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Date:   Fri, 06 Dec 2019 12:06:59 -0800 (PST)
From:   David Miller <>
Subject: Re: [PATCH net] net: avoid an indirect call in ____sys_recvmsg()

From: Eric Dumazet <>
Date: Fri,  6 Dec 2019 09:38:36 -0800

> CONFIG_RETPOLINE=y made indirect calls expensive.
> gcc seems to add an indirect call in ____sys_recvmsg().
> Rewriting the code slightly makes sure to avoid this indirection.
> Alternative would be to not call sock_recvmsg() and instead
> use security_socket_recvmsg() and sock_recvmsg_nosec(),
> but this is less readable IMO.
> Signed-off-by: Eric Dumazet <>

Applied, thanks Eric.

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