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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-01-11 13:28:19 -0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-01-11 13:28:19 -0200 |
| commit | 734d1ece37fbf3d2ddfc71bc6c69e0fe35f02542 (patch) | |
| tree | c4805dd7e746b1feb9e09e9849f3245d0b2c0c6b /include/linux/srcu.h | |
| parent | 216c82c6aba63eeb49d7654b448e0d47bea255bb (diff) | |
| parent | 9931faca02c604c22335f5a935a501bb2ace6e20 (diff) | |
Merge tag 'v3.8-rc3' into v4l_for_linus
Linux 3.8-rc3
* tag 'v3.8-rc3': (11110 commits)
Linux 3.8-rc3
mm: reinstante dropped pmd_trans_splitting() check
cred: Remove tgcred pointer from struct cred
drm/ttm: fix fence locking in ttm_buffer_object_transfer
ARM: clps711x: Fix bad merge of clockevents setup
ARM: highbank: save and restore L2 cache and GIC on suspend
ARM: highbank: add a power request clear
ARM: highbank: fix secondary boot and hotplug
ARM: highbank: fix typos with hignbank in power request functions
ARM: dts: fix highbank cpu mpidr values
ARM: dts: add device_type prop to cpu nodes on Calxeda platforms
drm/prime: drop reference on imported dma-buf come from gem
xen/netfront: improve truesize tracking
ARM: mx5: Fix MX53 flexcan2 clock
ARM: OMAP2+: am33xx-hwmod: Fix wrongly terminated am33xx_usbss_mpu_irqs array
sctp: fix Kconfig bug in default cookie hmac selection
EDAC: Cleanup device deregistering path
EDAC: Fix EDAC Kconfig menu
EDAC: Fix kernel panic on module unloading
ALSA: hda - add mute LED for HP Pavilion 17 (Realtek codec)
...
Diffstat (limited to 'include/linux/srcu.h')
| -rw-r--r-- | include/linux/srcu.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/linux/srcu.h b/include/linux/srcu.h index 55a5c52cbb2..6eb691b0835 100644 --- a/include/linux/srcu.h +++ b/include/linux/srcu.h @@ -16,8 +16,10 @@ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Copyright (C) IBM Corporation, 2006 + * Copyright (C) Fujitsu, 2012 * * Author: Paul McKenney <paulmck@us.ibm.com> + * Lai Jiangshan <laijs@cn.fujitsu.com> * * For detailed explanation of Read-Copy Update mechanism see - * Documentation/RCU/ *.txt @@ -40,6 +42,8 @@ struct rcu_batch { struct rcu_head *head, **tail; }; +#define RCU_BATCH_INIT(name) { NULL, &(name.head) } + struct srcu_struct { unsigned completed; struct srcu_struct_array __percpu *per_cpu_ref; @@ -70,12 +74,42 @@ int __init_srcu_struct(struct srcu_struct *sp, const char *name, __init_srcu_struct((sp), #sp, &__srcu_key); \ }) +#define __SRCU_DEP_MAP_INIT(srcu_name) .dep_map = { .name = #srcu_name }, #else /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */ int init_srcu_struct(struct srcu_struct *sp); +#define __SRCU_DEP_MAP_INIT(srcu_name) #endif /* #else #ifdef CONFIG_DEBUG_LOCK_ALLOC */ +void process_srcu(struct work_struct *work); + +#define __SRCU_STRUCT_INIT(name) \ + { \ + .completed = -300, \ + .per_cpu_ref = &name##_srcu_array, \ + .queue_lock = __SPIN_LOCK_UNLOCKED(name.queue_lock), \ + .running = false, \ + .batch_queue = RCU_BATCH_INIT(name.batch_queue), \ + .batch_check0 = RCU_BATCH_INIT(name.batch_check0), \ + .batch_check1 = RCU_BATCH_INIT(name.batch_check1), \ + .batch_done = RCU_BATCH_INIT(name.batch_done), \ + .work = __DELAYED_WORK_INITIALIZER(name.work, process_srcu, 0),\ + __SRCU_DEP_MAP_INIT(name) \ + } + +/* + * define and init a srcu struct at build time. + * dont't call init_srcu_struct() nor cleanup_srcu_struct() on it. + */ +#define DEFINE_SRCU(name) \ + static DEFINE_PER_CPU(struct srcu_struct_array, name##_srcu_array);\ + struct srcu_struct name = __SRCU_STRUCT_INIT(name); + +#define DEFINE_STATIC_SRCU(name) \ + static DEFINE_PER_CPU(struct srcu_struct_array, name##_srcu_array);\ + static struct srcu_struct name = __SRCU_STRUCT_INIT(name); + /** * call_srcu() - Queue a callback for invocation after an SRCU grace period * @sp: srcu_struct in queue the callback |