Re: [PATCH -next 1/1] net: skbuff: fix compile error in skb_panic()

2 messages, 2 authors, 2013-02-13 · open the first message on its own page

Re: [PATCH -next 1/1] net: skbuff: fix compile error in skb_panic()

From: Sedat Dilek <hidden>
Date: 2013-02-13 12:41:30

On Wed, Feb 13, 2013 at 12:20 PM, James Hogan [off-list ref] 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 -

quoted hunk
This is fixed by renaming the argument to msg.

Signed-off-by: James Hogan <redacted>
Cc: Jean Sacren <redacted>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: David S. Miller <davem@davemloft.net>
---

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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Re: [PATCH -next 1/1] net: skbuff: fix compile error in skb_panic()

From: David Miller <davem@davemloft.net>
Date: 2013-02-13 16:52:28

From: Sedat Dilek <redacted>
Date: Wed, 13 Feb 2013 13:41:21 +0100
On Wed, Feb 13, 2013 at 12:20 PM, James Hogan [off-list ref] wrote:
quoted
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?
Kconfig option specific.

Applied, thanks James.
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