netdev - [PATCH v2] net: fix comment above build

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Message-ID: <1374607359-20024-1-git-send-email-f.fainelli@gmail.com>
Date:	Tue, 23 Jul 2013 20:22:39 +0100
From:	"Florian Fainelli" <f.fainelli@...il.com>
To:	davem@...emloft.net
cc:	netdev@...r.kernel.org, eric.dumazet@...il.com,
	bhutchings@...arflare.com,
	"Florian Fainelli" <f.fainelli@...il.com>
Subject: [PATCH v2] 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@...il.com>
---
Changes since v1:
- explain the case where frag_size != 0

 net/core/skbuff.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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 :
-- 
1.8.1.2


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