/usr/src/lttng-modules-2.7.1/wrapper/page_alloc.h is in lttng-modules-dkms 2.7.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | #ifndef _LTTNG_WRAPPER_PAGE_ALLOC_H
#define _LTTNG_WRAPPER_PAGE_ALLOC_H
/*
* wrapper/page_alloc.h
*
* wrapper around get_pfnblock_flags_mask. Using KALLSYMS to get its 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"
/*
* We need to redefine get_pfnblock_flags_mask to our wrapper, because
* the get_pageblock_migratetype() macro uses it.
*/
#if (defined(CONFIG_KALLSYMS) \
&& (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,2) \
|| LTTNG_DEBIAN_KERNEL_RANGE(3,16,7,9,0,0, 3,17,0,0,0,0)))
#define get_pfnblock_flags_mask wrapper_get_pfnblock_flags_mask
#include <linux/mm_types.h>
int wrapper_get_pfnblock_flags_mask_init(void);
#else
#include <linux/mm_types.h>
static inline
int wrapper_get_pfnblock_flags_mask_init(void)
{
return 0;
}
#endif
/*
* For a specific range of Ubuntu 3.13 kernels, we need to redefine
* get_pageblock_flags_mask to our wrapper, because the
* get_pageblock_migratetype() macro uses it. This function has been
* introduced into mainline within commit
* e58469bafd0524e848c3733bc3918d854595e20f, but never actually showed
* up in a stable kernel version, since it has been changed by commit
* dc4b0caff24d9b2918e9f27bc65499ee63187eba. Since Ubuntu chose to only
* backport the former commit but not the latter, we need to do a
* special case to cover this.
*/
#if (defined(CONFIG_KALLSYMS) \
&& LTTNG_UBUNTU_KERNEL_RANGE(3,13,11,50, 3,14,0,0))
#define get_pageblock_flags_mask wrapper_get_pageblock_flags_mask
#include <linux/mm_types.h>
int wrapper_get_pageblock_flags_mask_init(void);
#else
#include <linux/mm_types.h>
static inline
int wrapper_get_pageblock_flags_mask_init(void)
{
return 0;
}
#endif
#endif /* _LTTNG_WRAPPER_PAGE_ALLOC_H */
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