[PATCH 2/2] netfilter: add missing macro

[PATCH 2/2] netfilter: add missing macro

[Eric Engestrom]

Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
---

This can't compile without this macro… Is this header really used by anyone?
Should it be removed, to avoid bit-rot?

---
 include/uapi/linux/netfilter/xt_sctp.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/uapi/linux/netfilter/xt_sctp.h b/include/uapi/linux/netfilter/xt_sctp.h
index 58ffcfb..e4410db 100644
--- a/include/uapi/linux/netfilter/xt_sctp.h
+++ b/include/uapi/linux/netfilter/xt_sctp.h
@@ -3,6 +3,8 @@
 
 #include <linux/types.h>
 
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr)[0])
+
 #define XT_SCTP_SRC_PORTS	        0x01
 #define XT_SCTP_DEST_PORTS	        0x02
 #define XT_SCTP_CHUNK_TYPES		0x04
-- 
2.9.0

Re: [PATCH 2/2] netfilter: add missing macro

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 1946 bytes --]

Hi,

[auto build test WARNING on linux-nvdimm/libnvdimm-for-next]
[also build test WARNING on v4.7-rc6 next-20160708]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Eric-Engestrom/libnvdimm-add-missing-macros/20160709-003310
base:   https://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git libnvdimm-for-next
config: m68k-sun3_defconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 4.9.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=m68k 

All warnings (new ones prefixed by >>):

   In file included from net/netfilter/xt_sctp.c:10:0:
>> include/uapi/linux/netfilter/xt_sctp.h:6:0: warning: "ARRAY_SIZE" redefined
    #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr)[0])
    ^
   In file included from include/linux/list.h:8:0,
                    from include/linux/module.h:9,
                    from net/netfilter/xt_sctp.c:2:
   include/linux/kernel.h:54:0: note: this is the location of the previous definition
    #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
    ^

vim +/ARRAY_SIZE +6 include/uapi/linux/netfilter/xt_sctp.h

     1	#ifndef _XT_SCTP_H_
     2	#define _XT_SCTP_H_
     3	
     4	#include <linux/types.h>
     5	
   > 6	#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr)[0])
     7	
     8	#define XT_SCTP_SRC_PORTS	        0x01
     9	#define XT_SCTP_DEST_PORTS	        0x02
    10	#define XT_SCTP_CHUNK_TYPES		0x04
    11	
    12	#define XT_SCTP_VALID_FLAGS		0x07
    13	
    14	struct xt_sctp_flag_info {

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/octet-stream, Size: 11731 bytes --]

Re: [PATCH 2/2] netfilter: add missing macro

[Pablo Neira Ayuso]

On Fri, Jul 08, 2016 at 05:29:11PM +0100, Eric Engestrom wrote:
> Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
> ---
> 
> This can't compile without this macro… Is this header really used by anyone?
> Should it be removed, to avoid bit-rot?

Probably better to define something like:

#define SCTP_BITMAP_LEN         (256 / sizeof (u_int32_t))

and use it consistently all around the code, so we can get rid of
these ARRAY_SIZE() from the uapi header.

> ---
>  include/uapi/linux/netfilter/xt_sctp.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/include/uapi/linux/netfilter/xt_sctp.h b/include/uapi/linux/netfilter/xt_sctp.h
> index 58ffcfb..e4410db 100644
> --- a/include/uapi/linux/netfilter/xt_sctp.h
> +++ b/include/uapi/linux/netfilter/xt_sctp.h
> @@ -3,6 +3,8 @@
>  
>  #include <linux/types.h>
>  
> +#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr)[0])
> +
>  #define XT_SCTP_SRC_PORTS	        0x01
>  #define XT_SCTP_DEST_PORTS	        0x02
>  #define XT_SCTP_CHUNK_TYPES		0x04
> -- 
> 2.9.0
> 
--
To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html