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skbuff: make __skb_header_pointer()'s data argument const

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The function never modifies the input buffer, so 'data' argument
can be marked as const.
This implies one harmless cast-away.

Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Lobakin 2021-03-14 11:11:14 +00:00 committed by David S. Miller
parent dac06b32c7
commit e3305138da
1 changed files with 3 additions and 3 deletions
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6
include/linux/skbuff.h
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@ -3678,11 +3678,11 @@ __wsum skb_checksum(const struct sk_buff *skb, int offset, int len,
__wsum csum);
static inline void * __must_check
__skb_header_pointer(const struct sk_buff *skb, int offset,
int len, void *data, int hlen, void *buffer)
__skb_header_pointer(const struct sk_buff *skb, int offset, int len,
const void *data, int hlen, void *buffer)
{
if (hlen - offset >= len)
return data + offset;
return (void *)data + offset;
if (!skb ||
skb_copy_bits(skb, offset, buffer, len) < 0)