1 /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
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>
12 #include <lttng-kernel-version.h>
14 #if (defined(CONFIG_KALLSYMS) \
15 && (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,19,2) \
16 || LTTNG_KERNEL_RANGE(3,14,36, 3,15,0) \
17 || LTTNG_KERNEL_RANGE(3,18,10, 3,19,0) \
18 || LTTNG_DEBIAN_KERNEL_RANGE(3,16,7,9,0,0, 3,17,0,0,0,0) \
19 || LTTNG_UBUNTU_KERNEL_RANGE(3,16,7,34, 3,17,0,0)))
21 /* Include page_alloc wrapper before pageblock-flags.h. */
22 #include <wrapper/page_alloc.h>
24 #include <linux/pageblock-flags.h>
25 #include <linux/kallsyms.h>
26 #include <linux/mm_types.h>
27 #include <linux/module.h>
28 #include <wrapper/kallsyms.h>
29 #include <lttng-kernel-version.h>
31 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,14,0))
33 unsigned long (*get_pfnblock_flags_mask_sym
)(const struct page
*page
,
37 unsigned long wrapper_get_pfnblock_flags_mask(const struct page
*page
,
41 WARN_ON_ONCE(!get_pfnblock_flags_mask_sym
);
42 if (get_pfnblock_flags_mask_sym
) {
43 return get_pfnblock_flags_mask_sym(page
, pfn
, mask
);
48 #elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,9,0))
50 unsigned long (*get_pfnblock_flags_mask_sym
)(struct page
*page
,
54 unsigned long wrapper_get_pfnblock_flags_mask(struct page
*page
,
58 WARN_ON_ONCE(!get_pfnblock_flags_mask_sym
);
59 if (get_pfnblock_flags_mask_sym
) {
60 return get_pfnblock_flags_mask_sym(page
, pfn
, mask
);
65 #else /* #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,9,0)) */
67 unsigned long (*get_pfnblock_flags_mask_sym
)(struct page
*page
,
69 unsigned long end_bitidx
,
72 unsigned long wrapper_get_pfnblock_flags_mask(struct page
*page
,
74 unsigned long end_bitidx
,
77 WARN_ON_ONCE(!get_pfnblock_flags_mask_sym
);
78 if (get_pfnblock_flags_mask_sym
) {
79 return get_pfnblock_flags_mask_sym(page
, pfn
, end_bitidx
, mask
);
84 #endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,9,0)) */
86 EXPORT_SYMBOL_GPL(wrapper_get_pfnblock_flags_mask
);
88 int wrapper_get_pfnblock_flags_mask_init(void)
90 get_pfnblock_flags_mask_sym
=
91 (void *) kallsyms_lookup_funcptr("get_pfnblock_flags_mask");
92 if (!get_pfnblock_flags_mask_sym
)
96 EXPORT_SYMBOL_GPL(wrapper_get_pfnblock_flags_mask_init
);
100 #include <linux/pageblock-flags.h>
104 #if (defined(CONFIG_KALLSYMS) \
105 && LTTNG_UBUNTU_KERNEL_RANGE(3,13,11,50, 3,14,0,0))
107 #include <linux/kallsyms.h>
108 #include <linux/mm_types.h>
109 #include <linux/module.h>
110 #include <wrapper/kallsyms.h>
111 #include <wrapper/page_alloc.h>
114 unsigned long (*get_pageblock_flags_mask_sym
)(struct page
*page
,
115 unsigned long end_bitidx
,
118 unsigned long wrapper_get_pageblock_flags_mask(struct page
*page
,
119 unsigned long end_bitidx
,
122 WARN_ON_ONCE(!get_pageblock_flags_mask_sym
);
123 if (get_pageblock_flags_mask_sym
) {
124 return get_pageblock_flags_mask_sym(page
, end_bitidx
, mask
);
129 EXPORT_SYMBOL_GPL(wrapper_get_pageblock_flags_mask
);
131 int wrapper_get_pageblock_flags_mask_init(void)
133 get_pageblock_flags_mask_sym
=
134 (void *) kallsyms_lookup_funcptr("get_pageblock_flags_mask");
135 if (!get_pageblock_flags_mask_sym
)
139 EXPORT_SYMBOL_GPL(wrapper_get_pfnblock_flags_mask_init
);
143 #include <linux/pageblock-flags.h>