aboutsummaryrefslogtreecommitdiffstats
path: root/net/core
diff options
context:
space:
mode:
authorEric Dumazet <eric.dumazet@gmail.com>2011-07-29 18:37:31 +0000
committerDavid S. Miller <davem@davemloft.net>2011-08-01 18:03:06 -0700
commit22019b17821ab3543090827491e465c5816cbcd6 (patch)
treefc696f2e9bdee7d5630f11ea79f4482cbff346f6 /net/core
parent8fb4e1399137dbbf7f1071bc723b5eff8ad46d1a (diff)
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: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/skbuff.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 2beda824636e..27002dffe7ed 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -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);

Privacy Policy