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| author | Tejun Heo <tj@kernel.org> | 2026-10-07 08:01:02 -1000 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2026-10-07 08:01:02 -1000 |
| commit | 92b542db38bf7cb4de583b2ca37febc549db0ce4 (patch) | |
| tree | 30dcfdb338f7fdba597e1ec9314c2006df86f525 /include/linux/srcutiny.h | |
| parent | fee1265a725725dac0ff7459f912d69558798b36 (diff) | |
| parent | d1a4549a3645e55cc9ade09e360280590b3c9559 (diff) | |
| download | linux-next-92b542db38bf7cb4de583b2ca37febc549db0ce4.tar.gz linux-next-92b542db38bf7cb4de583b2ca37febc549db0ce4.zip | |
Merge branch 'for-7.3-fixes' into for-next
Diffstat (limited to 'include/linux/srcutiny.h')
| -rw-r--r-- | include/linux/srcutiny.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/srcutiny.h b/include/linux/srcutiny.h index 905b629e8fa3..fbcf13bc12d1 100644 --- a/include/linux/srcutiny.h +++ b/include/linux/srcutiny.h @@ -154,4 +154,17 @@ static inline void srcu_torture_stats_print(struct srcu_struct *ssp, data_race(READ_ONCE(ssp->srcu_idx_max))); } +/** + * srcu_readers_active - returns true if there are readers. and false otherwise. + * @ssp: which srcu_struct to count active readers (holding srcu_read_lock). + * + * Note that this is not an atomic primitive, and can therefore suffer + * severe errors when invoked on an active srcu_struct. That said, it + * can be useful as an error check at cleanup time. + */ +static inline bool srcu_readers_active(struct srcu_struct *ssp) +{ + return READ_ONCE(ssp->srcu_lock_nesting[0]) || READ_ONCE(ssp->srcu_lock_nesting[1]); +} + #endif |