidx,
- unsigned long mask);
-
-unsigned long wrapper_get_pfnblock_flags_mask(struct page *page,
- unsigned long pfn,
- unsigned long end_bitidx,
- unsigned long mask)
-{
- WARN_ON_ONCE(!get_pfnblock_flags_mask_sym);
- if (get_pfnblock_flags_mask_sym) {
- return get_pfnblock_flags_mask_sym(page, pfn, end_bitidx, mask);
- } else {
- return -ENOSYS;
- }
-}
-EXPORT_SYMBOL_GPL(wrapper_get_pfnblock_flags_mask);
-
-int wrapper_get_pfnblock_flags_mask_init(void)
-{
- get_pfnblock_flags_mask_sym =
- (void *) kallsyms_lookup_funcptr("get_pfnblock_flags_mask");
- if (!get_pfnblock_flags_mask_sym)
- return -1;
- return 0;
-}
-
-#else
-
-#include <linux/pageblock-flags.h>
-
-#endif
-
-#if (defined(CONFIG_KALLSYMS) \
- && LTTNG_UBUNTU_KERNEL_RANGE(3,13,11,50, 3,14,0,0))
-
-#include <linux/kallsyms.h>
-#include <linux/mm_types.h>
-#include <linux/module.h>
-#include "kallsyms.h"
-#include "page_alloc.h"
-
-static
-unsigned long (*get_pageblock_flags_mask_sym)(struct page *page,
- unsigned long end_bitidx,
- unsigned long mask);
-
-unsigned long wrapper_get_pageblock_flags_mask(struct page *page,
- unsigned long end_bitidx,
- unsigned long mask)
-{
- WARN_ON_ONCE(!get_pageblock_flags_mask_sym);
- if (get_pageblock_flags_mask_sym) {
- return get_pageblock_flags_mask_sym(page, end_bitidx, mask);
- } else {
- return -ENOSYS;
- }
-}
-EXPORT_SYMBOL_GPL(wrapper_get_pageblock_flags_mask);
-
-int wrapper_get_pageblock_flags_mask_init(void)
-{
- get_pageblock_flags_mask_sym =
- (void *) kallsyms_lookup_funcptr("get_pageblock_flags_mask");
- if (!get_pageblock_flags_mask_sym)
- return -1;
- return 0;
-}
-
-#else
-
-#include <linux/pageblock-flags.h>
-
-#endif