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nfp: Use static_assert() to check struct sizes

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Commit d88cabfd9a ("nfp: Avoid -Wflex-array-member-not-at-end
warnings") introduced tagged `struct nfp_dump_tl_hdr`. We want
to ensure that when new members need to be added to the flexible
structure, they are always included within this tagged struct.

So, we use `static_assert()` to ensure that the memory layout for
both the flexible structure and the tagged struct is the same after
any changes.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/ZrVB43Hen0H5WQFP@cute
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Gustavo A. R. Silva 2024-08-08 16:08:35 -06:00 committed by Jakub Kicinski
parent e2d0fadd70
commit 46dd90fe51
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c
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@ -41,6 +41,8 @@ struct nfp_dump_tl {
);
char data[];
};
static_assert(offsetof(struct nfp_dump_tl, data) == sizeof(struct nfp_dump_tl_hdr),
"struct member likely outside of struct_group_tagged()");
/* NFP CPP parameters */
struct nfp_dumpspec_cpp_isl_id {