linux-kernel - Re: [PATCH AUTOSEL 4.9 09/10] staging: octeon: Fix return type of cvm_oct_xmit and cvm_oct_xmit

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Date:   Thu, 13 Oct 2022 07:53:38 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Nathan Huckleberry <nhuck@...gle.com>, llvm@...ts.linux.dev,
        Dan Carpenter <error27@...il.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, ndesaulniers@...gle.com,
        linux-staging@...ts.linux.dev
Subject: Re: [PATCH AUTOSEL 4.9 09/10] staging: octeon: Fix return type of
 cvm_oct_xmit and cvm_oct_xmit_pow

On Wed, Oct 12, 2022 at 08:27:56PM -0400, Sasha Levin wrote:
> From: Nathan Huckleberry <nhuck@...gle.com>
> 
> [ Upstream commit b77599043f00fce9253d0f22522c5d5b521555ce ]
> 
> The ndo_start_xmit field in net_device_ops is expected to be of type
> netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev).
> 
> The mismatched return type breaks forward edge kCFI since the underlying
> function definition does not match the function hook definition.

kCFI showed up in 6.1, so this is not needed in any stable branches,
please drop it from all.

thanks,

greg k-h