/*
* wrapper/page_alloc.c
*
- * 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.
+ * 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>
*
return 0;
}
-#else /* #if defined(CONFIG_KALLSYMS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,2)) */
+#else
#include <linux/pageblock-flags.h>
-#endif /* #else #if defined(CONFIG_KALLSYMS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,2)) */
+#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