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net: fix comment above build_skb()

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build_skb() specifies that the data parameter must come from a kmalloc'd
area, this is only true if frag_size equals 0, because then build_skb()
will use kzsize(data) to figure out the actual data size. Update the
comment to reflect that special condition.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2013-07-23 20:22:39 +01:00 committed by David S. Miller
parent 2bf420a768
commit deceb4c062
1 changed files with 2 additions and 1 deletions
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3
net/core/skbuff.c
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@ -309,7 +309,8 @@ EXPORT_SYMBOL(__alloc_skb);
* @frag_size: size of fragment, or 0 if head was kmalloced
*
* Allocate a new &sk_buff. Caller provides space holding head and
* skb_shared_info. @data must have been allocated by kmalloc()
* skb_shared_info. @data must have been allocated by kmalloc() only if
* @frag_size is 0, otherwise data should come from the page allocator.
* The return is the new skb buffer.
* On a failure the return is %NULL, and @data is not freed.
* Notes :