Re: [PATCH v2][next] scsi: megaraid_sas: Avoid a couple -Wflex-array-member-not-at-end warnings

["Martin K. Petersen" <martin.petersen@oracle.com>]

Gustavo,

> -Wflex-array-member-not-at-end was introduced in GCC-14, and we are
> getting ready to enable it, globally.
>
> Use the new TRAILING_OVERLAP() helper to fix the following warnings:
>
> drivers/scsi/megaraid/megaraid_sas_fusion.h:1153:31: warning:
> structure containing a flexible array member is not at the end of
> another structure [-Wflex-array-member-not-at-end]
> drivers/scsi/megaraid/megaraid_sas_fusion.h:1198:32: warning:
> structure containing a flexible array member is not at the end of
> another structure [-Wflex-array-member-not-at-end]
>
> This helper creates a union between a flexible-array member (FAM) and
> a set of MEMBERS that would otherwise follow it --in this case `struct
> MR_LD_SPAN_MAP ldSpanMap[MAX_LOGICAL_DRIVES_DYN]` and `struct
> MR_LD_SPAN_MAP ldSpanMap[MAX_LOGICAL_DRIVES]` in the corresponding
> structures.
>
> This overlays the trailing members onto the FAM (struct MR_LD_SPAN_MAP
> ldSpanMap[];) while keeping the FAM and the start of MEMBERS aligned.
>
> The static_assert() ensures this alignment remains, and it's
> intentionally placed inmediately after the corresponding structures
> --no blank line in between.

Applied to 6.19/scsi-staging, thanks!

-- 
Martin K. Petersen