Messages in this thread Patch in this message | | | From | Namhyung Kim <> | Subject | [PATCH] tracing: Check return value of tracing_dentry_percpu() | Date | Mon, 23 Apr 2012 10:11:57 +0900 |
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If tracing_dentry_percpu() failed, tracing_init_debugfs_percpu() will try to create each cpu directories on debugfs' root directory as d_percpu is NULL.
Signed-off-by: Namhyung Kim <namhyung.kim@lge.com> --- kernel/trace/trace.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index ed7b5d1e12f4..54df9a672fd9 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -4367,6 +4367,9 @@ static void tracing_init_debugfs_percpu(long cpu) struct dentry *d_cpu; char cpu_dir[30]; /* 30 characters should be more than enough */ + if (!d_percpu) + return; + snprintf(cpu_dir, 30, "cpu%ld", cpu); d_cpu = debugfs_create_dir(cpu_dir, d_percpu); if (!d_cpu) { -- 1.7.10
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