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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-07-29 18:37:31 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-08-01 18:03:06 -0700 |
| commit | 22019b17821ab3543090827491e465c5816cbcd6 (patch) | |
| tree | fc696f2e9bdee7d5630f11ea79f4482cbff346f6 | |
| parent | 8fb4e1399137dbbf7f1071bc723b5eff8ad46d1a (diff) | |
| download | linux-22019b17821ab3543090827491e465c5816cbcd6.tar.bz2 | |
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>
| -rw-r--r-- | net/core/skbuff.c | 17 |
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); |