[PATCH 4.12 181/196] writeback: rework wb_[dec|inc]_stat family of functions

4.12-stable review patch. If anyone has any objections, please let me know. -- From: Nikolay Borisov commit 3e8f399da490e6ac20a3cfd6aa404c9aa961a9a2 upstream. Currently the writeback statistics code uses a percpu counters to hold various statistics.

[PATCH 4.12 181/196] writeback: rework wb_[dec|inc]_stat family of functions

4.12-stable review patch. If anyone has any objections, please let me know. -- From: Nikolay Borisov commit 3e8f399da490e6ac20a3cfd6aa404c9aa961a9a2 upstream. Currently the writeback statistics code uses a percpu counters to hold various statistics. Furthermore we have 2