Merge tag 'trace-seq-buf-3.19-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixlet from Steven Rostedt:
"Remove unnecessary preempt_disable in printk()"
* tag 'trace-seq-buf-3.19-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
printk: Do not disable preemption for accessing printk_func
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index f900dc9..02d6b6d 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -1857,10 +1857,16 @@
int r;
va_start(args, fmt);
- preempt_disable();
+
+ /*
+ * If a caller overrides the per_cpu printk_func, then it needs
+ * to disable preemption when calling printk(). Otherwise
+ * the printk_func should be set to the default. No need to
+ * disable preemption here.
+ */
vprintk_func = this_cpu_read(printk_func);
r = vprintk_func(fmt, args);
- preempt_enable();
+
va_end(args);
return r;