Defined in 4 files as a prototype:

• Documentation/ABI/testing/sysfs-class-power-surface, line 284 (as a prototype)
• Documentation/ABI/testing/sysfs-driver-jz4780-efuse, line 301 (as a prototype)
• Documentation/RCU/Design/Data-Structures/blkd_task.svg, line 154 (as a prototype)
• Documentation/admin-guide/device-mapper/statistics.rst, line 158 (as a prototype)

Referenced in 3 files:

• fs/nfs/nfs4state.c
  • line 1213
  • line 1218
  • line 1220
  • line 1245
• kernel/sys_ni.c, line 283
• mm/swapfile.c, line 2995