Re: [PATCH] net/qrtr: replaced useless kzalloc with kmalloc in qrtr_tun_write_iter()

[Jakub Kicinski]

On Thu,  4 Feb 2021 15:02:30 +0600 Sabyrzhan Tasbolatov wrote:
> Replaced kzalloc() with kmalloc(), there is no need for zeroed-out
> memory for simple void *kbuf.

There is no need for zeroed-out memory because it's immediately
overwritten by copy_from_iter...

> >For potential, separate clean up - this is followed 
> >by copy_from_iter_full(len) kzalloc() can probably 
> >be replaced by kmalloc()?
> >  
> >>  	if (!kbuf)
> >>  		return -ENOMEM;  
> 
> Signed-off-by: Sabyrzhan Tasbolatov <snovitoll@xxxxxxxxx>
> ---
>  net/qrtr/tun.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/qrtr/tun.c b/net/qrtr/tun.c
> index b238c40a9984..9b607c7614de 100644
> --- a/net/qrtr/tun.c
> +++ b/net/qrtr/tun.c
> @@ -86,7 +86,7 @@ static ssize_t qrtr_tun_write_iter(struct kiocb *iocb, struct iov_iter *from)
>  	if (len > KMALLOC_MAX_SIZE)
>  		return -ENOMEM;
>  
> -	kbuf = kzalloc(len, GFP_KERNEL);
> +	kbuf = kmalloc(len, GFP_KERNEL);
>  	if (!kbuf)
>  		return -ENOMEM;
>