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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-25 12:04:11 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-25 12:04:11 -0700 |
commit | df00ccca7201dcb78847de68538486dbcfa5deba (patch) | |
tree | 2e572a32d6d19e9be5736b82a62f4c23f6eac2d3 /kernel/rcu/tree.h | |
parent | dd9506954539dcedd0294a065ff0976e61386fc6 (diff) | |
parent | 54d5f16e55a7cdd64e0f6bcadf2b5f871f94bb83 (diff) | |
download | linux-stable-df00ccca7201dcb78847de68538486dbcfa5deba.tar.gz linux-stable-df00ccca7201dcb78847de68538486dbcfa5deba.tar.bz2 linux-stable-df00ccca7201dcb78847de68538486dbcfa5deba.zip |
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:
- documentation updates
- miscellaneous fixes
- minor reorganization of code
- torture-test updates"
* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
rcu: Correctly handle sparse possible cpus
rcu: sysctl: Panic on RCU Stall
rcu: Fix a typo in a comment
rcu: Make call_rcu_tasks() tolerate first call with irqs disabled
rcu: Disable TASKS_RCU for usermode Linux
rcu: No ordering for rcu_assign_pointer() of NULL
rcutorture: Fix error return code in rcu_perf_init()
torture: Inflict default jitter
rcuperf: Don't treat gp_exp mis-setting as a WARN
rcutorture: Drop "-soundhw pcspkr" from x86 boot arguments
rcutorture: Don't specify the cpu type of QEMU on PPC
rcutorture: Make -soundhw a x86 specific option
rcutorture: Use vmlinux as the fallback kernel image
rcutorture/doc: Create initrd using dracut
torture: Stop onoff task if there is only one cpu
torture: Add starvation events to error summary
torture: Break online and offline functions out of torture_onoff()
torture: Forgive lengthy trace dumps and preemption
torture: Remove CONFIG_RCU_TORTURE_TEST_RUNNABLE, simplify code
torture: Simplify code, eliminate RCU_PERF_TEST_RUNNABLE
...
Diffstat (limited to 'kernel/rcu/tree.h')
-rw-r--r-- | kernel/rcu/tree.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index e3959f5e6ddf..f714f873bf9d 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -254,6 +254,13 @@ struct rcu_node { } ____cacheline_internodealigned_in_smp; /* + * Bitmasks in an rcu_node cover the interval [grplo, grphi] of CPU IDs, and + * are indexed relative to this interval rather than the global CPU ID space. + * This generates the bit for a CPU in node-local masks. + */ +#define leaf_node_cpu_bit(rnp, cpu) (1UL << ((cpu) - (rnp)->grplo)) + +/* * Do a full breadth-first scan of the rcu_node structures for the * specified rcu_state structure. */ @@ -281,6 +288,14 @@ struct rcu_node { (rnp) < &(rsp)->node[rcu_num_nodes]; (rnp)++) /* + * 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); \ + cpu <= rnp->grphi; \ + cpu = cpumask_next((cpu), cpu_possible_mask)) + +/* * Union to allow "aggregate OR" operation on the need for a quiescent * state by the normal and expedited grace periods. */ |