man/io_uring_enter.2: describe timeout updates
@@ -325,7 +325,9 @@ Available since 5.4.
.TP
.B IORING_OP_TIMEOUT_REMOVE
-Attempt to remove an existing timeout operation.
+If
+.I timeout_flags are zero, then it attempts to remove an existing timeout
+operation.
.I addr
must contain the
.I user_data
@@ -341,6 +343,19 @@ value of
.I -ENOENT
Available since 5.5.
+If
+.I timeout_flags
+contain
+.I IORING_TIMEOUT_UPDATE,
+instead of removing an existing operation it updates it.
+.I addr
+and return values are same as before.
+.I addr2
+field must contain a pointer to a struct timespec64 structure.
+.I timeout_flags
+may also contain IORING_TIMEOUT_ABS.
+Available since 5.11.
+
.TP
.B IORING_OP_ACCEPT
Issue the equivalent of an
