linux-kernel - Re: [PATCH] Drivers:staging:ozwpan Fixed sparse context imbalance warning

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Date:	Fri, 28 Feb 2014 09:05:55 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Surendra Patil <surendra.tux@...il.com>
Cc:	rupesh.gujare@...el.com, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Drivers:staging:ozwpan Fixed sparse context imbalance
 warning

On Fri, Feb 28, 2014 at 08:57:02AM -0800, Surendra Patil wrote:
> Sparse warns about -
> drivers/staging/ozwpan/ozproto.c:797:6: warning: context imbalance in 'oz_polling_lock_bh' - wrong count at exit
> drivers/staging/ozwpan/ozproto.c:802:6: warning: context imbalance in 'oz_polling_unlock_bh' - unexpected unlock
> so added __acquires() and __releases().
> 
> Signed-off-by: Surendra Patil <surendra.tux@...il.com>
> ---
>  drivers/staging/ozwpan/ozproto.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/staging/ozwpan/ozproto.c b/drivers/staging/ozwpan/ozproto.c
> index e7138ed..b47cec1 100644
> --- a/drivers/staging/ozwpan/ozproto.c
> +++ b/drivers/staging/ozwpan/ozproto.c
> @@ -795,11 +795,13 @@ int oz_get_pd_list(struct oz_mac_addr *addr, int max_count)
>  }
>  
>  void oz_polling_lock_bh(void)
> +__acquires(&g_polling_block)
>  {
>  	spin_lock_bh(&g_polling_lock);
>  }
>  
>  void oz_polling_unlock_bh(void)
> +__releases(&g_polling_block)
>  {
>  	spin_unlock_bh(&g_polling_lock);
>  }

How about ripping out this "wrapper" function entirely and replacing all
calls to them with the "real" call to the spinlock function?

thanks,

greg k-h
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