4 * wrapper around get_pfnblock_flags_mask and Ubuntu
5 * get_pageblock_flags_mask. Using KALLSYMS to get their address when
6 * available, else we need to have a kernel that exports this function
9 * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
11 * This library is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; only
14 * version 2.1 of the License.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with this library; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #include "../lttng-kernel-version.h"
28 #if defined(CONFIG_KALLSYMS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,2))
30 #include <linux/kallsyms.h>
31 #include <linux/mm_types.h>
32 #include <linux/module.h>
34 #include "page_alloc.h"
37 unsigned long (*get_pfnblock_flags_mask_sym
)(struct page
*page
,
39 unsigned long end_bitidx
,
42 unsigned long wrapper_get_pfnblock_flags_mask(struct page
*page
,
44 unsigned long end_bitidx
,
47 WARN_ON_ONCE(!get_pfnblock_flags_mask_sym
);
48 if (get_pfnblock_flags_mask_sym
) {
49 return get_pfnblock_flags_mask_sym(page
, pfn
, end_bitidx
, mask
);
54 EXPORT_SYMBOL_GPL(wrapper_get_pfnblock_flags_mask
);
56 int wrapper_get_pfnblock_flags_mask_init(void)
58 get_pfnblock_flags_mask_sym
=
59 (void *) kallsyms_lookup_funcptr("get_pfnblock_flags_mask");
60 if (!get_pfnblock_flags_mask_sym
)
67 #include <linux/pageblock-flags.h>
71 #if (defined(CONFIG_KALLSYMS) \
72 && LTTNG_UBUNTU_KERNEL_RANGE(3,13,11,50, 3,14,0,0))
74 #include <linux/kallsyms.h>
75 #include <linux/mm_types.h>
76 #include <linux/module.h>
78 #include "page_alloc.h"
81 unsigned long (*get_pageblock_flags_mask_sym
)(struct page
*page
,
82 unsigned long end_bitidx
,
85 unsigned long wrapper_get_pageblock_flags_mask(struct page
*page
,
86 unsigned long end_bitidx
,
89 WARN_ON_ONCE(!get_pageblock_flags_mask_sym
);
90 if (get_pageblock_flags_mask_sym
) {
91 return get_pageblock_flags_mask_sym(page
, end_bitidx
, mask
);
96 EXPORT_SYMBOL_GPL(wrapper_get_pageblock_flags_mask
);
98 int wrapper_get_pageblock_flags_mask_init(void)
100 get_pageblock_flags_mask_sym
=
101 (void *) kallsyms_lookup_funcptr("get_pageblock_flags_mask");
102 if (!get_pageblock_flags_mask_sym
)
109 #include <linux/pageblock-flags.h>