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authorSven Schnelle <svens@linux.ibm.com>2019-12-18 08:44:26 +0100
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2019-12-21 16:08:22 -0500
commit01f36a554e3ef32f9fc4b81a4437cf08fd0e4742 (patch)
treef0ef6325d08529b98aee0e88ff5f3612e2ec5709 /samples
parent3a53acf1d9bea11b57c1f6205e3fe73f9d8a3688 (diff)
downloadlinux-01f36a554e3ef32f9fc4b81a4437cf08fd0e4742.tar.bz2
samples/trace_printk: Wait for IRQ work to finish
trace_printk schedules work via irq_work_queue(), but doesn't wait until it was processed. The kprobe_module.tc testcase does: :;: "Load module again, which means the event1 should be recorded";: modprobe trace-printk grep "event1:" trace so the grep which checks the trace file might run before the irq work was processed. Fix this by adding a irq_work_sync(). Link: http://lore.kernel.org/linux-trace-devel/20191218074427.96184-3-svens@linux.ibm.com Cc: stable@vger.kernel.org Fixes: af2a0750f3749 ("selftests/ftrace: Improve kprobe on module testcase to load/unload module") Signed-off-by: Sven Schnelle <svens@linux.ibm.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'samples')
-rw-r--r--samples/trace_printk/trace-printk.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/samples/trace_printk/trace-printk.c b/samples/trace_printk/trace-printk.c
index 7affc3b50b61..cfc159580263 100644
--- a/samples/trace_printk/trace-printk.c
+++ b/samples/trace_printk/trace-printk.c
@@ -36,6 +36,7 @@ static int __init trace_printk_init(void)
/* Kick off printing in irq context */
irq_work_queue(&irqwork);
+ irq_work_sync(&irqwork);
trace_printk("This is a %s that will use trace_bprintk()\n",
"static string");