From 8487c23765b6e0444ec6b5f1530766d63fe68e35 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Mon, 12 May 2008 21:20:58 +0200 Subject: [PATCH] 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 Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- kernel/trace/trace.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 9197782d15c9..fd4ecc292005 100644 --- 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: -- 2.20.1