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Merge branches 'doc.2020.02.27a', 'fixes.2020.03.21a', 'kfree_rcu.2020.02.20a', 'locktorture.2020.02.20a', 'ovld.2020.02.20a', 'rcu-tasks.2020.02.20a', 'srcu.2020.02.20a' and 'torture.2020.02.20a' into HEAD

Browse Source 
doc.2020.02.27a: Documentation updates.
fixes.2020.03.21a: Miscellaneous fixes.
kfree_rcu.2020.02.20a: Updates to kfree_rcu().
locktorture.2020.02.20a: Lock torture-test updates.
ovld.2020.02.20a: Updates to callback-overload handling.
rcu-tasks.2020.02.20a: RCU-tasks updates.
srcu.2020.02.20a: SRCU updates.
torture.2020.02.20a: Torture-test updates.
This commit is contained in:
Paul E. McKenney
2020-03-21 17:15:11 -07:00
parent 8149b5cbfa 127e29815b 613707929b 28e09a2e48 b692dc4adf 90ba11ba99 710426068d a144935cea
commit aa93ec620b
29 changed files with 644 additions and 203 deletions
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23
kernel/rcu/rcu.h
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@@ -198,6 +198,13 @@ static inline void debug_rcu_head_unqueue(struct rcu_head *head)
}
#endif /* #else !CONFIG_DEBUG_OBJECTS_RCU_HEAD */
extern int rcu_cpu_stall_suppress_at_boot;
static inline bool rcu_stall_is_suppressed_at_boot(void)
{
return rcu_cpu_stall_suppress_at_boot && !rcu_inkernel_boot_has_ended();
}
#ifdef CONFIG_RCU_STALL_COMMON
extern int rcu_cpu_stall_ftrace_dump;
@@ -205,6 +212,11 @@ extern int rcu_cpu_stall_suppress;
extern int rcu_cpu_stall_timeout;
int rcu_jiffies_till_stall_check(void);
static inline bool rcu_stall_is_suppressed(void)
{
return rcu_stall_is_suppressed_at_boot() || rcu_cpu_stall_suppress;
}
#define rcu_ftrace_dump_stall_suppress() \
do { \
if (!rcu_cpu_stall_suppress) \
@@ -218,6 +230,11 @@ do { \
} while (0)
#else /* #endif #ifdef CONFIG_RCU_STALL_COMMON */
static inline bool rcu_stall_is_suppressed(void)
{
return rcu_stall_is_suppressed_at_boot();
}
#define rcu_ftrace_dump_stall_suppress()
#define rcu_ftrace_dump_stall_unsuppress()
#endif /* #ifdef CONFIG_RCU_STALL_COMMON */
@@ -325,7 +342,8 @@ static inline void rcu_init_levelspread(int *levelspread, const int *levelcnt)
* Iterate over all possible CPUs in a leaf RCU node.
*/
#define for_each_leaf_node_possible_cpu(rnp, cpu) \
for ((cpu) = cpumask_next((rnp)->grplo - 1, cpu_possible_mask); \
for (WARN_ON_ONCE(!rcu_is_leaf_node(rnp)), \
(cpu) = cpumask_next((rnp)->grplo - 1, cpu_possible_mask); \
(cpu) <= rnp->grphi; \
(cpu) = cpumask_next((cpu), cpu_possible_mask))
@@ -335,7 +353,8 @@ static inline void rcu_init_levelspread(int *levelspread, const int *levelcnt)
#define rcu_find_next_bit(rnp, cpu, mask) \
((rnp)->grplo + find_next_bit(&(mask), BITS_PER_LONG, (cpu)))
#define for_each_leaf_node_cpu_mask(rnp, cpu, mask) \
for ((cpu) = rcu_find_next_bit((rnp), 0, (mask)); \
for (WARN_ON_ONCE(!rcu_is_leaf_node(rnp)), \
(cpu) = rcu_find_next_bit((rnp), 0, (mask)); \
(cpu) <= rnp->grphi; \
(cpu) = rcu_find_next_bit((rnp), (cpu) + 1 - (rnp->grplo), (mask)))