X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=instrumentation%2Fevents%2Flttng-module%2Fwriteback.h;fp=instrumentation%2Fevents%2Flttng-module%2Fwriteback.h;h=4b58ff36eb999e6a7fedecefedc21ec93679fdf9;hb=5873cbc67601a95b53e8c87fbeafb31910485fd0;hp=4c2a757236a01b3f2586704a8490392396f8df58;hpb=3b8be22c3ca66adaf88b3d8fe9adf42c3dd3141e;p=lttng-modules.git

diff --git a/instrumentation/events/lttng-module/writeback.h b/instrumentation/events/lttng-module/writeback.h
index 4c2a7572..4b58ff36 100644
--- a/instrumentation/events/lttng-module/writeback.h
+++ b/instrumentation/events/lttng-module/writeback.h
@@ -13,9 +13,12 @@
 #ifndef _TRACE_WRITEBACK_DEF_
 #define _TRACE_WRITEBACK_DEF_
 
-#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0) ||	\
-	LTTNG_KERNEL_RANGE(5,5,3, 5,6,0) ||			\
-	LTTNG_KERNEL_RANGE(5,4,19, 5,5,0))
+/*
+ * Use the GPL-exported bdi_dev_name introduced in kernel 5.7. Do not use
+ * static inline bdi_dev_name in prior kernels because it uses the bdi_unknown_name
+ * symbol which is not exported to GPL modules.
+ */
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,7,0))
 static inline const char *lttng_bdi_dev_name(struct backing_dev_info *bdi)
 {
 	return bdi_dev_name(bdi);