diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2025-01-17 09:14:18 -0800 |
|---|---|---|
| committer | Boqun Feng <boqun.feng@gmail.com> | 2025-02-05 07:12:06 -0800 |
| commit | 729fb74889d94e6051d6ef2b21c769fe7e54f176 (patch) | |
| tree | 4b9445c1335258b4789c030354449ab1c4d04221 | |
| parent | dfe442c943b7ab86f3eb2228e32179bda1402e96 (diff) | |
srcu: Document that srcu_{read_lock,down_read}() can share srcu_struct
This commit adds a sentence to the srcu_down_read() function's kernel-doc
header noting that it is permissible to use srcu_down_read() and
srcu_read_lock() on the same srcu_struct, even concurrently.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: <bpf@vger.kernel.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
| -rw-r--r-- | include/linux/srcu.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/srcu.h b/include/linux/srcu.h index a0df80baaccf..317eab82a5f0 100644 --- a/include/linux/srcu.h +++ b/include/linux/srcu.h @@ -359,7 +359,8 @@ srcu_read_lock_notrace(struct srcu_struct *ssp) __acquires(ssp) * srcu_down_read() nor srcu_up_read() may be invoked from an NMI handler. * * Calls to srcu_down_read() may be nested, similar to the manner in - * which calls to down_read() may be nested. + * which calls to down_read() may be nested. The same srcu_struct may be + * used concurrently by srcu_down_read() and srcu_read_lock(). */ static inline int srcu_down_read(struct srcu_struct *ssp) __acquires(ssp) { |