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BUG: KCSAN: data-race in fprop_new_period / fprop_reflect_period_percpu

read-write to 0xffffffff86e480c0 of 4 bytes by interrupt on cpu 1:
 fprop_new_period+0xaa/0xe0
 writeout_period+0x59/0xe0
 call_timer_fn+0x35/0x290
 __run_timers+0x46c/0x650
 run_timer_softirq+0x5a/0x60
 __do_softirq+0xe4/0x2b0
 run_ksoftirqd+0x23/0x30
 smpboot_thread_fn+0x2f8/0x490
 kthread+0x1ac/0x1e0
 ret_from_fork+0x1f/0x30

read to 0xffffffff86e480c0 of 4 bytes by task 3150 on cpu 0:
 fprop_reflect_period_percpu+0x22/0x1a0
 __fprop_add_percpu_max+0x58/0x180
 __wb_writeout_add+0x7e/0x1d0
 __folio_end_writeback+0x26f/0x500
 folio_end_writeback+0x5b/0x150
 end_page_writeback+0x44/0xf0
 ext4_finish_bio+0x3d8/0x4d0
 ext4_release_io_end+0x8c/0x1e0
 ext4_end_io_rsv_work+0x2d3/0x360
 process_one_work+0x3e6/0x750
 worker_thread+0x5ef/0xa10
 kthread+0x1ac/0x1e0
 ret_from_fork+0x1f/0x30

value changed: 0x00000113 -> 0x00000114

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3150 Comm: kworker/u4:5 Not tainted 6.2.0-rc7-syzkaller-00002-gd2d11f342b17-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work
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