LU-12323 libcfs: check if save_stack_trace_tsk is exported

[fs/lustre-release.git] / libcfs / libcfs / linux / linux-debug.c

diff --git a/libcfs/libcfs/linux/linux-debug.c b/libcfs/libcfs/linux/linux-debug.c
index 46fbc29..aa01487 100644 (file)
--- a/libcfs/libcfs/linux/linux-debug.c
+++ b/libcfs/libcfs/linux/linux-debug.c
@@ -115,6 +115,16 @@ EXPORT_SYMBOL(lbug_with_loc);
 
 #ifdef CONFIG_STACKTRACE
 
+#ifndef HAVE_SAVE_STACK_TRACE_TSK
+#define save_stack_trace_tsk(tsk, trace)                                      \
+do {                                                                          \
+       if (tsk == current)                                                    \
+               save_stack_trace(trace);                                       \
+       else                                                                   \
+               pr_info("No stack, save_stack_trace_tsk() not exported\n");    \
+} while (0)
+#endif
+
 #define MAX_ST_ENTRIES 100
 static DEFINE_SPINLOCK(st_lock);