-#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0)
+#if LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,2,0)
static struct wb_domain *global_wb_domain_sym;
return 0;
}
}
-#else
+
+/*
+ * Canary function to check for 'global_wb_domain' at compile time.
+ *
+ * From 'include/linux/writeback.h':
+ *
+ * extern struct wb_domain global_wb_domain;
+ */
+static inline
+unsigned long __canary__global_wb_domain(void)
+{
+ return global_wb_domain.dirty_limit;
+}
+
+#elif LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,1,0)
static unsigned long *global_dirty_limit_sym;
return 0;
}
}
+
+/*
+ * Canary function to check for 'global_dirty_limit' at compile time.
+ *
+ * From 'include/linux/writeback.h':
+ *
+ * extern unsigned long global_dirty_limit;
+ */
+static inline
+unsigned long __canary__global_dirty_limit(void)
+{
+ return global_dirty_limit;
+}
+
#endif
#else /* CONFIG_KALLSYMS_ALL */
#include <linux/writeback.h>
+#if LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,1,0)
static inline
unsigned long wrapper_global_dirty_limit(void)
{
return global_dirty_limit;
}
+#endif
#endif