path: root/arch
diff options
authorAlexey Brodkin <>2016-06-23 11:00:39 +0300
committerVineet Gupta <>2016-06-28 11:11:44 +0530
commit9bd54517ee86cb164c734f72ea95aeba4804f10b (patch)
tree61f77b7e5eed6cfd61b1586c52c80776c9dd647f /arch
parentf52e126cc7476196f44f3c313b7d9f0699a881fc (diff)
arc: unwind: warn only once if DW2_UNWIND is disabled
If CONFIG_ARC_DW2_UNWIND is disabled every time arc_unwind_core() gets called following message gets printed in debug console: ----------------->8--------------- CONFIG_ARC_DW2_UNWIND needs to be enabled ----------------->8--------------- That message makes sense if user indeed wants to see a backtrace or get nice function call-graphs in perf but what if user disabled unwinder for the purpose? Why pollute his debug console? So instead we'll warn user about possibly missing feature once and let him decide if that was what he or she really wanted. Signed-off-by: Alexey Brodkin <> Cc: Signed-off-by: Vineet Gupta <>
Diffstat (limited to 'arch')
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arc/kernel/stacktrace.c b/arch/arc/kernel/stacktrace.c
index e0efff1..b9192a6 100644
--- a/arch/arc/kernel/stacktrace.c
+++ b/arch/arc/kernel/stacktrace.c
@@ -142,7 +142,7 @@ arc_unwind_core(struct task_struct *tsk, struct pt_regs *regs,
* prelogue is setup (callee regs saved and then fp set and not other
* way around
- pr_warn("CONFIG_ARC_DW2_UNWIND needs to be enabled\n");
+ pr_warn_once("CONFIG_ARC_DW2_UNWIND needs to be enabled\n");
return 0;