Re: [linux-next:master 5069/12910] include/linux/build_bug.h:78:41: error: static assertion failed: "sizeof(struct utp_upiu_header) == 12"

[Bart Van Assche <bvanassche@acm.org>]

On 8/25/23 02:07, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   6269320850097903b30be8f07a5c61d9f7592393
> commit: 617bfaa8dd50d6a3ffc8694b4696bf2aa196bd44 [5069/12910] scsi: ufs: Simplify response header parsing
> config: arm-randconfig-r001-20230825 (https://download.01.org/0day-ci/archive/20230825/202308251634.tuRn4OVv-lkp@intel.com/config)
> compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
> reproduce: (https://download.01.org/0day-ci/archive/20230825/202308251634.tuRn4OVv-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202308251634.tuRn4OVv-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>     In file included from include/linux/container_of.h:5,
>                      from include/linux/list.h:5,
>                      from include/linux/async.h:12,
>                      from drivers/ufs/core/ufshcd.c:12:
>>> include/linux/build_bug.h:78:41: error: static assertion failed: "sizeof(struct utp_upiu_header) == 12"
>        78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
>           |                                         ^~~~~~~~~~~~~~
>     include/linux/build_bug.h:77:34: note: in expansion of macro '__static_assert'
>        77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
>           |                                  ^~~~~~~~~~~~~~~
>     include/ufs/ufs.h:22:1: note: in expansion of macro 'static_assert'
>        22 | static_assert(sizeof(struct utp_upiu_header) == 12);
>           | ^~~~~~~~~~~~~

Can anyone tell me where to find the gcc binaries used by the kernel 
test robot? I cannot reproduce the above build error with
arm-linux-gnueabi-gcc 13.2.0 from godbolt.org.

This is the code that I provided as input to godbolt.org:

#include <stdint.h>

#define __LITTLE_ENDIAN 1

typedef uint32_t __be32;
typedef uint16_t __be16;
typedef uint8_t __u8;

struct utp_upiu_header {
	union {
		struct {
			__be32 dword_0;
			__be32 dword_1;
			__be32 dword_2;
		};
		struct {
			__u8 transaction_code;
			__u8 flags;
			__u8 lun;
			__u8 task_tag;
#if defined(__BIG_ENDIAN)
			__u8 iid: 4;
			__u8 command_set_type: 4;
#elif defined(__LITTLE_ENDIAN)
			__u8 command_set_type: 4;
			__u8 iid: 4;
#else
#error
#endif
			union {
				__u8 tm_function;
				__u8 query_function;
			};
			__u8 response;
			__u8 status;
			__u8 ehs_length;
			__u8 device_information;
			__be16 data_segment_length;
		};
	};
};

static_assert(sizeof(struct utp_upiu_header) == 12, "");

Thanks,

Bart.