diff options
Diffstat (limited to 'include/linux/workqueue.h')
| -rw-r--r-- | include/linux/workqueue.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h index ff68b1d95b41..f8b35763e55f 100644 --- a/include/linux/workqueue.h +++ b/include/linux/workqueue.h @@ -73,13 +73,21 @@ enum { WORK_OFFQ_CANCELING = (1 << WORK_OFFQ_FLAG_BASE), + /* + * When a work item is off queue, its high bits point to the last + * cpu it was on. Cap at 31 bits and use the highest number to + * indicate that no cpu is associated. + */ WORK_OFFQ_FLAG_BITS = 1, WORK_OFFQ_CPU_SHIFT = WORK_OFFQ_FLAG_BASE + WORK_OFFQ_FLAG_BITS, + WORK_OFFQ_LEFT = BITS_PER_LONG - WORK_OFFQ_CPU_SHIFT, + WORK_OFFQ_CPU_BITS = WORK_OFFQ_LEFT <= 31 ? WORK_OFFQ_LEFT : 31, + WORK_OFFQ_CPU_NONE = (1LU << WORK_OFFQ_CPU_BITS) - 1, /* convenience constants */ WORK_STRUCT_FLAG_MASK = (1UL << WORK_STRUCT_FLAG_BITS) - 1, WORK_STRUCT_WQ_DATA_MASK = ~WORK_STRUCT_FLAG_MASK, - WORK_STRUCT_NO_CPU = (unsigned long)WORK_CPU_NONE << WORK_OFFQ_CPU_SHIFT, + WORK_STRUCT_NO_CPU = (unsigned long)WORK_OFFQ_CPU_NONE << WORK_OFFQ_CPU_SHIFT, /* bit mask for work_busy() return values */ WORK_BUSY_PENDING = 1 << 0, |