workqueue: replace WORK_CPU_NONE/LAST with WORK_CPU_END
Now that workqueue has moved away from gcwqs, workqueue no longer has
the need to have a CPU identifier indicating "no cpu associated" - we
now use WORK_OFFQ_POOL_NONE instead - and most uses of WORK_CPU_NONE
are gone.
The only left usage is as the end marker for for_each_*wq*()
iterators, where the name WORK_CPU_NONE is confusing w/o actual
WORK_CPU_NONE usages. Similarly, WORK_CPU_LAST which equals
WORK_CPU_NONE no longer makes sense.
Replace both WORK_CPU_NONE and LAST with WORK_CPU_END. This patch
doesn't introduce any functional difference.
tj: s/WORK_CPU_LAST/WORK_CPU_END/ and rewrote the description.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 577de10..7e11334 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -258,7 +258,7 @@
if (sw & 2)
return WORK_CPU_UNBOUND;
}
- return WORK_CPU_NONE;
+ return WORK_CPU_END;
}
static inline int __next_cwq_cpu(int cpu, const struct cpumask *mask,
@@ -282,17 +282,17 @@
*/
#define for_each_wq_cpu(cpu) \
for ((cpu) = __next_wq_cpu(-1, cpu_possible_mask, 3); \
- (cpu) < WORK_CPU_NONE; \
+ (cpu) < WORK_CPU_END; \
(cpu) = __next_wq_cpu((cpu), cpu_possible_mask, 3))
#define for_each_online_wq_cpu(cpu) \
for ((cpu) = __next_wq_cpu(-1, cpu_online_mask, 3); \
- (cpu) < WORK_CPU_NONE; \
+ (cpu) < WORK_CPU_END; \
(cpu) = __next_wq_cpu((cpu), cpu_online_mask, 3))
#define for_each_cwq_cpu(cpu, wq) \
for ((cpu) = __next_cwq_cpu(-1, cpu_possible_mask, (wq)); \
- (cpu) < WORK_CPU_NONE; \
+ (cpu) < WORK_CPU_END; \
(cpu) = __next_cwq_cpu((cpu), cpu_possible_mask, (wq)))
#ifdef CONFIG_DEBUG_OBJECTS_WORK
@@ -3796,7 +3796,7 @@
/* make sure we have enough bits for OFFQ pool ID */
BUILD_BUG_ON((1LU << (BITS_PER_LONG - WORK_OFFQ_POOL_SHIFT)) <
- WORK_CPU_LAST * NR_STD_WORKER_POOLS);
+ WORK_CPU_END * NR_STD_WORKER_POOLS);
cpu_notifier(workqueue_cpu_up_callback, CPU_PRI_WORKQUEUE_UP);
hotcpu_notifier(workqueue_cpu_down_callback, CPU_PRI_WORKQUEUE_DOWN);