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From: "Florian Fainelli" <>
	"Florian Fainelli" <>
Subject: [PATCH v2] net: fix comment above build_skb()
Date: Tue, 23 Jul 2013 20:22:39 +0100	[thread overview]
Message-ID: <> (raw)

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 <>
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 :

             reply	other threads:[~2013-07-23 19:23 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-23 19:22 Florian Fainelli [this message]
2013-07-25  0:59 ` David Miller

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