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Commit 22019b17 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

net: add kerneldoc to skb_copy_bits() 



Since skb_copy_bits() is called from assembly, add a fat comment to make
clear we should think twice before changing its prototype.

Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8fb4e139

net/core/skbuff.c

+15 −2
Original line number Diff line number Diff line
@@ -1369,8 +1369,21 @@ pull_pages: 
}

EXPORT_SYMBOL(__pskb_pull_tail);



/* Copy some data bits from skb to kernel buffer. */



/**

 *	skb_copy_bits - copy bits from skb to kernel buffer

 *	@skb: source skb

 *	@offset: offset in source

 *	@to: destination buffer

 *	@len: number of bytes to copy

 *

 *	Copy the specified number of bytes from the source skb to the

 *	destination buffer.

 *

 *	CAUTION ! :

 *		If its prototype is ever changed,

 *		check arch/{*}/net/{*}.S files,

 *		since it is called from BPF assembly code.

 */

int skb_copy_bits(const struct sk_buff *skb, int offset, void *to, int len)

{

	int start = skb_headlen(skb);