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-rw-r--r--Documentation/ABI/testing/sysfs-devices-state_synced5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-state_synced b/Documentation/ABI/testing/sysfs-devices-state_synced
index 0c922d7d02fc..c64636ddac41 100644
--- a/Documentation/ABI/testing/sysfs-devices-state_synced
+++ b/Documentation/ABI/testing/sysfs-devices-state_synced
@@ -21,4 +21,9 @@ Description:
at the time the kernel starts are not affected or limited in
any way by sync_state() callbacks.
+ Writing "1" to this file will force a call to the device's
+ sync_state() function if it hasn't been called already. The
+ sync_state() call happens independent of the state of the
+ consumer devices.
+