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Merge branches 'doc.2019.12.10a', 'exp.2019.12.09a', 'fixes.2020.01.24a', 'kfree_rcu.2020.01.24a', 'list.2020.01.10a', 'preempt.2020.01.24a' and 'torture.2019.12.09a' into HEAD

Browse source 
doc.2019.12.10a: Documentations updates
exp.2019.12.09a: Expedited grace-period updates
fixes.2020.01.24a: Miscellaneous fixes
kfree_rcu.2020.01.24a: Batch kfree_rcu() work
list.2020.01.10a: RCU-protected-list updates
preempt.2020.01.24a: Preemptible RCU updates
torture.2019.12.09a: Torture-test updates
This commit is contained in:
Paul E. McKenney 2020-01-24 10:37:27 -08:00
commit 0e247386d9
39 changed files with 1070 additions and 575 deletions
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28
include/linux/rcupdate.h
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@ -154,7 +154,7 @@ static inline void exit_tasks_rcu_finish(void) { }
*
* This macro resembles cond_resched(), except that it is defined to
* report potential quiescent states to RCU-tasks even if the cond_resched()
* machinery were to be shut off, as some advocate for PREEMPT kernels.
* machinery were to be shut off, as some advocate for PREEMPTION kernels.
*/
#define cond_resched_tasks_rcu_qs() \
do { \
@ -167,7 +167,7 @@ do { \
* TREE_RCU and rcu_barrier_() primitives in TINY_RCU.
*/
#if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU)
#if defined(CONFIG_TREE_RCU)
#include <linux/rcutree.h>
#elif defined(CONFIG_TINY_RCU)
#include <linux/rcutiny.h>
@ -400,22 +400,6 @@ do { \
__tmp; \
})
/**
* rcu_swap_protected() - swap an RCU and a regular pointer
* @rcu_ptr: RCU pointer
* @ptr: regular pointer
* @c: the conditions under which the dereference will take place
*
* Perform swap(@rcu_ptr, @ptr) where @rcu_ptr is an RCU-annotated pointer and
* @c is the argument that is passed to the rcu_dereference_protected() call
* used to read that pointer.
*/
#define rcu_swap_protected(rcu_ptr, ptr, c) do { \
typeof(ptr) __tmp = rcu_dereference_protected((rcu_ptr), (c)); \
rcu_assign_pointer((rcu_ptr), (ptr)); \
(ptr) = __tmp; \
} while (0)
/**
* rcu_access_pointer() - fetch RCU pointer with no dereferencing
* @p: The pointer to read
@ -598,10 +582,10 @@ do { \
*
* You can avoid reading and understanding the next paragraph by
* following this rule: don't put anything in an rcu_read_lock() RCU
* read-side critical section that would block in a !PREEMPT kernel.
* read-side critical section that would block in a !PREEMPTION kernel.
* But if you want the full story, read on!
*
* In non-preemptible RCU implementations (TREE_RCU and TINY_RCU),
* In non-preemptible RCU implementations (pure TREE_RCU and TINY_RCU),
* it is illegal to block while in an RCU read-side critical section.
* In preemptible RCU implementations (PREEMPT_RCU) in CONFIG_PREEMPTION
* kernel builds, RCU read-side critical sections may be preempted,
@ -912,4 +896,8 @@ rcu_head_after_call_rcu(struct rcu_head *rhp, rcu_callback_t f)
return false;
}
/* kernel/ksysfs.c definitions */
extern int rcu_expedited;
extern int rcu_normal;
#endif /* __LINUX_RCUPDATE_H */