blk-wbt: doc: Update the doc of the wbt_lat_usec interface

The symbol wb_window_usec cannot be found. Update the doc to reflect the
latest implementation, in other words, the debugfs interface
'curr_win_nsec'.

Signed-off-by: Tang Yizhou <yizhou.tang@shopee.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20250727173959.160835-4-yizhou.tang@shopee.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/stable/sysfs-block
index 803f578dc023ad62e8db0ccbe4d2cb2699626c68..0ddffc9133d04d65c30dd62ba5c6535a1a3779f6 100644 (file)
--- a/Documentation/ABI/stable/sysfs-block
+++ b/Documentation/ABI/stable/sysfs-block
@@ -731,7 +731,7 @@ Contact:    linux-block@vger.kernel.org
 Description:
                [RW] If the device is registered for writeback throttling, then
                this file shows the target minimum read latency. If this latency
-               is exceeded in a given window of time (see wb_window_usec), then
+               is exceeded in a given window of time (see curr_win_nsec), then
                the writeback throttling will start scaling back writes. Writing
                a value of '0' to this file disables the feature. Writing a
                value of '-1' to this file resets the value to the default