linux-kernel - Re: [PATCH] Staging: ccree: Don't use volatile for monitor

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Message-ID: <20170911160449.GA11886@kroah.com>
Date:   Mon, 11 Sep 2017 09:04:49 -0700
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Srishti Sharma <srishtishar@...il.com>
Cc:     gilad@...yossef.com, linux-crypto@...r.kernel.org,
        driverdev-devel@...uxdriverproject.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, outreachy-kernel@...glegroups.com
Subject: Re: [PATCH] Staging: ccree: Don't use volatile for monitor_lock

On Mon, Sep 11, 2017 at 09:29:31PM +0530, Srishti Sharma wrote:
> The use of volatile for the variable monitor_lock is unnecessary.
> 
> Signed-off-by: Srishti Sharma <srishtishar@...il.com>
> ---
>  drivers/staging/ccree/ssi_request_mgr.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/ccree/ssi_request_mgr.c b/drivers/staging/ccree/ssi_request_mgr.c
> index e5c2f92..7d77941 100644
> --- a/drivers/staging/ccree/ssi_request_mgr.c
> +++ b/drivers/staging/ccree/ssi_request_mgr.c
> @@ -49,7 +49,7 @@ struct ssi_request_mgr_handle {
>  	dma_addr_t dummy_comp_buff_dma;
>  	struct cc_hw_desc monitor_desc;
> 
> -	volatile unsigned long monitor_lock;
> +	unsigned long monitor_lock;

While volatile is not right, odds are, this is still totally wrong as
well.  How about using a "real" lock instead?

thanks,

greg k-h