[LTP] [PATCH v3 2/7] API: Add macro for the container_of trick

[Li Wang]

Richard Palethorpe <rpalethorpe@suse.com> wrote:

Signed-off-by: Richard Palethorpe <rpalethorpe@suse.com>
>
Reviewed-by: Li Wang <liwang@redhat.com>


> ---
>  include/tst_common.h | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/include/tst_common.h b/include/tst_common.h
> index fd7a900d4..317925d1d 100644
> --- a/include/tst_common.h
> +++ b/include/tst_common.h
> @@ -83,4 +83,9 @@
>  #define TST_RES_SUPPORTS_TCONF_TFAIL_TINFO_TPASS_TWARN(condition) \
>         TST_BUILD_BUG_ON(condition)
>
> +#define tst_container_of(ptr, type, member) ({              \
> +       const typeof( ((type *)0)->member ) *__mptr = (ptr); \
> +       (type *)( (char *)__mptr - offsetof(type,member) );  \
> +})
>

I'd suggest defining it as uppercase 'TST_CONTAINER_OF(...)' to respect
other macro's naming policy in tst_common.h.

-- 
Regards,
Li Wang
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