Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-23 12:42:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

ftrace: return EOF in trace_pipe on change of tracer

Browse Source 
Break out of while loop with EOF when the current_trace changes.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Steven Rostedt 2008-05-12 21:20:58 +02:00 committed by Thomas Gleixner
parent b5685aede3
commit 845279972f
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
kernel/trace/trace.c
View File

@ -2253,6 +2253,9 @@ tracing_read_pipe(struct file *filp, char __user *ubuf,
if (signal_pending(current))
return -EINTR;
if (iter->trace != current_trace)
return 0;
/*
* We block until we read something and tracing is disabled.
* We still block if tracing is disabled, but we have never