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| author | Paul McKenney <paulmck@linux.vnet.ibm.com> | 2018-06-28 11:21:43 -0700 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-07-26 10:50:16 -0400 |
| commit | 1f45a4db3657c5ecafb7d3331536c987e6d18311 (patch) | |
| tree | a544fb87c9f624e7c21e1287400982bdd86d1c69 | |
| parent | 3e536e222f2930534c252c1cc7ae799c725c5ff9 (diff) | |
| download | linux-stable-1f45a4db3657c5ecafb7d3331536c987e6d18311.tar.gz linux-stable-1f45a4db3657c5ecafb7d3331536c987e6d18311.tar.bz2 linux-stable-1f45a4db3657c5ecafb7d3331536c987e6d18311.zip | |
srcu: Add notrace variants of srcu_read_{lock,unlock}
This is needed for a future tracepoint patch that uses srcu, and to make
sure it doesn't call into lockdep.
tracepoint code already calls notrace variants for rcu_read_lock_sched
so this patch does the same for srcu which will be used in a later
patch. Keeps it consistent with rcu-sched.
[Joel: Added commit message]
Link: http://lkml.kernel.org/r/20180628182149.226164-2-joel@joelfernandes.org
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Paul McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| -rw-r--r-- | include/linux/srcu.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/srcu.h b/include/linux/srcu.h index 91494d7e8e41..3e72a291c401 100644 --- a/include/linux/srcu.h +++ b/include/linux/srcu.h @@ -195,6 +195,16 @@ static inline int srcu_read_lock(struct srcu_struct *sp) __acquires(sp) return retval; } +/* Used by tracing, cannot be traced and cannot invoke lockdep. */ +static inline notrace int +srcu_read_lock_notrace(struct srcu_struct *sp) __acquires(sp) +{ + int retval; + + retval = __srcu_read_lock(sp); + return retval; +} + /** * srcu_read_unlock - unregister a old reader from an SRCU-protected structure. * @sp: srcu_struct in which to unregister the old reader. @@ -209,6 +219,13 @@ static inline void srcu_read_unlock(struct srcu_struct *sp, int idx) __srcu_read_unlock(sp, idx); } +/* Used by tracing, cannot be traced and cannot call lockdep. */ +static inline notrace void +srcu_read_unlock_notrace(struct srcu_struct *sp, int idx) __releases(sp) +{ + __srcu_read_unlock(sp, idx); +} + /** * smp_mb__after_srcu_read_unlock - ensure full ordering after srcu_read_unlock * |