diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/srcutree.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/srcutree.h b/include/linux/srcutree.h index e29cc57eac81..f41bb3a55a04 100644 --- a/include/linux/srcutree.h +++ b/include/linux/srcutree.h @@ -211,6 +211,13 @@ void synchronize_srcu_expedited(struct srcu_struct *ssp); void srcu_barrier(struct srcu_struct *ssp); void srcu_torture_stats_print(struct srcu_struct *ssp, char *tt, char *tf); +// Converts a per-CPU pointer to an ->srcu_ctrs[] array element to that +// element's index. +static inline bool __srcu_ptr_to_ctr(struct srcu_struct *ssp, struct srcu_ctr __percpu *scpp) +{ + return scpp - &ssp->sda->srcu_ctrs[0]; +} + /* * Counts the new reader in the appropriate per-CPU element of the * srcu_struct. Returns an index that must be passed to the matching @@ -228,7 +235,7 @@ static inline int __srcu_read_lock_lite(struct srcu_struct *ssp) RCU_LOCKDEP_WARN(!rcu_is_watching(), "RCU must be watching srcu_read_lock_lite()."); this_cpu_inc(scp->srcu_locks.counter); /* Y */ barrier(); /* Avoid leaking the critical section. */ - return scp - &ssp->sda->srcu_ctrs[0]; + return __srcu_ptr_to_ctr(ssp, scp); } /* |