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Subject[PATCH bpf-next 2/2] fprobe: Fix sparse warning for acccessing __rcu ftrace_hash
Date
Since ftrace_ops::local_hash::filter_hash field is an __rcu pointer,
we have to use rcu_access_pointer() to access it.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
kernel/trace/fprobe.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/fprobe.c b/kernel/trace/fprobe.c
index 63b2321b22a0..89d9f994ebb0 100644
--- a/kernel/trace/fprobe.c
+++ b/kernel/trace/fprobe.c
@@ -215,7 +215,7 @@ int register_fprobe(struct fprobe *fp, const char *filter, const char *notfilter
* correctly calculate the total number of filtered symbols
* from both filter and notfilter.
*/
- hash = fp->ops.local_hash.filter_hash;
+ hash = rcu_access_pointer(fp->ops.local_hash.filter_hash);
if (WARN_ON_ONCE(!hash))
goto out;

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