[PATCH v8 1/6] tracing: Fix to set write permission to per-cpu buffer_size_kb

[Masami Hiramatsu (Google)]

From: Masami Hiramatsu (Google) <mhira...@kernel.org>

Since the per-cpu buffer_size_kb file is writable for changing
per-cpu ring buffer size, the file should have the write access
permission.

Fixes: 21ccc9cd7211 ("tracing: Disable "other" permission bits in the tracefs 
files")
Signed-off-by: Masami Hiramatsu (Google) <mhira...@kernel.org>
---
 Changes in v8: Newly added.
---
 kernel/trace/trace.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 845b8a165daf..fd470675809b 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -8613,7 +8613,7 @@ tracing_init_tracefs_percpu(struct trace_array *tr, long 
cpu)
        trace_create_cpu_file("stats", TRACE_MODE_READ, d_cpu,
                                tr, cpu, &tracing_stats_fops);
 
-       trace_create_cpu_file("buffer_size_kb", TRACE_MODE_READ, d_cpu,
+       trace_create_cpu_file("buffer_size_kb", TRACE_MODE_WRITE, d_cpu,
                                tr, cpu, &tracing_entries_fops);
 
        if (tr->range_addr_start)