diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-03-05 11:29:40 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-05-15 10:27:35 -0700 |
| commit | c3442697c2d73d3cdb9d4135cf630ad36ba8552f (patch) | |
| tree | cc3a55e788483920839bd14a2f4fd670e1524d14 | |
| parent | cee4393989333795ae04dc9f3b83a578afe3fca6 (diff) | |
softirq: Eliminate unused cond_resched_softirq() macro
The cond_resched_softirq() macro is not used anywhere in mainline, so
this commit simplifies the kernel by eliminating it.
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Tested-by: Nicholas Piggin <npiggin@gmail.com>
| -rw-r--r-- | include/linux/sched.h | 8 | ||||
| -rw-r--r-- | kernel/sched/core.c | 14 | ||||
| -rw-r--r-- | kernel/softirq.c | 3 |
3 files changed, 1 insertions, 24 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index b3d697f3b573..6fc99045658a 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1613,7 +1613,6 @@ static inline int test_tsk_need_resched(struct task_struct *tsk) * explicit rescheduling in places that are safe. The return * value indicates whether a reschedule was done in fact. * cond_resched_lock() will drop the spinlock before scheduling, - * cond_resched_softirq() will enable bhs before scheduling. */ #ifndef CONFIG_PREEMPT extern int _cond_resched(void); @@ -1633,13 +1632,6 @@ extern int __cond_resched_lock(spinlock_t *lock); __cond_resched_lock(lock); \ }) -extern int __cond_resched_softirq(void); - -#define cond_resched_softirq() ({ \ - ___might_sleep(__FILE__, __LINE__, SOFTIRQ_DISABLE_OFFSET); \ - __cond_resched_softirq(); \ -}) - static inline void cond_resched_rcu(void) { #if defined(CONFIG_DEBUG_ATOMIC_SLEEP) || !defined(CONFIG_PREEMPT_RCU) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 5e10aaeebfcc..6a09e6af64b9 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5012,20 +5012,6 @@ int __cond_resched_lock(spinlock_t *lock) } EXPORT_SYMBOL(__cond_resched_lock); -int __sched __cond_resched_softirq(void) -{ - BUG_ON(!in_softirq()); - - if (should_resched(SOFTIRQ_DISABLE_OFFSET)) { - local_bh_enable(); - preempt_schedule_common(); - local_bh_disable(); - return 1; - } - return 0; -} -EXPORT_SYMBOL(__cond_resched_softirq); - /** * yield - yield the current processor to other threads. * diff --git a/kernel/softirq.c b/kernel/softirq.c index 177de3640c78..03981f1c39ea 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -145,8 +145,7 @@ static void __local_bh_enable(unsigned int cnt) } /* - * Special-case - softirqs can safely be enabled in - * cond_resched_softirq(), or by __do_softirq(), + * Special-case - softirqs can safely be enabled by __do_softirq(), * without processing still-pending softirqs: */ void _local_bh_enable(void) |