ftrace: allow trace_pipe to block on all reads

We expect things like "cat" to block on reads to trace_pipe. That's what trace_pipe is for. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
git-mirror · May 23, 2008 · 8487c23 · 8487c23
1 parent d17d969
commit 8487c23
Showing 1 changed file with 0 additions and 2 deletions.
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
@@ -2231,8 +2231,6 @@ tracing_read_pipe(struct file *filp, char __user *ubuf,
 	start = 0;
 
 	while (trace_empty(iter)) {
-		if (!(trace_flags & TRACE_ITER_BLOCK))
-			return -EWOULDBLOCK;
 		/*
 		 * This is a make-shift waitqueue. The reason we don't use
 		 * an actual wait queue is because: