Commit 066768b7 authored Jun 18, 2023 by Christophe JAILLET Committed by Jakub Kicinski Jun 20, 2023

mctp: Reorder fields in 'struct mctp_route'



Group some variables based on their sizes to reduce hole and avoid padding.
On x86_64, this shrinks the size of 'struct mctp_route'
from 72 to 64 bytes.

It saves a few bytes of memory and is more cache-line friendly.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Acked-by: Jeremy Kerr <jk@codeconstruct.com.au>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/393ad1a5aef0aa28d839eeb3d7477da0e0eeb0b0.1687080803.git.christophe.jaillet@wanadoo.fr


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

parent 857922b1

include/net/mctp.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -234,9 +234,9 @@ struct mctp_flow {
		struct mctp_route {
		mctp_eid_t min, max;

		struct mctp_dev *dev;
		unsigned int mtu;
		unsigned char type;
		unsigned int mtu;
		struct mctp_dev *dev;
		int (output)(struct mctp_route route,
		struct sk_buff *skb);