In this series, we are making lockdep use an rcuidle tracepoint. For this reason we need a notrace variant of srcu_dereference since otherwise we get lockdep splats since lockdep hooks may not have run yet. This patch adds the needed variant.
Cc: Steven Rostedt <rost...@goodmis.org> Cc: Peter Zilstra <pet...@infradead.org> Cc: Ingo Molnar <mi...@redhat.com> Cc: Mathieu Desnoyers <mathieu.desnoy...@efficios.com> Cc: Tom Zanussi <tom.zanu...@linux.intel.com> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Thomas Glexiner <t...@linutronix.de> Cc: Boqun Feng <boqun.f...@gmail.com> Cc: Paul McKenney <paul...@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Randy Dunlap <rdun...@infradead.org> Cc: Masami Hiramatsu <mhira...@kernel.org> Cc: Fenguang Wu <fengguang...@intel.com> Cc: Baohong Liu <baohong....@intel.com> Cc: Vedang Patel <vedang.pa...@intel.com> Cc: kernel-t...@android.com Signed-off-by: Joel Fernandes <joe...@google.com> --- include/linux/srcu.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/srcu.h b/include/linux/srcu.h index 2ec618979b20..a1c4947be877 100644 --- a/include/linux/srcu.h +++ b/include/linux/srcu.h @@ -135,6 +135,11 @@ static inline int srcu_read_lock_held(const struct srcu_struct *sp) */ #define srcu_dereference(p, sp) srcu_dereference_check((p), (sp), 0) +/** + * srcu_dereference_notrace - no tracing and no lockdep calls from here + */ +#define srcu_dereference_notrace(p, sp) srcu_dereference_check((p), (sp), 1) + /** * srcu_read_lock - register a new reader for an SRCU-protected structure. * @sp: srcu_struct in which to register the new reader. -- 2.17.0.441.gb46fe60e1d-goog
