Re: strange loop!!

[joan@laigu.net]

Hi,
 is answered in the FAQ. http://www.kernelnewbies.org/faq/ 

Joan 

Mandeep Singh Sandhu writes: 

> Hi all,
> i found this bit of code somewhere in the kernel.
> cud NE one explain why the do...while is required??? 
>
> do
> {
>   ....(some statements)
>   ....
>   ....
> } while(0); 
>
> this will execute only once, so why the do....while at all??? 
>
> TIA
> mandeep 
>
>
> -----Original Message-----
> From: Kiran Kumar [mailto:immidi_kiran@yahoo.com]
> Sent: Monday, January 19, 2004 3:30 PM
> To: kernelnewbies@nl.linux.org
> Subject: skbuff query 
>
>
> Hi,
>   Can some one clarify why this code piece
> (alloc_skb() skbuff.c) has ++count < 5? Should it not
> be greater than, if it intends to tolerate the
> condition 5 times. 
>
> if (in_interrupt() && (gfp_mask & __GFP_WAIT)) {
>       static int count = 0;
>       if (++count < 5) {
>       printk(KERN_ERR "alloc_skb called nonatomically
> "
>               "from interrupt %p\n",
> NET_CALLER(size));
>                 BUG();
>       }
>                 gfp_mask &= ~__GFP_WAIT;
> } 
>
> =====
> Regards,
> Kiran Kumar Immidi 
>
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