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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-03 20:29:53 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-03 20:29:53 +0300 |
commit | 4b978934a440c1aafce986353001b03289eaa040 (patch) | |
tree | e8e0b54d128e16c35ccf77b724d1640df12d82ba /include/linux | |
parent | 72a9cdd083005900f15934e8568f1ac43a6bb755 (diff) | |
parent | 2d8fbcd13ea1d0be3a7ea5f20c3a5b44b592e79c (diff) | |
download | linux-4b978934a440c1aafce986353001b03289eaa040.tar.xz |
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar:
"The main changes in this cycle were:
- Expedited grace-period changes, most notably avoiding having user
threads drive expedited grace periods, using a workqueue instead.
- Miscellaneous fixes, including a performance fix for lists that was
sent with the lists modifications.
- CPU hotplug updates, most notably providing exact CPU-online
tracking for RCU. This will in turn allow removal of the checks
supporting RCU's prior heuristic that was based on the assumption
that CPUs would take no longer than one jiffy to come online.
- Torture-test updates.
- Documentation updates"
* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
list: Expand list_first_entry_or_null()
torture: TOROUT_STRING(): Insert a space between flag and message
rcuperf: Consistently insert space between flag and message
rcutorture: Print out barrier error as document says
torture: Add task state to writer-task stall printk()s
torture: Convert torture_shutdown() to hrtimer
rcutorture: Convert to hotplug state machine
cpu/hotplug: Get rid of CPU_STARTING reference
rcu: Provide exact CPU-online tracking for RCU
rcu: Avoid redundant quiescent-state chasing
rcu: Don't use modular infrastructure in non-modular code
sched: Make wake_up_nohz_cpu() handle CPUs going offline
rcu: Use rcu_gp_kthread_wake() to wake up grace period kthreads
rcu: Use RCU's online-CPU state for expedited IPI retry
rcu: Exclude RCU-offline CPUs from expedited grace periods
rcu: Make expedited RCU CPU stall warnings respond to controls
rcu: Stop disabling expedited RCU CPU stall warnings
rcu: Drive expedited grace periods from workqueue
rcu: Consolidate expedited grace period machinery
documentation: Record reason for rcu_head two-byte alignment
...
Diffstat (limited to 'include/linux')
-rw-r--r-- | include/linux/list.h | 7 | ||||
-rw-r--r-- | include/linux/rcupdate.h | 1 | ||||
-rw-r--r-- | include/linux/torture.h | 2 |
3 files changed, 7 insertions, 3 deletions
diff --git a/include/linux/list.h b/include/linux/list.h index 5183138aa932..5809e9a2de5b 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -381,8 +381,11 @@ static inline void list_splice_tail_init(struct list_head *list, * * Note that if the list is empty, it returns NULL. */ -#define list_first_entry_or_null(ptr, type, member) \ - (!list_empty(ptr) ? list_first_entry(ptr, type, member) : NULL) +#define list_first_entry_or_null(ptr, type, member) ({ \ + struct list_head *head__ = (ptr); \ + struct list_head *pos__ = READ_ONCE(head__->next); \ + pos__ != head__ ? list_entry(pos__, type, member) : NULL; \ +}) /** * list_next_entry - get the next element in list diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index 1aa62e1a761b..321f9ed552a9 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -334,6 +334,7 @@ void rcu_sched_qs(void); void rcu_bh_qs(void); void rcu_check_callbacks(int user); void rcu_report_dead(unsigned int cpu); +void rcu_cpu_starting(unsigned int cpu); #ifndef CONFIG_TINY_RCU void rcu_end_inkernel_boot(void); diff --git a/include/linux/torture.h b/include/linux/torture.h index 6685a73736a2..a45702eb3e7b 100644 --- a/include/linux/torture.h +++ b/include/linux/torture.h @@ -43,7 +43,7 @@ #define TORTURE_FLAG "-torture:" #define TOROUT_STRING(s) \ - pr_alert("%s" TORTURE_FLAG s "\n", torture_type) + pr_alert("%s" TORTURE_FLAG " %s\n", torture_type, s) #define VERBOSE_TOROUT_STRING(s) \ do { if (verbose) pr_alert("%s" TORTURE_FLAG " %s\n", torture_type, s); } while (0) #define VERBOSE_TOROUT_ERRSTRING(s) \ |