diff options
| author | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2026-06-02 19:45:08 +0200 |
|---|---|---|
| committer | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2026-06-02 19:45:08 +0200 |
| commit | e853c1b28580ea93fda3cd729e440a3fc16fa647 (patch) | |
| tree | 49264154ae9d7fca30a2fa65df34de6a8f7e36e3 /include/linux | |
| parent | 956d852943621dff1d93fa6fa303d03fc0c869f3 (diff) | |
| parent | 002668809b068c528838c1ab1ff46c87bdbb095d (diff) | |
Merge branches 'rcutorture.2026.05.24' and 'misc.2026.05.24' into rcu-merge.2026.05.24
rcutorture.2026.05.24: Torture-test updates
misc.2026.05.24: Miscellaneous RCU updates
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/rcupdate.h | 12 | ||||
| -rw-r--r-- | include/linux/srcu.h | 2 |
2 files changed, 8 insertions, 6 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index bfa765132de8..5e95acc33989 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -592,11 +592,13 @@ context_unsafe( \ * lockdep checks for being in an RCU read-side critical section. This is * useful when the value of this pointer is accessed, but the pointer is * not dereferenced, for example, when testing an RCU-protected pointer - * against NULL. Although rcu_access_pointer() may also be used in cases - * where update-side locks prevent the value of the pointer from changing, - * you should instead use rcu_dereference_protected() for this use case. - * Within an RCU read-side critical section, there is little reason to - * use rcu_access_pointer(). + * against NULL. Within an RCU read-side critical section, there is little + * reason to use rcu_access_pointer(). Although rcu_access_pointer() may + * also be used in cases where update-side locks prevent the value of the + * pointer from changing, you should instead use rcu_dereference_protected() + * for this use case. It is also permissible to use rcu_access_pointer() + * within lockless updaters to obtain the old value for an atomic operation, + * for example, for cmpxchg(). * * It is usually best to test the rcu_access_pointer() return value * directly in order to avoid accidental dereferences being introduced diff --git a/include/linux/srcu.h b/include/linux/srcu.h index 81b1938512d5..a54ce9e808b9 100644 --- a/include/linux/srcu.h +++ b/include/linux/srcu.h @@ -397,7 +397,7 @@ static inline struct srcu_ctr __percpu *srcu_read_lock_fast_notrace(struct srcu_ * * The same srcu_struct may be used concurrently by srcu_down_read_fast() * and srcu_read_lock_fast(). However, the same definition/initialization - * requirements called out for srcu_read_lock_safe() apply. + * requirements called out for srcu_read_lock_fast_updown() apply. */ static inline struct srcu_ctr __percpu *srcu_down_read_fast(struct srcu_struct *ssp) __acquires_shared(ssp) { |