netdev - Re: [PATCH net-next 4/8] libceph: use min() to simplify the code

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Message-ID: <20240824181209.GR2164@kernel.org>
Date: Sat, 24 Aug 2024 19:12:09 +0100
From: Simon Horman <horms@...nel.org>
To: Li Zetao <lizetao1@...wei.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, marcel@...tmann.org, johan.hedberg@...il.com,
	luiz.dentz@...il.com, idryomov@...il.com, xiubli@...hat.com,
	dsahern@...nel.org, trondmy@...nel.org, anna@...nel.org,
	chuck.lever@...cle.com, jlayton@...nel.org, neilb@...e.de,
	okorniev@...hat.com, Dai.Ngo@...cle.com, tom@...pey.com,
	jmaloy@...hat.com, ying.xue@...driver.com, linux@...blig.org,
	jacob.e.keller@...el.com, willemb@...gle.com, kuniyu@...zon.com,
	wuyun.abel@...edance.com, quic_abchauha@...cinc.com,
	gouhao@...ontech.com, netdev@...r.kernel.org,
	linux-bluetooth@...r.kernel.org, ceph-devel@...r.kernel.org,
	linux-nfs@...r.kernel.org, tipc-discussion@...ts.sourceforge.net
Subject: Re: [PATCH net-next 4/8] libceph: use min() to simplify the code

On Thu, Aug 22, 2024 at 09:39:04PM +0800, Li Zetao wrote:
> When resolving name in ceph_dns_resolve_name(), the end address of name
> is determined by the minimum value of delim_p and colon_p. So using min()
> here is more in line with the context.
> 
> Signed-off-by: Li Zetao <lizetao1@...wei.com>
> ---
>  net/ceph/messenger.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
> index 3c8b78d9c4d1..d1b5705dc0c6 100644
> --- a/net/ceph/messenger.c
> +++ b/net/ceph/messenger.c
> @@ -1254,7 +1254,7 @@ static int ceph_dns_resolve_name(const char *name, size_t namelen,
>  	colon_p = memchr(name, ':', namelen);
>  
>  	if (delim_p && colon_p)
> -		end = delim_p < colon_p ? delim_p : colon_p;
> +		end = min(delim_p, colon_p);

Both delim_p, and colon_p are char *, so this seems correct to me.

And the code being replaced does appear to be a min() operation in
both form and function.

Reviewed-by: Simon Horman <horms@...nel.org>

However, I don't believe libceph changes usually don't go through next-next.
So I think this either needs to be reposted or get some acks from
one of the maintainers.

Ilya, Xiubo, perhaps you can offer some guidance here?

>  	else if (!delim_p && colon_p)
>  		end = colon_p;
>  	else {
> -- 
> 2.34.1
> 
>