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) \
29 && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,2) \
30 || LTTNG_DEBIAN_KERNEL_RANGE(3,16,7,9,0,0, 3,17,0,0,0,0)))
32 #include <linux/kallsyms.h>
33 #include <linux/mm_types.h>
34 #include <linux/module.h>
36 #include "page_alloc.h"
39 unsigned long (*get_pfnblock_flags_mask_sym
)(struct page
*page
,
41 unsigned long end_bitidx
,
44 unsigned long wrapper_get_pfnblock_flags_mask(struct page
*page
,
46 unsigned long end_bitidx
,
49 WARN_ON_ONCE(!get_pfnblock_flags_mask_sym
);
50 if (get_pfnblock_flags_mask_sym
) {
51 return get_pfnblock_flags_mask_sym(page
, pfn
, end_bitidx
, mask
);
56 EXPORT_SYMBOL_GPL(wrapper_get_pfnblock_flags_mask
);
58 int wrapper_get_pfnblock_flags_mask_init(void)
60 get_pfnblock_flags_mask_sym
=
61 (void *) kallsyms_lookup_funcptr("get_pfnblock_flags_mask");
62 if (!get_pfnblock_flags_mask_sym
)
69 #include <linux/pageblock-flags.h>
73 #if (defined(CONFIG_KALLSYMS) \
74 && LTTNG_UBUNTU_KERNEL_RANGE(3,13,11,50, 3,14,0,0))
76 #include <linux/kallsyms.h>
77 #include <linux/mm_types.h>
78 #include <linux/module.h>
80 #include "page_alloc.h"
83 unsigned long (*get_pageblock_flags_mask_sym
)(struct page
*page
,
84 unsigned long end_bitidx
,
87 unsigned long wrapper_get_pageblock_flags_mask(struct page
*page
,
88 unsigned long end_bitidx
,
91 WARN_ON_ONCE(!get_pageblock_flags_mask_sym
);
92 if (get_pageblock_flags_mask_sym
) {
93 return get_pageblock_flags_mask_sym(page
, end_bitidx
, mask
);
98 EXPORT_SYMBOL_GPL(wrapper_get_pageblock_flags_mask
);
100 int wrapper_get_pageblock_flags_mask_init(void)
102 get_pageblock_flags_mask_sym
=
103 (void *) kallsyms_lookup_funcptr("get_pageblock_flags_mask");
104 if (!get_pageblock_flags_mask_sym
)
111 #include <linux/pageblock-flags.h>