X-Git-Url: http://git.lttng.org/?p=lttng-modules.git;a=blobdiff_plain;f=include%2Finstrumentation%2Fevents%2Fwriteback.h;h=f05708a8376c6f949665eae06b19c4087977cf75;hp=f24237b296f507283c1a3c46bcfbf372764c64fe;hb=dbabd7296e9bcfb263f96e78c185f1eb7346ee53;hpb=b1fdcb19f150295c9db01ac6a52b95e627cb8903

diff --git a/include/instrumentation/events/writeback.h b/include/instrumentation/events/writeback.h
index f24237b2..f05708a8 100644
--- a/include/instrumentation/events/writeback.h
+++ b/include/instrumentation/events/writeback.h
@@ -14,9 +14,12 @@
 #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);