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net: netdevice.h: add a description for napi_defer_hard_irqs

Changeset 6f8b12d661d0 ("net: napi: add hard irqs deferral feature")
added a new element at struct net_device.

Add a description for it, based on what's described at the changeset
which added such feature.

Fixes: 6f8b12d661d0 ("net: napi: add hard irqs deferral feature")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/807a3840e7bc1562adefadb0535c9f47e6ab52e0.1592895969.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

authored by

Mauro Carvalho Chehab and committed by
Jonathan Corbet 5c45a918 a8adb51b

+2
+2
include/linux/netdevice.h
··· 1742 1742 * @real_num_rx_queues: Number of RX queues currently active in device 1743 1743 * @xdp_prog: XDP sockets filter program pointer 1744 1744 * @gro_flush_timeout: timeout for GRO layer in NAPI 1745 + * @napi_defer_hard_irqs: If not zero, provides a counter that would 1746 + * allow to avoid NIC hard IRQ, on busy queues. 1745 1747 * 1746 1748 * @rx_handler: handler for received packets 1747 1749 * @rx_handler_data: XXX: need comments on this one