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rcu: Update synchronize_rcu_mult() comment for call_rcu_hurry() 

Those who have worked with RCU for some time will naturally think in
terms of the long-standing call_rcu() API rather than the much newer
call_rcu_hurry() API.  But it is call_rcu_hurry() that you should normally
pass to synchronize_rcu_mult().  This commit therefore updates the header
comment to point this out.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
This commit is contained in:
Paul E. McKenney 2023-05-16 03:41:37 -07:00
parent 06c2afb862
commit 6716f4d39c
1 changed files with 5 additions and 0 deletions
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5
include/linux/rcupdate_wait.h
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@ -42,6 +42,11 @@ do { \
* call_srcu() function, with this wrapper supplying the pointer to the
* corresponding srcu_struct.
*
* Note that call_rcu_hurry() should be used instead of call_rcu()
* because in kernels built with CONFIG_RCU_LAZY=y the delay between the
* invocation of call_rcu() and that of the corresponding RCU callback
* can be multiple seconds.
*
* The first argument tells Tiny RCU's _wait_rcu_gp() not to
* bother waiting for RCU. The reason for this is because anywhere
* synchronize_rcu_mult() can be called is automatically already a full