From dfa12b2ee71e713596da79b49962098d716cef2b Mon Sep 17 00:00:00 2001
From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Mon, 13 Apr 2020 12:31:00 -0400
Subject: [PATCH] wrapper: remove writeback wrapper

---
 probes/lttng-probe-writeback.c |  1 -
 wrapper/writeback.h            | 71 ----------------------------------
 2 files changed, 72 deletions(-)
 delete mode 100644 wrapper/writeback.h

diff --git a/probes/lttng-probe-writeback.c b/probes/lttng-probe-writeback.c
index 38d1341c..14495db9 100644
--- a/probes/lttng-probe-writeback.c
+++ b/probes/lttng-probe-writeback.c
@@ -20,7 +20,6 @@
 #include <trace/events/writeback.h>
 
 #include <lttng-kernel-version.h>
-#include <wrapper/writeback.h>
 
 /* #if <check version number if global_dirty_limit will be exported> */
 
diff --git a/wrapper/writeback.h b/wrapper/writeback.h
deleted file mode 100644
index c37bd8be..00000000
--- a/wrapper/writeback.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
- *
- * wrapper/writeback.h
- *
- * wrapper around global_dirty_limit read. Using KALLSYMS with KALLSYMS_ALL
- * to get its address when available, else we need to have a kernel that
- * exports this variable to GPL modules.
- *
- * Copyright (C) 2013 Mentor Graphics Corp.
- */
-
-#ifndef _LTTNG_WRAPPER_WRITEBACK_H
-#define _LTTNG_WRAPPER_WRITEBACK_H
-
-#include <lttng-kernel-version.h>
-
-#ifdef CONFIG_KALLSYMS_ALL
-#include <linux/kallsyms.h>
-#include <wrapper/kallsyms.h>
-
-
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0)
-
-static struct wb_domain *global_wb_domain_sym;
-
-static inline
-unsigned long wrapper_global_dirty_limit(void)
-{
-	if (!global_wb_domain_sym)
-		global_wb_domain_sym =
-			(void *) kallsyms_lookup_dataptr("global_wb_domain");
-	if (global_wb_domain_sym) {
-		return global_wb_domain_sym->dirty_limit;
-	} else {
-		printk_once(KERN_WARNING "LTTng: global_wb_domain symbol lookup failed.\n");
-		return 0;
-	}
-}
-#else
-
-static unsigned long *global_dirty_limit_sym;
-
-static inline
-unsigned long wrapper_global_dirty_limit(void)
-{
-	if (!global_dirty_limit_sym)
-		global_dirty_limit_sym =
-			(void *) kallsyms_lookup_dataptr("global_dirty_limit");
-	if (global_dirty_limit_sym) {
-		return *global_dirty_limit_sym;
-	} else {
-		printk_once(KERN_WARNING "LTTng: global_dirty_limit symbol lookup failed.\n");
-		return 0;
-	}
-}
-#endif
-
-#else /* CONFIG_KALLSYMS_ALL */
-
-#include <linux/writeback.h>
-
-static inline
-unsigned long wrapper_global_dirty_limit(void)
-{
-	return global_dirty_limit;
-}
-
-#endif
-
-#endif /* _LTTNG_WRAPPER_WRITEBACK_H */
-- 
2.34.1