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authorFlorian Fainelli <f.fainelli@gmail.com>2013-07-23 20:22:39 +0100
committerDavid S. Miller <davem@davemloft.net>2013-07-24 17:59:07 -0700
commitdeceb4c062a8dd63fe554c3be2b4bf9151a5cedf (patch)
tree1baebeda655b4bcfcb36f9da9c038932f84b7404 /net
parent2bf420a7686e0fdd2fbf16d75e729b306744db0d (diff)
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net: fix comment above build_skb()
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>
Diffstat (limited to 'net')
-rw-r--r--net/core/skbuff.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 20e02d2..3df4d4c 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -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 :
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