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| author |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-07-10 12:53:40 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-08-30 16:03:36 -0700 |
| commit | 4d232dfe1df35254298e7986c4de8c9f63f58c79 (patch) | |
| tree | b8f02f4cffc4f50a18d5881f9b7d28953315645c /include/linux/rcupdate.h | |
| parent | rcu: Clean up flavor-related definitions and comments in update.c (diff) | |
| download | linux-dev-4d232dfe1df35254298e7986c4de8c9f63f58c79.tar.xz linux-dev-4d232dfe1df35254298e7986c4de8c9f63f58c79.zip | |
rcu: Remove !PREEMPT code from rcu_note_voluntary_context_switch()
Because RCU-tasks exists only in PREEMPT kernels and because RCU-sched
no longer exists in PREEMPT kernels, it is no longer necessary for the
rcu_note_voluntary_context_switch() macro to do anything for !PREEMPT
kernels. This commit therefore removes !PREEMPT-related code from
this macro, namely, the rcu_all_qs().
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'include/linux/rcupdate.h')
| -rw-r--r-- | include/linux/rcupdate.h | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index d6d543b60a9f..e4f821165d0b 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -150,18 +150,14 @@ static inline void rcu_init_nohz(void) { } if (READ_ONCE((t)->rcu_tasks_holdout)) \ WRITE_ONCE((t)->rcu_tasks_holdout, false); \ } while (0) -#define rcu_note_voluntary_context_switch(t) \ - do { \ - rcu_all_qs(); \ - rcu_tasks_qs(t); \ - } while (0) +#define rcu_note_voluntary_context_switch(t) rcu_tasks_qs(t) void call_rcu_tasks(struct rcu_head *head, rcu_callback_t func); void synchronize_rcu_tasks(void); void exit_tasks_rcu_start(void); void exit_tasks_rcu_finish(void); #else /* #ifdef CONFIG_TASKS_RCU */ #define rcu_tasks_qs(t) do { } while (0) -#define rcu_note_voluntary_context_switch(t) rcu_all_qs() +#define rcu_note_voluntary_context_switch(t) do { } while (0) #define call_rcu_tasks call_rcu #define synchronize_rcu_tasks synchronize_rcu static inline void exit_tasks_rcu_start(void) { } |