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| author | Gustavo A. R. Silva <gustavoars@kernel.org> | 2025-12-12 15:44:50 +0900 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2025-12-18 19:42:01 +0000 |
| commit | 52f758edc9f9f0b1f4f83eb668a5f76482ce00ca (patch) | |
| tree | 2f8b8743f73d652b1bed549924c09ef529f3ad03 /include | |
| parent | 92c172ae16a2718aba0d8fec5a62fc1b8aa452dc (diff) | |
hyperv: Avoid -Wflex-array-member-not-at-end warning
-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 warning:
include/hyperv/hvgdk_mini.h:581:25: 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.
This overlays the trailing MEMBER u64 gva_list[]; onto the FAM
struct hv_tlb_flush_ex::hv_vp_set.bank_contents[], while keeping
the FAM and the start of MEMBER aligned.
The static_assert() ensures this alignment remains, and it's
intentionally placed inmediately after the related structure --no
blank line in between.
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hyperv/hvgdk_mini.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/hyperv/hvgdk_mini.h b/include/hyperv/hvgdk_mini.h index 04b18d0e37af..30fbbde81c5c 100644 --- a/include/hyperv/hvgdk_mini.h +++ b/include/hyperv/hvgdk_mini.h @@ -578,9 +578,12 @@ struct hv_tlb_flush { /* HV_INPUT_FLUSH_VIRTUAL_ADDRESS_LIST */ struct hv_tlb_flush_ex { u64 address_space; u64 flags; - struct hv_vpset hv_vp_set; - u64 gva_list[]; + __TRAILING_OVERLAP(struct hv_vpset, hv_vp_set, bank_contents, __packed, + u64 gva_list[]; + ); } __packed; +static_assert(offsetof(struct hv_tlb_flush_ex, hv_vp_set.bank_contents) == + offsetof(struct hv_tlb_flush_ex, gva_list)); struct ms_hyperv_tsc_page { /* HV_REFERENCE_TSC_PAGE */ volatile u32 tsc_sequence; |