Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Percpu refcounts: |
| 3 | * (C) 2012 Google, Inc. |
| 4 | * Author: Kent Overstreet <koverstreet@google.com> |
| 5 | * |
| 6 | * This implements a refcount with similar semantics to atomic_t - atomic_inc(), |
| 7 | * atomic_dec_and_test() - but percpu. |
| 8 | * |
| 9 | * There's one important difference between percpu refs and normal atomic_t |
| 10 | * refcounts; you have to keep track of your initial refcount, and then when you |
| 11 | * start shutting down you call percpu_ref_kill() _before_ dropping the initial |
| 12 | * refcount. |
| 13 | * |
| 14 | * The refcount will have a range of 0 to ((1U << 31) - 1), i.e. one bit less |
| 15 | * than an atomic_t - this is because of the way shutdown works, see |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 16 | * percpu_ref_kill()/PERCPU_COUNT_BIAS. |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 17 | * |
| 18 | * Before you call percpu_ref_kill(), percpu_ref_put() does not check for the |
| 19 | * refcount hitting 0 - it can't, if it was in percpu mode. percpu_ref_kill() |
| 20 | * puts the ref back in single atomic_t mode, collecting the per cpu refs and |
| 21 | * issuing the appropriate barriers, and then marks the ref as shutting down so |
| 22 | * that percpu_ref_put() will check for the ref hitting 0. After it returns, |
| 23 | * it's safe to drop the initial ref. |
| 24 | * |
| 25 | * USAGE: |
| 26 | * |
| 27 | * See fs/aio.c for some example usage; it's used there for struct kioctx, which |
| 28 | * is created when userspaces calls io_setup(), and destroyed when userspace |
| 29 | * calls io_destroy() or the process exits. |
| 30 | * |
| 31 | * In the aio code, kill_ioctx() is called when we wish to destroy a kioctx; it |
Jesper Dangaard Brouer | d7cdb96 | 2014-06-20 17:19:06 +0200 | [diff] [blame] | 32 | * calls percpu_ref_kill(), then hlist_del_rcu() and synchronize_rcu() to remove |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 33 | * the kioctx from the proccess's list of kioctxs - after that, there can't be |
| 34 | * any new users of the kioctx (from lookup_ioctx()) and it's then safe to drop |
| 35 | * the initial ref with percpu_ref_put(). |
| 36 | * |
| 37 | * Code that does a two stage shutdown like this often needs some kind of |
| 38 | * explicit synchronization to ensure the initial refcount can only be dropped |
| 39 | * once - percpu_ref_kill() does this for you, it returns true once and false if |
| 40 | * someone else already called it. The aio code uses it this way, but it's not |
| 41 | * necessary if the code has some other mechanism to synchronize teardown. |
| 42 | * around. |
| 43 | */ |
| 44 | |
| 45 | #ifndef _LINUX_PERCPU_REFCOUNT_H |
| 46 | #define _LINUX_PERCPU_REFCOUNT_H |
| 47 | |
| 48 | #include <linux/atomic.h> |
| 49 | #include <linux/kernel.h> |
| 50 | #include <linux/percpu.h> |
| 51 | #include <linux/rcupdate.h> |
Tejun Heo | a34375e | 2014-09-08 09:51:30 +0900 | [diff] [blame] | 52 | #include <linux/gfp.h> |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 53 | |
| 54 | struct percpu_ref; |
Tejun Heo | ac89906 | 2013-06-12 20:43:06 -0700 | [diff] [blame] | 55 | typedef void (percpu_ref_func_t)(struct percpu_ref *); |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 56 | |
Tejun Heo | 9e804d1 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 57 | /* flags set in the lower bits of percpu_ref->percpu_count_ptr */ |
| 58 | enum { |
| 59 | __PERCPU_REF_ATOMIC = 1LU << 0, /* operating in atomic mode */ |
Tejun Heo | 27344a9 | 2014-09-24 13:31:49 -0400 | [diff] [blame] | 60 | __PERCPU_REF_DEAD = 1LU << 1, /* (being) killed */ |
| 61 | __PERCPU_REF_ATOMIC_DEAD = __PERCPU_REF_ATOMIC | __PERCPU_REF_DEAD, |
| 62 | |
| 63 | __PERCPU_REF_FLAG_BITS = 2, |
Tejun Heo | 9e804d1 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 64 | }; |
| 65 | |
Tejun Heo | 2aad2a8 | 2014-09-24 13:31:50 -0400 | [diff] [blame] | 66 | /* @flags for percpu_ref_init() */ |
| 67 | enum { |
| 68 | /* |
| 69 | * Start w/ ref == 1 in atomic mode. Can be switched to percpu |
Tejun Heo | 1cae13e | 2014-09-24 13:31:50 -0400 | [diff] [blame] | 70 | * operation using percpu_ref_switch_to_percpu(). If initialized |
| 71 | * with this flag, the ref will stay in atomic mode until |
| 72 | * percpu_ref_switch_to_percpu() is invoked on it. |
Tejun Heo | 2aad2a8 | 2014-09-24 13:31:50 -0400 | [diff] [blame] | 73 | */ |
| 74 | PERCPU_REF_INIT_ATOMIC = 1 << 0, |
| 75 | |
| 76 | /* |
| 77 | * Start dead w/ ref == 0 in atomic mode. Must be revived with |
| 78 | * percpu_ref_reinit() before used. Implies INIT_ATOMIC. |
| 79 | */ |
| 80 | PERCPU_REF_INIT_DEAD = 1 << 1, |
| 81 | }; |
| 82 | |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 83 | struct percpu_ref { |
Tejun Heo | e625305 | 2014-09-20 01:27:25 -0400 | [diff] [blame] | 84 | atomic_long_t count; |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 85 | /* |
| 86 | * The low bit of the pointer indicates whether the ref is in percpu |
Tejun Heo | 9a1049d | 2014-06-28 08:10:14 -0400 | [diff] [blame] | 87 | * mode; if set, then get/put will manipulate the atomic_t. |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 88 | */ |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 89 | unsigned long percpu_count_ptr; |
Tejun Heo | ac89906 | 2013-06-12 20:43:06 -0700 | [diff] [blame] | 90 | percpu_ref_func_t *release; |
Tejun Heo | 9e804d1 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 91 | percpu_ref_func_t *confirm_switch; |
Tejun Heo | 1cae13e | 2014-09-24 13:31:50 -0400 | [diff] [blame] | 92 | bool force_atomic:1; |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 93 | struct rcu_head rcu; |
| 94 | }; |
| 95 | |
Tejun Heo | acac788 | 2013-06-12 20:52:01 -0700 | [diff] [blame] | 96 | int __must_check percpu_ref_init(struct percpu_ref *ref, |
Tejun Heo | 2aad2a8 | 2014-09-24 13:31:50 -0400 | [diff] [blame] | 97 | percpu_ref_func_t *release, unsigned int flags, |
| 98 | gfp_t gfp); |
Tejun Heo | 9a1049d | 2014-06-28 08:10:14 -0400 | [diff] [blame] | 99 | void percpu_ref_exit(struct percpu_ref *ref); |
Tejun Heo | 490c79a | 2014-09-24 13:31:49 -0400 | [diff] [blame] | 100 | void percpu_ref_switch_to_atomic(struct percpu_ref *ref, |
| 101 | percpu_ref_func_t *confirm_switch); |
Tejun Heo | f47ad45 | 2014-09-24 13:31:49 -0400 | [diff] [blame] | 102 | void percpu_ref_switch_to_percpu(struct percpu_ref *ref); |
Tejun Heo | dbece3a | 2013-06-13 19:23:53 -0700 | [diff] [blame] | 103 | void percpu_ref_kill_and_confirm(struct percpu_ref *ref, |
| 104 | percpu_ref_func_t *confirm_kill); |
Tejun Heo | f47ad45 | 2014-09-24 13:31:49 -0400 | [diff] [blame] | 105 | void percpu_ref_reinit(struct percpu_ref *ref); |
Tejun Heo | dbece3a | 2013-06-13 19:23:53 -0700 | [diff] [blame] | 106 | |
| 107 | /** |
| 108 | * percpu_ref_kill - drop the initial ref |
| 109 | * @ref: percpu_ref to kill |
| 110 | * |
| 111 | * Must be used to drop the initial ref on a percpu refcount; must be called |
| 112 | * precisely once before shutdown. |
| 113 | * |
| 114 | * Puts @ref in non percpu mode, then does a call_rcu() before gathering up the |
| 115 | * percpu counters and dropping the initial ref. |
| 116 | */ |
| 117 | static inline void percpu_ref_kill(struct percpu_ref *ref) |
| 118 | { |
| 119 | return percpu_ref_kill_and_confirm(ref, NULL); |
| 120 | } |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 121 | |
Tejun Heo | eae7975 | 2014-06-28 08:10:13 -0400 | [diff] [blame] | 122 | /* |
| 123 | * Internal helper. Don't use outside percpu-refcount proper. The |
| 124 | * function doesn't return the pointer and let the caller test it for NULL |
| 125 | * because doing so forces the compiler to generate two conditional |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 126 | * branches as it can't assume that @ref->percpu_count is not NULL. |
Tejun Heo | eae7975 | 2014-06-28 08:10:13 -0400 | [diff] [blame] | 127 | */ |
Tejun Heo | 9e804d1 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 128 | static inline bool __ref_is_percpu(struct percpu_ref *ref, |
| 129 | unsigned long __percpu **percpu_countp) |
Tejun Heo | eae7975 | 2014-06-28 08:10:13 -0400 | [diff] [blame] | 130 | { |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 131 | unsigned long percpu_ptr = ACCESS_ONCE(ref->percpu_count_ptr); |
Tejun Heo | eae7975 | 2014-06-28 08:10:13 -0400 | [diff] [blame] | 132 | |
Tejun Heo | 2d72278 | 2014-06-28 08:10:14 -0400 | [diff] [blame] | 133 | /* paired with smp_store_release() in percpu_ref_reinit() */ |
| 134 | smp_read_barrier_depends(); |
| 135 | |
Tejun Heo | 4aab3b5 | 2014-11-22 09:22:42 -0500 | [diff] [blame] | 136 | /* |
| 137 | * Theoretically, the following could test just ATOMIC; however, |
| 138 | * then we'd have to mask off DEAD separately as DEAD may be |
| 139 | * visible without ATOMIC if we race with percpu_ref_kill(). DEAD |
| 140 | * implies ATOMIC anyway. Test them together. |
| 141 | */ |
| 142 | if (unlikely(percpu_ptr & __PERCPU_REF_ATOMIC_DEAD)) |
Tejun Heo | eae7975 | 2014-06-28 08:10:13 -0400 | [diff] [blame] | 143 | return false; |
| 144 | |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 145 | *percpu_countp = (unsigned long __percpu *)percpu_ptr; |
Tejun Heo | eae7975 | 2014-06-28 08:10:13 -0400 | [diff] [blame] | 146 | return true; |
| 147 | } |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 148 | |
| 149 | /** |
| 150 | * percpu_ref_get - increment a percpu refcount |
Tejun Heo | ac89906 | 2013-06-12 20:43:06 -0700 | [diff] [blame] | 151 | * @ref: percpu_ref to get |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 152 | * |
Tejun Heo | 6251f99 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 153 | * Analagous to atomic_long_inc(). |
| 154 | * |
| 155 | * This function is safe to call as long as @ref is between init and exit. |
| 156 | */ |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 157 | static inline void percpu_ref_get(struct percpu_ref *ref) |
| 158 | { |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 159 | unsigned long __percpu *percpu_count; |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 160 | |
Tejun Heo | a424445 | 2013-06-16 16:12:26 -0700 | [diff] [blame] | 161 | rcu_read_lock_sched(); |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 162 | |
Tejun Heo | 9e804d1 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 163 | if (__ref_is_percpu(ref, &percpu_count)) |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 164 | this_cpu_inc(*percpu_count); |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 165 | else |
Tejun Heo | e625305 | 2014-09-20 01:27:25 -0400 | [diff] [blame] | 166 | atomic_long_inc(&ref->count); |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 167 | |
Tejun Heo | a424445 | 2013-06-16 16:12:26 -0700 | [diff] [blame] | 168 | rcu_read_unlock_sched(); |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 169 | } |
| 170 | |
| 171 | /** |
Tejun Heo | 4fb6e25 | 2014-05-09 15:11:53 -0400 | [diff] [blame] | 172 | * percpu_ref_tryget - try to increment a percpu refcount |
| 173 | * @ref: percpu_ref to try-get |
| 174 | * |
| 175 | * Increment a percpu refcount unless its count already reached zero. |
| 176 | * Returns %true on success; %false on failure. |
| 177 | * |
Tejun Heo | 6251f99 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 178 | * This function is safe to call as long as @ref is between init and exit. |
Tejun Heo | 4fb6e25 | 2014-05-09 15:11:53 -0400 | [diff] [blame] | 179 | */ |
| 180 | static inline bool percpu_ref_tryget(struct percpu_ref *ref) |
| 181 | { |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 182 | unsigned long __percpu *percpu_count; |
Tejun Heo | 6251f99 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 183 | int ret; |
Tejun Heo | 4fb6e25 | 2014-05-09 15:11:53 -0400 | [diff] [blame] | 184 | |
| 185 | rcu_read_lock_sched(); |
| 186 | |
Tejun Heo | 9e804d1 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 187 | if (__ref_is_percpu(ref, &percpu_count)) { |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 188 | this_cpu_inc(*percpu_count); |
Tejun Heo | 4fb6e25 | 2014-05-09 15:11:53 -0400 | [diff] [blame] | 189 | ret = true; |
| 190 | } else { |
Tejun Heo | e625305 | 2014-09-20 01:27:25 -0400 | [diff] [blame] | 191 | ret = atomic_long_inc_not_zero(&ref->count); |
Tejun Heo | 4fb6e25 | 2014-05-09 15:11:53 -0400 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | rcu_read_unlock_sched(); |
| 195 | |
| 196 | return ret; |
| 197 | } |
| 198 | |
| 199 | /** |
Tejun Heo | 2070d50 | 2014-05-09 15:11:53 -0400 | [diff] [blame] | 200 | * percpu_ref_tryget_live - try to increment a live percpu refcount |
Tejun Heo | dbece3a | 2013-06-13 19:23:53 -0700 | [diff] [blame] | 201 | * @ref: percpu_ref to try-get |
| 202 | * |
| 203 | * Increment a percpu refcount unless it has already been killed. Returns |
| 204 | * %true on success; %false on failure. |
| 205 | * |
Tejun Heo | 6251f99 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 206 | * Completion of percpu_ref_kill() in itself doesn't guarantee that this |
| 207 | * function will fail. For such guarantee, percpu_ref_kill_and_confirm() |
| 208 | * should be used. After the confirm_kill callback is invoked, it's |
| 209 | * guaranteed that no new reference will be given out by |
| 210 | * percpu_ref_tryget_live(). |
Tejun Heo | 4fb6e25 | 2014-05-09 15:11:53 -0400 | [diff] [blame] | 211 | * |
Tejun Heo | 6251f99 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 212 | * This function is safe to call as long as @ref is between init and exit. |
Tejun Heo | dbece3a | 2013-06-13 19:23:53 -0700 | [diff] [blame] | 213 | */ |
Tejun Heo | 2070d50 | 2014-05-09 15:11:53 -0400 | [diff] [blame] | 214 | static inline bool percpu_ref_tryget_live(struct percpu_ref *ref) |
Tejun Heo | dbece3a | 2013-06-13 19:23:53 -0700 | [diff] [blame] | 215 | { |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 216 | unsigned long __percpu *percpu_count; |
Tejun Heo | dbece3a | 2013-06-13 19:23:53 -0700 | [diff] [blame] | 217 | int ret = false; |
| 218 | |
Tejun Heo | a424445 | 2013-06-16 16:12:26 -0700 | [diff] [blame] | 219 | rcu_read_lock_sched(); |
Tejun Heo | dbece3a | 2013-06-13 19:23:53 -0700 | [diff] [blame] | 220 | |
Tejun Heo | 9e804d1 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 221 | if (__ref_is_percpu(ref, &percpu_count)) { |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 222 | this_cpu_inc(*percpu_count); |
Tejun Heo | dbece3a | 2013-06-13 19:23:53 -0700 | [diff] [blame] | 223 | ret = true; |
Tejun Heo | 490c79a | 2014-09-24 13:31:49 -0400 | [diff] [blame] | 224 | } else if (!(ACCESS_ONCE(ref->percpu_count_ptr) & __PERCPU_REF_DEAD)) { |
| 225 | ret = atomic_long_inc_not_zero(&ref->count); |
Tejun Heo | dbece3a | 2013-06-13 19:23:53 -0700 | [diff] [blame] | 226 | } |
| 227 | |
Tejun Heo | a424445 | 2013-06-16 16:12:26 -0700 | [diff] [blame] | 228 | rcu_read_unlock_sched(); |
Tejun Heo | dbece3a | 2013-06-13 19:23:53 -0700 | [diff] [blame] | 229 | |
| 230 | return ret; |
| 231 | } |
| 232 | |
| 233 | /** |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 234 | * percpu_ref_put - decrement a percpu refcount |
Tejun Heo | ac89906 | 2013-06-12 20:43:06 -0700 | [diff] [blame] | 235 | * @ref: percpu_ref to put |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 236 | * |
| 237 | * Decrement the refcount, and if 0, call the release function (which was passed |
| 238 | * to percpu_ref_init()) |
Tejun Heo | 6251f99 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 239 | * |
| 240 | * This function is safe to call as long as @ref is between init and exit. |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 241 | */ |
| 242 | static inline void percpu_ref_put(struct percpu_ref *ref) |
| 243 | { |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 244 | unsigned long __percpu *percpu_count; |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 245 | |
Tejun Heo | a424445 | 2013-06-16 16:12:26 -0700 | [diff] [blame] | 246 | rcu_read_lock_sched(); |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 247 | |
Tejun Heo | 9e804d1 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 248 | if (__ref_is_percpu(ref, &percpu_count)) |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 249 | this_cpu_dec(*percpu_count); |
Tejun Heo | e625305 | 2014-09-20 01:27:25 -0400 | [diff] [blame] | 250 | else if (unlikely(atomic_long_dec_and_test(&ref->count))) |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 251 | ref->release(ref); |
| 252 | |
Tejun Heo | a424445 | 2013-06-16 16:12:26 -0700 | [diff] [blame] | 253 | rcu_read_unlock_sched(); |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 254 | } |
| 255 | |
Tejun Heo | 2d72278 | 2014-06-28 08:10:14 -0400 | [diff] [blame] | 256 | /** |
| 257 | * percpu_ref_is_zero - test whether a percpu refcount reached zero |
| 258 | * @ref: percpu_ref to test |
| 259 | * |
| 260 | * Returns %true if @ref reached zero. |
Tejun Heo | 6251f99 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 261 | * |
| 262 | * This function is safe to call as long as @ref is between init and exit. |
Tejun Heo | 2d72278 | 2014-06-28 08:10:14 -0400 | [diff] [blame] | 263 | */ |
| 264 | static inline bool percpu_ref_is_zero(struct percpu_ref *ref) |
| 265 | { |
Tejun Heo | eecc16b | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 266 | unsigned long __percpu *percpu_count; |
Tejun Heo | 2d72278 | 2014-06-28 08:10:14 -0400 | [diff] [blame] | 267 | |
Tejun Heo | 9e804d1 | 2014-09-24 13:31:48 -0400 | [diff] [blame] | 268 | if (__ref_is_percpu(ref, &percpu_count)) |
Tejun Heo | 2d72278 | 2014-06-28 08:10:14 -0400 | [diff] [blame] | 269 | return false; |
Tejun Heo | e625305 | 2014-09-20 01:27:25 -0400 | [diff] [blame] | 270 | return !atomic_long_read(&ref->count); |
Tejun Heo | 2d72278 | 2014-06-28 08:10:14 -0400 | [diff] [blame] | 271 | } |
| 272 | |
Kent Overstreet | 215e262 | 2013-05-31 15:26:45 -0700 | [diff] [blame] | 273 | #endif |