On Wed, Feb 13, 2013 at 12:20 PM, James Hogan <james.hogan@xxxxxxxxxx> wrote:
> I get the following build error on next-20130213 due to the following
> commit:
>
> commit f05de73bf82fbbc00265c06d12efb7273f7dc54a ("skbuff: create
> skb_panic() function and its wrappers").
>
> It adds an argument called panic to a function that uses the BUG() macro
> which tries to call panic, but the argument masks the panic() function
> declaration, resulting in the following error (gcc 4.2.4):
>
> net/core/skbuff.c In function 'skb_panic':
> net/core/skbuff.c +126 : error: called object 'panic' is not a function
>
[ CC linux-netdev ]
Hmm, with gcc-4.6.3 on Ubuntu/precise I don't see this... compiler-specific?
$ grep skbuff build-log_3.8.0-rc7-next20130213-2-iniza-small.txt
CC net/core/skbuff.o
- Sedat -
> This is fixed by renaming the argument to msg.
>
> Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
> Cc: Jean Sacren <sakiwit@xxxxxxxxx>
> Cc: Jiri Pirko <jiri@xxxxxxxxxxx>
> Cc: David S. Miller <davem@xxxxxxxxxxxxx>
> ---
>
> Feel free to rename panic to something else or squash this into the
> offending commit.
>
> net/core/skbuff.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/net/core/skbuff.c b/net/core/skbuff.c
> index 8731c39..21a22cc 100644
> --- a/net/core/skbuff.c
> +++ b/net/core/skbuff.c
> @@ -109,7 +109,7 @@ static const struct pipe_buf_operations sock_pipe_buf_ops = {
> * @skb: buffer
> * @sz: size
> * @addr: address
> - * @panic: skb_over_panic or skb_under_panic
> + * @msg: skb_over_panic or skb_under_panic
> *
> * Out-of-line support for skb_put() and skb_push().
> * Called via the wrapper skb_over_panic() or skb_under_panic().
> @@ -117,10 +117,10 @@ static const struct pipe_buf_operations sock_pipe_buf_ops = {
> * __builtin_return_address is not used because it is not always reliable.
> */
> static void skb_panic(struct sk_buff *skb, unsigned int sz, void *addr,
> - const char panic[])
> + const char msg[])
> {
> pr_emerg("%s: text:%p len:%d put:%d head:%p data:%p tail:%#lx end:%#lx dev:%s\n",
> - panic, addr, skb->len, sz, skb->head, skb->data,
> + msg, addr, skb->len, sz, skb->head, skb->data,
> (unsigned long)skb->tail, (unsigned long)skb->end,
> skb->dev ? skb->dev->name : "<NULL>");
> BUG();
> --
> 1.8.1.2
>
>
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