diff options
| author | Gary Bisson <gary.bisson@boundarydevices.com> | 2018-09-18 11:07:53 +0200 |
|---|---|---|
| committer | Gary Bisson <gary.bisson@boundarydevices.com> | 2018-09-18 11:07:53 +0200 |
| commit | ded0ac8f40f9561d8ab2f8ef6c9ff8dc435f2b41 (patch) | |
| tree | 18a3de8603efe48e4d7c3036cf70d3b066de99a6 /kernel/trace | |
| parent | 6a71cbc089755afd6a86c005c22a1af6eab24a70 (diff) | |
| parent | 927556eb3a72306db1ba5ab8b9bb9914433302ba (diff) | |
Merge tag 'v4.9.127' into imx_4.9.x_2.3.0_ga
This is the 4.9.127 stable release
Conflicts:
drivers/gpu/drm/imx/imx-ldb.c
drivers/staging/android/ion/ion_priv.h
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/blktrace.c | 4 | ||||
| -rw-r--r-- | kernel/trace/trace.c | 9 | ||||
| -rw-r--r-- | kernel/trace/trace_uprobe.c | 2 |
3 files changed, 13 insertions, 2 deletions
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index 77bf690cbacb..55257a3763f9 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -1720,6 +1720,10 @@ static ssize_t sysfs_blk_trace_attr_store(struct device *dev, mutex_lock(&bdev->bd_mutex); if (attr == &dev_attr_enable) { + if (!!value == !!q->blk_trace) { + ret = 0; + goto out_unlock_bdev; + } if (value) ret = blk_trace_setup_queue(q, bdev); else diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 901c7f15f6e2..a47339b156ce 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2525,6 +2525,7 @@ out_nobuffer: } EXPORT_SYMBOL_GPL(trace_vbprintk); +__printf(3, 0) static int __trace_array_vprintk(struct ring_buffer *buffer, unsigned long ip, const char *fmt, va_list args) @@ -2579,12 +2580,14 @@ out_nobuffer: return len; } +__printf(3, 0) int trace_array_vprintk(struct trace_array *tr, unsigned long ip, const char *fmt, va_list args) { return __trace_array_vprintk(tr->trace_buffer.buffer, ip, fmt, args); } +__printf(3, 0) int trace_array_printk(struct trace_array *tr, unsigned long ip, const char *fmt, ...) { @@ -2600,6 +2603,7 @@ int trace_array_printk(struct trace_array *tr, return ret; } +__printf(3, 4) int trace_array_printk_buf(struct ring_buffer *buffer, unsigned long ip, const char *fmt, ...) { @@ -2615,6 +2619,7 @@ int trace_array_printk_buf(struct ring_buffer *buffer, return ret; } +__printf(2, 0) int trace_vprintk(unsigned long ip, const char *fmt, va_list args) { return trace_array_vprintk(&global_trace, ip, fmt, args); @@ -6915,7 +6920,9 @@ rb_simple_write(struct file *filp, const char __user *ubuf, if (buffer) { mutex_lock(&trace_types_lock); - if (val) { + if (!!val == tracer_tracing_is_on(tr)) { + val = 0; /* do nothing */ + } else if (val) { tracer_tracing_on(tr); if (tr->current_trace->start) tr->current_trace->start(tr); diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 788262984818..f0ab801a6437 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -969,7 +969,7 @@ probe_event_disable(struct trace_uprobe *tu, struct trace_event_file *file) list_del_rcu(&link->list); /* synchronize with u{,ret}probe_trace_func */ - synchronize_sched(); + synchronize_rcu(); kfree(link); if (!list_empty(&tu->tp.files)) |