diff options
| author | Harshitha Ramamurthy <harshitha.ramamurthy@intel.com> | 2018-01-23 19:51:03 +0300 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2018-02-14 20:43:22 +0300 |
| commit | 0718e560a330599d15fddc37651d693c7a09e49e (patch) | |
| tree | 7479205c930d75a9ba84a70f5ba7201a8788abd3 /include/linux/avf | |
| parent | 0c483bd4b82619397e7f655eea1ba3ba9d9a15a2 (diff) | |
| download | linux-0718e560a330599d15fddc37651d693c7a09e49e.tar.xz | |
virtchnl: Add a macro to check the size of a union
This patch adds a macro to check if the size of a union is correct.
It throws a divide by zero error if the union is not of the correct
size.
Signed-off-by: Harshitha Ramamurthy <harshitha.ramamurthy@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'include/linux/avf')
| -rw-r--r-- | include/linux/avf/virtchnl.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/linux/avf/virtchnl.h b/include/linux/avf/virtchnl.h index 1f652ceecf35..6fe630ebbf23 100644 --- a/include/linux/avf/virtchnl.h +++ b/include/linux/avf/virtchnl.h @@ -140,13 +140,15 @@ enum virtchnl_ops { VIRTCHNL_OP_DISABLE_CHANNELS = 31, }; -/* This macro is used to generate a compilation error if a structure +/* These macros are used to generate compilation errors if a structure/union * is not exactly the correct length. It gives a divide by zero error if the - * structure is not of the correct size, otherwise it creates an enum that is - * never used. + * structure/union is not of the correct size, otherwise it creates an enum + * that is never used. */ #define VIRTCHNL_CHECK_STRUCT_LEN(n, X) enum virtchnl_static_assert_enum_##X \ { virtchnl_static_assert_##X = (n)/((sizeof(struct X) == (n)) ? 1 : 0) } +#define VIRTCHNL_CHECK_UNION_LEN(n, X) enum virtchnl_static_asset_enum_##X \ + { virtchnl_static_assert_##X = (n)/((sizeof(union X) == (n)) ? 1 : 0) } /* Virtual channel message descriptor. This overlays the admin queue * descriptor. All other data is passed in external buffers. |